Helper class used by code generated by the assert macro.
Class used via an implicit conversion to enable two objects to be compared with
=== and !== with a Boolean result and an enforced type constraint between
two object types.
Class used via an implicit conversion to enable any two objects to be compared with
=== and !== with a Boolean result and no enforced type constraint between
two object types.
Class used via an implicit conversion to enable any two objects to be compared with
=== and !== with an Option[String] result and an enforced type constraint between
two object types.
Class used via an implicit conversion to enable any two objects to be compared with
=== and !== with an Option[String] result and no enforced type constraint between
two object types.
A test function taking no arguments and returning an Outcome.
Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate
the “<left> should !== (<pivot> +- <tolerance>)”
syntax of Matchers.
Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate
the “<left> should !== (<pivot> +- <tolerance>)”
syntax of Matchers.
the Spread[T] against which to compare the left-hand value
a TripleEqualsInvocationOnSpread wrapping the passed Spread[T] value, with
expectingEqual set to false.
Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate
the “<left> should !== null” syntax
of Matchers.
Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate
the “<left> should !== null” syntax
of Matchers.
a null reference
a TripleEqualsInvocation wrapping the passed null value, with expectingEqual
set to false.
Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate
the “<left> should !== <right>” syntax
of Matchers.
Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate
the “<left> should !== <right>” syntax
of Matchers.
the right-hand side value for an equality assertion
a TripleEqualsInvocation wrapping the passed right value, with expectingEqual
set to false.
Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate
the “<left> should === (<pivot> +- <tolerance>)”
syntax of Matchers.
Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate
the “<left> should === (<pivot> +- <tolerance>)”
syntax of Matchers.
the Spread[T] against which to compare the left-hand value
a TripleEqualsInvocationOnSpread wrapping the passed Spread[T] value, with
expectingEqual set to true.
Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate
the “<left> should === null” syntax
of Matchers.
Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate
the “<left> should === null” syntax
of Matchers.
a null reference
a TripleEqualsInvocation wrapping the passed null value, with expectingEqual
set to true.
Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate
the “<left> should === <right>” syntax
of Matchers.
Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate
the “<left> should === <right>” syntax
of Matchers.
the right-hand side value for an equality assertion
a TripleEqualsInvocation wrapping the passed right value, with expectingEqual
set to true.
Assert that a boolean condition, described in String
message, is true.
Assert that a boolean condition, described in String
message, is true.
If the condition is true, this method returns normally.
Else, it throws TestFailedException with the
String obtained by invoking toString on the
specified clue as the exception's detail message.
the boolean condition to assert
An objects whose toString method returns a message to include in a failure report.
if message is null.
if the condition is false.
Assert that a boolean condition is true.
Assert that a boolean condition is true.
If the condition is true, this method returns normally.
Else, it throws TestFailedException.
This method is implemented in terms of a Scala macro that will generate a more helpful error message for simple quality checks of this form:
Any other form of expression will just get a plain-old TestFailedException at this time. In the future,
we will enhance this macro to give helpful error messages in more situations. In ScalaTest 2.0, however, this behavior
was sufficient to allow the === that returns Boolean, not Option[String] to be
the default in tests. This makes === consistent between tests and production code. If you have pre-existing
code you wrote under ScalaTest 1.x, in which you are expecting=== to return an Option[String],
use can get that behavior back by mixing in trait LegacyTripleEquals.
the boolean condition to assert
if the condition is false.
Assert that the value passed as expected equals the value passed as actual.
Assert that the value passed as expected equals the value passed as actual.
If the actual value equals the expected value
(as determined by ==), assertResult returns
normally. Else, assertResult throws a
TestFailedException whose detail message includes the expected and actual values.
the expected value
the actual value, which should equal the passed expected value
if the passed actual value does not equal the passed expected value.
Assert that the value passed as expected equals the value passed as actual.
Assert that the value passed as expected equals the value passed as actual.
If the actual equals the expected
(as determined by ==), assertResult returns
normally. Else, if actual is not equal to expected, assertResult throws a
TestFailedException whose detail message includes the expected and actual values, as well as the String
obtained by invoking toString on the passed clue.
the expected value
An object whose toString method returns a message to include in a failure report.
the actual value, which should equal the passed expected value
if the passed actual value does not equal the passed expected value.
Helper instance used by code generated by macro assertion.
Helper instance used by code generated by macro assertion.
Assume that a boolean condition, described in String
message, is true.
Assume that a boolean condition, described in String
message, is true.
If the condition is true, this method returns normally.
Else, it throws TestCanceledException with the
String obtained by invoking toString on the
specified clue as the exception's detail message.
the boolean condition to assume
An objects whose toString method returns a message to include in a failure report.
if message is null.
if the condition is false.
Assume that a boolean condition is true.
Assume that a boolean condition is true.
If the condition is true, this method returns normally.
Else, it throws TestCanceledException.
This method is implemented in terms of a Scala macro that will generate a more helpful error message for simple quality checks of this form:
Any other form of expression will just get a plain-old TestCanceledException at this time. In the future,
we will enhance this macro to give helpful error messages in more situations. In ScalaTest 2.0, however, this behavior
was sufficient to allow the === that returns Boolean, not Option[String] to be
the default in tests. This makes === consistent between tests and production code. If you have pre-existing
code you wrote under ScalaTest 1.x, in which you are expecting=== to return an Option[String],
use can get that behavior back by mixing in trait LegacyTripleEquals.
the boolean condition to assume
if the condition is false.
Throws TestCanceledException, with the passed
Throwable cause, to indicate a test failed.
Throws TestCanceledException, with the passed
Throwable cause, to indicate a test failed.
The getMessage method of the thrown TestCanceledException
will return cause.toString.
a Throwable that indicates the cause of the cancellation.
if cause is null
Throws TestCanceledException, with the passed
String message as the exception's detail
message and Throwable cause, to indicate a test failed.
Throws TestCanceledException, with the passed
String message as the exception's detail
message and Throwable cause, to indicate a test failed.
A message describing the failure.
A Throwable that indicates the cause of the failure.
if message or cause is null
Throws TestCanceledException, with the passed
String message as the exception's detail
message, to indicate a test was canceled.
Throws TestCanceledException, with the passed
String message as the exception's detail
message, to indicate a test was canceled.
A message describing the cancellation.
if message is null
Throws TestCanceledException to indicate a test was canceled.
Throws TestCanceledException to indicate a test was canceled.
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that B is
implicitly convertible to A, given an implicit Equivalence[A].
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that B is
implicitly convertible to A, given an implicit Equivalence[A].
The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
ConversionCheckedTripleEquals) and
ConversionCheckedLegacyTripleEquals, and
overriden as non-implicit by the other subtraits in this package.
an Equivalence[A] type class to which the Constraint.areEqual method will delegate to determine equality.
an implicit conversion from B to A
a Constraint[A, B] whose areEqual method delegates to the areEquivalent method of
the passed Equivalence[A].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that A must be a subtype of B, given an explicit Equivalence[B].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that A must be a subtype of B, given an explicit Equivalence[B].
This method is used to enable the Explicitly DSL for
TypeCheckedTripleEquals by requiring an explicit Equivalance[B], but
taking an implicit function that provides evidence that A is a subtype of B.
The returned Constraint's areEqual method uses the implicitly passed Equivalence[B]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
LowPriorityTypeCheckedConstraint (extended by
TypeCheckedTripleEquals), and
LowPriorityTypeCheckedLegacyConstraint (extended by
TypeCheckedLegacyTripleEquals), and
overriden as non-implicit by the other subtraits in this package.
an Equivalence[B] type class to which the Constraint.areEqual method
will delegate to determine equality.
evidence that A is a subype of B
a Constraint[A, B] whose areEqual method delegates to the
areEquivalent method of the passed Equivalence[B].
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that A is
implicitly convertible to B, given an explicit Equivalence[B].
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that A is
implicitly convertible to B, given an explicit Equivalence[B].
This method is used to enable the Explicitly DSL for
ConversionCheckedTripleEquals by requiring an explicit Equivalance[B], but
taking an implicit function that converts from A to B.
The returned Constraint's areEqual method uses the implicitly passed Equivalence[B]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
LowPriorityConversionCheckedConstraint (extended by
ConversionCheckedTripleEquals), and
LowPriorityConversionCheckedLegacyConstraint (extended by
ConversionCheckedLegacyTripleEquals), and
overriden as non-implicit by the other subtraits in this package.
a Constraint[A, B] whose areEqual method delegates to the areEquivalent method of
the passed Equivalence[B].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that B must be a subtype of A, given an explicit Equivalence[A].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that B must be a subtype of A, given an explicit Equivalence[A].
This method is used to enable the Explicitly DSL for
TypeCheckedTripleEquals by requiring an explicit Equivalance[B], but
taking an implicit function that provides evidence that A is a subtype of B. For example, under TypeCheckedTripleEquals,
this method (as an implicit method), would be used to compile this statement:
def closeEnoughTo1(num: Double): Boolean = (num === 1.0)(decided by forgivingEquality)
The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
TypeCheckedTripleEquals) and
TypeCheckedLegacyTripleEquals, and
overriden as non-implicit by the other subtraits in this package.
evidence that B is a subype of A
a Constraint[A, B] whose areEqual method delegates to the areEquivalent method of
the passed Equivalence[A].
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that B is
implicitly convertible to A, given an explicit Equivalence[A].
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that B is
implicitly convertible to A, given an explicit Equivalence[A].
This method is used to enable the Explicitly DSL for
ConversionCheckedTripleEquals by requiring an explicit Equivalance[A], but
taking an implicit function that converts from B to A. For example, under ConversionCheckedTripleEquals,
this method (as an implicit method), would be used to compile this statement:
def closeEnoughTo1(num: Double): Boolean = (num === 1.0)(decided by forgivingEquality)
The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
ConversionCheckedTripleEquals) and
ConversionCheckedLegacyTripleEquals, and
overriden as non-implicit by the other subtraits in this package.
an Equivalence[A] type class to which the Constraint.areEqual method will delegate to determine equality.
a Constraint[A, B] whose areEqual method delegates to the areEquivalent method of
the passed Equivalence[A].
Converts to an CheckingEqualizer that provides === and !== operators
that result in Boolean and enforce a type constraint.
Converts to an CheckingEqualizer that provides === and !== operators
that result in Boolean and enforce a type constraint.
This method is overridden and made implicit by subtraits TypeCheckedTripleEquals and
ConversionCheckedTripleEquals, and overriden as
non-implicit by the other subtraits in this package.
the object whose type to convert to CheckingEqualizer.
if left is null.
Converts to an Equalizer that provides === and !== operators that
result in Boolean and enforce no type constraint.
Converts to an Equalizer that provides === and !== operators that
result in Boolean and enforce no type constraint.
This method is overridden and made implicit by subtrait TripleEquals and overriden as non-implicit by the other
subtraits in this package.
the object whose type to convert to Equalizer.
if left is null.
Converts to a LegacyCheckingEqualizer that provides === and !== operators
that result in Option[String] and enforce a type constraint.
Converts to a LegacyCheckingEqualizer that provides === and !== operators
that result in Option[String] and enforce a type constraint.
This method is overridden and made implicit by subtraits TypeCheckedLegacyTripleEquals
and ConversionCheckedLegacyTripleEquals, and
overriden as non-implicit by the other subtraits in this package.
the object whose type to convert to LegacyCheckingEqualizer.
if left is null.
Converts to a LegacyEqualizer that provides === and !== operators that
result in Option[String] and enforce no type constraint.
Converts to a LegacyEqualizer that provides === and !== operators that
result in Option[String] and enforce no type constraint.
This method is overridden and made implicit by subtrait LegacyTripleEquals and overriden as non-implicit
by the other subtraits in this package.
the object whose type to convert to LegacyEqualizer.
if left is null.
Returns an Equality[A] for any type A that determines equality
by first calling .deep on any Array (on either the left or right side),
then comparing the resulting objects with ==.
Returns an Equality[A] for any type A that determines equality
by first calling .deep on any Array (on either the left or right side),
then comparing the resulting objects with ==.
a default Equality for type A
Executes this Suite, printing results to the standard output.
Executes this Suite, printing results to the standard output.
This method, which simply invokes the other overloaded form of execute with default parameter values,
is intended for use only as a mini-DSL for the Scala interpreter. It allows you to execute a Suite in the
interpreter with a minimum of finger typing:
scala> new SetSpec execute An empty Set - should have size 0 - should produce NoSuchElementException when head is invoked !!! IGNORED !!!
If you do ever want to invoke execute outside the Scala interpreter, it is best style to invoke it with
empty parens to indicate it has a side effect, like this:
// Use empty parens form in regular code (outside the Scala interpreter) (new ExampleSuite).execute()
Executes one or more tests in this Suite, printing results to the standard output.
Executes one or more tests in this Suite, printing results to the standard output.
This method invokes run on itself, passing in values that can be configured via the parameters to this
method, all of which have default values. This behavior is convenient when working with ScalaTest in the Scala interpreter.
Here's a summary of this method's parameters and how you can use them:
The testName parameter
If you leave testName at its default value (of null), this method will pass None to
the testName parameter of run, and as a result all the tests in this suite will be executed. If you
specify a testName, this method will pass Some(testName) to run, and only that test
will be run. Thus to run all tests in a suite from the Scala interpreter, you can write:
scala> new ExampleSuite execute
(The above syntax actually invokes the overloaded parameterless form of execute, which calls this form with its default parameter values.)
To run just the test named "my favorite test" in a suite from the Scala interpreter, you would write:
scala> new ExampleSuite execute ("my favorite test")
Or:
scala> new ExampleSuite execute (testName = "my favorite test")
The configMap parameter
If you provide a value for the configMap parameter, this method will pass it to run. If not, the default value
of an empty Map will be passed. For more information on how to use a config map to configure your test suites, see
the config map section in the main documentation for this trait. Here's an example in which you configure
a run with the name of an input file:
scala> new ExampleSuite execute (configMap = Map("inputFileName" -> "in.txt")
The color parameter
If you leave the color parameter unspecified, this method will configure the reporter it passes to run to print
to the standard output in color (via ansi escape characters). If you don't want color output, specify false for color, like this:
scala> new ExampleSuite execute (color = false)
The durations parameter
If you leave the durations parameter unspecified, this method will configure the reporter it passes to run to
not print durations for tests and suites to the standard output. If you want durations printed, specify true for durations,
like this:
scala> new ExampleSuite execute (durations = true)
The shortstacks and fullstacks parameters
If you leave both the shortstacks and fullstacks parameters unspecified, this method will configure the reporter
it passes to run to not print stack traces for failed tests if it has a stack depth that identifies the offending
line of test code. If you prefer a short stack trace (10 to 15 stack frames) to be printed with any test failure, specify true for
shortstacks:
scala> new ExampleSuite execute (shortstacks = true)
For full stack traces, set fullstacks to true:
scala> new ExampleSuite execute (fullstacks = true)
If you specify true for both shortstacks and fullstacks, you'll get full stack traces.
The stats parameter
If you leave the stats parameter unspecified, this method will not fire RunStarting and either RunCompleted
or RunAborted events to the reporter it passes to run.
If you specify true for stats, this method will fire the run events to the reporter, and the reporter will print the
expected test count before the run, and various statistics after, including the number of suites completed and number of tests that
succeeded, failed, were ignored or marked pending. Here's how you get the stats:
scala> new ExampleSuite execute (stats = true)
To summarize, this method will pass to run:
testName - None if this method's testName parameter is left at its default value of null, else Some(testName).reporter - a reporter that prints to the standard outputstopper - a Stopper whose apply method always returns falsefilter - a Filter constructed with None for tagsToInclude and Set()
for tagsToExcludeconfigMap - the configMap passed to this methoddistributor - Nonetracker - a new TrackerNote: In ScalaTest, the terms "execute" and "run" basically mean the same thing and
can be used interchangably. The reason this method isn't named run is that it takes advantage of
default arguments, and you can't mix overloaded methods and default arguments in Scala. (If named run,
this method would have the same name but different arguments than the main run method that
takes seven arguments. Thus it would overload and couldn't be used with default argument values.)
Design note: This method has two "features" that may seem unidiomatic. First, the default value of testName is null.
Normally in Scala the type of testName would be Option[String] and the default value would
be None, as it is in this trait's run method. The null value is used here for two reasons. First, in
ScalaTest 1.5, execute was changed from four overloaded methods to one method with default values, taking advantage of
the default and named parameters feature introduced in Scala 2.8.
To not break existing source code, testName needed to have type String, as it did in two of the overloaded
execute methods prior to 1.5. The other reason is that execute has always been designed to be called primarily
from an interpeter environment, such as the Scala REPL (Read-Evaluate-Print-Loop). In an interpreter environment, minimizing keystrokes is king.
A String type with a null default value lets users type suite.execute("my test name") rather than
suite.execute(Some("my test name")), saving several keystrokes.
The second non-idiomatic feature is that shortstacks and fullstacks are all lower case rather than
camel case. This is done to be consistent with the Shell, which also uses those forms. The reason
lower case is used in the Shell is to save keystrokes in an interpreter environment. Most Unix commands, for
example, are all lower case, making them easier and quicker to type. In the ScalaTest
Shell, methods like shortstacks, fullstacks, and nostats, etc., are
designed to be all lower case so they feel more like shell commands than methods.
the name of one test to run.
a Map of key-value pairs that can be used by the executing Suite of tests.
a boolean that configures whether output is printed in color
a boolean that configures whether test and suite durations are printed to the standard output
a boolean that configures whether short stack traces should be printed for test failures
a boolean that configures whether full stack traces should be printed for test failures
a boolean that configures whether test and suite statistics are printed to the standard output
if testName is defined, but no test with the specified test name
exists in this Suite
if the passed configMap parameter is null.
Returns the result obtained from invoking expectedTestCount on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor, passing into the wrapped suite's
expectedTestCount method the specified Filter.
Returns the result obtained from invoking expectedTestCount on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor, passing into the wrapped suite's
expectedTestCount method the specified Filter.
the Filter to pass to the wrapped suite's expectedTestCount method
the result of invoking expectedTestCount on an instance of wrapped suite
Throws TestFailedException, with the passed
Throwable cause, to indicate a test failed.
Throws TestFailedException, with the passed
Throwable cause, to indicate a test failed.
The getMessage method of the thrown TestFailedException
will return cause.toString.
a Throwable that indicates the cause of the failure.
if cause is null
Throws TestFailedException, with the passed
String message as the exception's detail
message and Throwable cause, to indicate a test failed.
Throws TestFailedException, with the passed
String message as the exception's detail
message and Throwable cause, to indicate a test failed.
A message describing the failure.
A Throwable that indicates the cause of the failure.
if message or cause is null
Throws TestFailedException, with the passed
String message as the exception's detail
message, to indicate a test failed.
Throws TestFailedException, with the passed
String message as the exception's detail
message, to indicate a test failed.
A message describing the failure.
if message is null
Throws TestFailedException to indicate a test failed.
Throws TestFailedException to indicate a test failed.
Intercept and return an exception that's expected to be thrown by the passed function value.
Intercept and return an exception that's expected to
be thrown by the passed function value. The thrown exception must be an instance of the
type specified by the type parameter of this method. This method invokes the passed
function. If the function throws an exception that's an instance of the specified type,
this method returns that exception. Else, whether the passed function returns normally
or completes abruptly with a different exception, this method throws TestFailedException.
Note that the type specified as this method's type parameter may represent any subtype of
AnyRef, not just Throwable or one of its subclasses. In
Scala, exceptions can be caught based on traits they implement, so it may at times make sense
to specify a trait that the intercepted exception's class must mix in. If a class instance is
passed for a type that could not possibly be used to catch an exception (such as String,
for example), this method will complete abruptly with a TestFailedException.
the function value that should throw the expected exception
an implicit Manifest representing the type of the specified
type parameter.
the intercepted exception, if it is of the expected type
if the passed function does not complete abruptly with an exception
that's an instance of the specified type
passed expected value.
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that A is
implicitly convertible to B, given an implicit Equivalence[B].
Provides a Constraint[A, B] class for any two types A and B, enforcing the type constraint that A is
implicitly convertible to B, given an implicit Equivalence[B].
The returned Constraint's areEqual method uses the implicitly passed Equivalence[B]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
LowPriorityConversionCheckedConstraint (extended by
ConversionCheckedTripleEquals), and
LowPriorityConversionCheckedLegacyConstraint (extended by
ConversionCheckedLegacyTripleEquals), and
overriden as non-implicit by the other subtraits in this package.
an implicit conversion from A to B
a Constraint[A, B] whose areEqual method delegates to the areEquivalent method of
the passed Equivalence[B].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that A must be a subtype of B, given an implicit Equivalence[B].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that A must be a subtype of B, given an implicit Equivalence[B].
The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
LowPriorityTypeCheckedConstraint (extended by
TypeCheckedTripleEquals), and
LowPriorityTypeCheckedLegacyConstraint (extended by
TypeCheckedLegacyTripleEquals), and
overriden as non-implicit by the other subtraits in this package.
an Equivalence[B] type class to which the Constraint.areEqual method
will delegate to determine equality.
evidence that A is a subype of B
a Constraint[A, B] whose areEqual method delegates to the
areEquivalent method of the passed Equivalence[B].
Returns the result obtained from invoking nestedSuites on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor.
Returns the result obtained from invoking nestedSuites on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor.
the result of invoking nestedSuites on an instance of wrapped suite
Throws TestPendingException to indicate a test is pending.
Throws TestPendingException to indicate a test is pending.
A pending test is one that has been given a name but is not yet implemented. The purpose of pending tests is to facilitate a style of testing in which documentation of behavior is sketched out before tests are written to verify that behavior (and often, the before the behavior of the system being tested is itself implemented). Such sketches form a kind of specification of what tests and functionality to implement later.
To support this style of testing, a test can be given a name that specifies one
bit of behavior required by the system being tested. The test can also include some code that
sends more information about the behavior to the reporter when the tests run. At the end of the test,
it can call method pending, which will cause it to complete abruptly with TestPendingException.
Because tests in ScalaTest can be designated as pending with TestPendingException, both the test name and any information
sent to the reporter when running the test can appear in the report of a test run. (In other words,
the code of a pending test is executed just like any other test.) However, because the test completes abruptly
with TestPendingException, the test will be reported as pending, to indicate
the actual test, and possibly the functionality it is intended to test, has not yet been implemented.
Note: This method always completes abruptly with a TestPendingException. Thus it always has a side
effect. Methods with side effects are usually invoked with parentheses, as in pending(). This
method is defined as a parameterless method, in flagrant contradiction to recommended Scala style, because it
forms a kind of DSL for pending tests. It enables tests in suites such as FunSuite or FunSpec
to be denoted by placing "(pending)" after the test name, as in:
test("that style rules are not laws") (pending)
Readers of the code see "pending" in parentheses, which looks like a little note attached to the test name to indicate
it is pending. Whereas "(pending()) looks more like a method call, "(pending)" lets readers
stay at a higher level, forgetting how it is implemented and just focusing on the intent of the programmer who wrote the code.
Execute the passed block of code, and if it completes abruptly, throw TestPendingException, else
throw TestFailedException.
Execute the passed block of code, and if it completes abruptly, throw TestPendingException, else
throw TestFailedException.
This method can be used to temporarily change a failing test into a pending test in such a way that it will
automatically turn back into a failing test once the problem originally causing the test to fail has been fixed.
At that point, you need only remove the pendingUntilFixed call. In other words, a
pendingUntilFixed surrounding a block of code that isn't broken is treated as a test failure.
The motivation for this behavior is to encourage people to remove pendingUntilFixed calls when
there are no longer needed.
This method facilitates a style of testing in which tests are written before the code they test. Sometimes you may
encounter a test failure that requires more functionality than you want to tackle without writing more tests. In this
case you can mark the bit of test code causing the failure with pendingUntilFixed. You can then write more
tests and functionality that eventually will get your production code to a point where the original test won't fail anymore.
At this point the code block marked with pendingUntilFixed will no longer throw an exception (because the
problem has been fixed). This will in turn cause pendingUntilFixed to throw TestFailedException
with a detail message explaining you need to go back and remove the pendingUntilFixed call as the problem orginally
causing your test code to fail has been fixed.
a block of code, which if it completes abruptly, should trigger a TestPendingException
if the passed block of code completes abruptly with an Exception or AssertionError
The fully qualified class name of the rerunner to rerun this suite.
The fully qualified class name of the rerunner to rerun this suite. This implementation will look at this.getClass and see if it is either an accessible Suite, or it has a WrapWith annotation. If so, it returns the fully qualified class name wrapped in a Some, or else it returns None.
Constructs a new instance of the suite to wrap, whose Class is passed to this
suite's constructor, passing in the specified config map, and invokes run on
that new instance, passing in the same arguments passed to this method.
Constructs a new instance of the suite to wrap, whose Class is passed to this
suite's constructor, passing in the specified config map, and invokes run on
that new instance, passing in the same arguments passed to this method.
an optional name of one test to run. If None, all relevant tests should be run.
I.e., None acts like a wildcard that means run all relevant tests in this Suite.
the Args for this run
a Status object that indicates when all tests and nested suites started by this method have completed, and whether or not a failure occurred.
if testName is defined, but no test with the specified test name
exists in the Suite
if any passed parameter is null.
This overloaded form of run has been deprecated and will be removed in a future
version of ScalaTest. Please use the run method that takes two parameters instead.
This overloaded form of run has been deprecated and will be removed in a future
version of ScalaTest. Please use the run method that takes two parameters instead.
This final implementation of this method constructs a Args instance from the passed
reporter, stopper, filter, configMap, distributor,
and tracker, and invokes the overloaded run method that takes two parameters,
passing in the specified testName and the newly constructed Args. This method
implementation enables existing code that called into the old run method to continue to work
during the deprecation cycle. Subclasses and subtraits that overrode this method, however, will need to
be changed to use the new two-parameter form instead.
an optional name of one test to execute. If None, all relevant tests should be executed.
I.e., None acts like a wildcard that means execute all relevant tests in this Suite.
the Reporter to which results will be reported
the Stopper that will be consulted to determine whether to stop execution early.
a Filter with which to filter tests based on their tags
a Map of key-value pairs that can be used by the executing Suite of tests.
an optional Distributor, into which to put nested Suites to be executed
by another entity, such as concurrently by a pool of threads. If None, nested Suites will be executed sequentially.
a Tracker tracking Ordinals being fired by the current thread.
if any passed parameter is null.
Run zero to many of this Suite's nested Suites.
Run zero to many of this Suite's nested Suites.
If the passed distributor is None, this trait's
implementation of this method invokes run on each
nested Suite in the List obtained by invoking nestedSuites.
If a nested Suite's run
method completes abruptly with an exception, this trait's implementation of this
method reports that the Suite aborted and attempts to run the
next nested Suite.
If the passed distributor is defined, this trait's implementation
puts each nested Suite
into the Distributor contained in the Some, in the order in which the
Suites appear in the List returned by nestedSuites, passing
in a new Tracker obtained by invoking nextTracker on the Tracker
passed to this method.
Implementations of this method are responsible for ensuring SuiteStarting events
are fired to the Reporter before executing any nested Suite, and either SuiteCompleted
or SuiteAborted after executing any nested Suite.
the Args for this run
a Status object that indicates when all nested suites started by this method have completed, and whether or not a failure occurred.
if any passed parameter is null.
Run a test.
Run a test.
This trait's implementation uses Java reflection to invoke on this object the test method identified by the passed testName.
Implementations of this method are responsible for ensuring a TestStarting event
is fired to the Reporter before executing any test, and either TestSucceeded,
TestFailed, TestPending or TestCanceled after executing any nested
Suite. (If a test is marked with the org.scalatest.Ignore tag, the
runTests method is responsible for ensuring a TestIgnored event is fired and that
this runTest method is not invoked for that ignored test.)
the name of one test to run.
the Args for this run
a Status object that indicates when the test started by this method has completed, and whether or not it failed .
if testName is defined, but no test with the specified test name
exists in this Suite
if any of testName or args is null.
Run zero to many of this Suite's tests.
Run zero to many of this Suite's tests.
This method takes a testName parameter that optionally specifies a test to invoke.
If testName is defined, this trait's implementation of this method
invokes runTest on this object, passing in:
testName - the String value of the testName Option passed
to this methodreporter - the Reporter passed to this method, or one that wraps and delegates to itstopper - the Stopper passed to this method, or one that wraps and delegates to itconfigMap - the configMap Map passed to this method, or one that wraps and delegates to itThis method takes a Filter, which encapsulates an optional Set of tag names that should be included
(tagsToInclude) and a Set that should be excluded (tagsToExclude), when deciding which
of this Suite's tests to run.
If tagsToInclude is None, all tests will be run
except those those belonging to tags listed in the tagsToExclude Set. If tagsToInclude is defined, only tests
belonging to tags mentioned in the tagsToInclude Set, and not mentioned in the tagsToExcludeSet
will be run. However, if testName is defined, tagsToInclude and tagsToExclude are essentially ignored.
Only if testName is None will tagsToInclude and tagsToExclude be consulted to
determine which of the tests named in the testNames Set should be run. This trait's implementation
behaves this way, and it is part of the general contract of this method, so all overridden forms of this method should behave
this way as well. For more information on test tags, see the main documentation for this trait and for class Filter.
Note that this means that even if a test is marked as ignored, for example a test method in a Suite annotated with
org.scalatest.Ignore, if that test name is passed as testName to runTest, it will be invoked
despite the Ignore annotation.
If testName is None, this trait's implementation of this method
invokes testNames on this Suite to get a Set of names of tests to potentially run.
(A testNames value of None essentially acts as a wildcard that means all tests in
this Suite that are selected by tagsToInclude and tagsToExclude should be run.)
For each test in the testName Set, in the order
they appear in the iterator obtained by invoking the elements method on the Set, this trait's implementation
of this method checks whether the test should be run based on the Filter.
If so, this implementation invokes runTest, passing in:
testName - the String name of the test to run (which will be one of the names in the testNames Set)reporter - the Reporter passed to this method, or one that wraps and delegates to itstopper - the Stopper passed to this method, or one that wraps and delegates to itconfigMap - the configMap passed to this method, or one that wraps and delegates to itIf a test is marked with the org.scalatest.Ignore tag, implementations
of this method are responsible for ensuring a TestIgnored event is fired for that test
and that runTest is not called for that test.
an optional name of one test to run. If None, all relevant tests should be run.
I.e., None acts like a wildcard that means run all relevant tests in this Suite.
the Args for this run
a Status object that indicates when all tests started by this method have completed, and whether or not a failure occurred.
if testName is defined, but no test with the specified test name
exists in this Suite
if any of the passed parameters is null.
Suite style name.
Suite style name.
A string ID for this Suite that is intended to be unique among all suites reported during a run.
A string ID for this Suite that is intended to be unique among all suites reported during a run.
This trait's
implementation of this method returns the fully qualified name of this object's class.
Each suite reported during a run will commonly be an instance of a different Suite class,
and in such cases, this default implementation of this method will suffice. However, in special cases
you may need to override this method to ensure it is unique for each reported suite. For example, if you write
a Suite subclass that reads in a file whose name is passed to its constructor and dynamically
creates a suite of tests based on the information in that file, you will likely need to override this method
in your Suite subclass, perhaps by appending the pathname of the file to the fully qualified class name.
That way if you run a suite of tests based on a directory full of these files, you'll have unique suite IDs for
each reported suite.
The suite ID is intended to be unique, because ScalaTest does not enforce that it is unique. If it is not unique, then you may not be able to uniquely identify a particular test of a particular suite. This ability is used, for example, to dynamically tag tests as having failed in the previous run when rerunning only failed tests.
this Suite object's ID.
A user-friendly suite name for this Suite.
A user-friendly suite name for this Suite.
This trait's
implementation of this method returns the simple name of this object's class. This
trait's implementation of runNestedSuites calls this method to obtain a
name for Reports to pass to the suiteStarting, suiteCompleted,
and suiteAborted methods of the Reporter.
this Suite object's suite name.
Returns the result obtained from invoking tags on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor.
Returns the result obtained from invoking tags on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor.
the result of invoking testNames on an instance of wrapped suite
Provides a TestData instance for the passed test name, given the passed config map.
Provides a TestData instance for the passed test name, given the passed config map.
This method is used to obtain a TestData instance to pass to withFixture(NoArgTest)
and withFixture(OneArgTest) and the beforeEach and afterEach methods
of trait BeforeAndAfterEach.
the name of the test for which to return a TestData instance
the config map to include in the returned TestData
a TestData instance for the specified test, which includes the specified config map
Returns the result obtained from invoking testNames on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor.
Returns the result obtained from invoking testNames on an instance of the wrapped
suite, constructed by passing an empty config map to its constructor.
the result of invoking testNames on an instance of wrapped suite
Trap and return any thrown exception that would normally cause a ScalaTest test to fail, or create and return a new RuntimeException
indicating no exception is thrown.
Trap and return any thrown exception that would normally cause a ScalaTest test to fail, or create and return a new RuntimeException
indicating no exception is thrown.
This method is intended to be used in the Scala interpreter to eliminate large stack traces when trying out ScalaTest assertions and
matcher expressions. It is not intended to be used in regular test code. If you want to ensure that a bit of code throws an expected
exception, use intercept, not trap. Here's an example interpreter session without trap:
scala> import org.scalatest._ import org.scalatest._scala> import Matchers._ import Matchers._
scala> val x = 12 a: Int = 12
scala> x shouldEqual 13 org.scalatest.exceptions.TestFailedException: 12 did not equal 13 at org.scalatest.Assertions$class.newAssertionFailedException(Assertions.scala:449) at org.scalatest.Assertions$.newAssertionFailedException(Assertions.scala:1203) at org.scalatest.Assertions$AssertionsHelper.macroAssertTrue(Assertions.scala:417) at .<init>(<console>:15) at .<clinit>(<console>) at .<init>(<console>:7) at .<clinit>(<console>) at $print(<console>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:731) at scala.tools.nsc.interpreter.IMain$Request.loadAndRun(IMain.scala:980) at scala.tools.nsc.interpreter.IMain.loadAndRunReq$1(IMain.scala:570) at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:601) at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:565) at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:745) at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:790) at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:702) at scala.tools.nsc.interpreter.ILoop.processLine$1(ILoop.scala:566) at scala.tools.nsc.interpreter.ILoop.innerLoop$1(ILoop.scala:573) at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:576) at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:867) at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:822) at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:822) at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135) at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:822) at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:83) at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:96) at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:105) at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)
That's a pretty tall stack trace. Here's what it looks like when you use trap:
scala> trap { x shouldEqual 13 }
res1: Throwable = org.scalatest.exceptions.TestFailedException: 12 did not equal 13
Much less clutter. Bear in mind, however, that if no exception is thrown by the
passed block of code, the trap method will create a new NormalResult
(a subclass of Throwable made for this purpose only) and return that. If the result was the Unit value, it
will simply say that no exception was thrown:
scala> trap { x shouldEqual 12 }
res2: Throwable = No exception was thrown.
If the passed block of code results in a value other than Unit, the NormalResult's toString will print the value:
scala> trap { "Dude!" }
res3: Throwable = No exception was thrown. Instead, result was: "Dude!"
Although you can access the result value from the NormalResult, its type is Any and therefore not
very convenient to use. It is not intended that trap be used in test code. The sole intended use case for trap is decluttering
Scala interpreter sessions by eliminating stack traces when executing assertion and matcher expressions.
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that B must be a subtype of A, given an implicit Equivalence[A].
Provides a Constraint[A, B] for any two types A and B, enforcing the type constraint
that B must be a subtype of A, given an implicit Equivalence[A].
The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s
areEquivalent method to determine equality.
This method is overridden and made implicit by subtraits
TypeCheckedTripleEquals) and
TypeCheckedLegacyTripleEquals, and
overriden as non-implicit by the other subtraits in this package.
evidence that B is a subype of A
a Constraint[A, B] whose areEqual method delegates to the areEquivalent method of
the passed Equivalence[A].
Provides a Constraint[A, B] class for any two types A and B, with no type constraint enforced, given an
implicit Equality[A].
Provides a Constraint[A, B] class for any two types A and B, with no type constraint enforced, given an
implicit Equality[A].
The returned Constraint's areEqual method uses the implicitly passed Equality[A]'s
areEqual method to determine equality.
This method is overridden and made implicit by subtraits TripleEquals and
LegacyTripleEquals, and
overriden as non-implicit by the other subtraits in this package.
an Equality[A] type class to which the Constraint.areEqual method will delegate to determine equality.
a Constraint[A, B] whose areEqual method delegates to the areEqual method of
the passed Equality[A].
Executes the block of code passed as the second parameter, and, if it
completes abruptly with a ModifiableMessage exception,
prepends the "clue" string passed as the first parameter to the beginning of the detail message
of that thrown exception, then rethrows it.
Executes the block of code passed as the second parameter, and, if it
completes abruptly with a ModifiableMessage exception,
prepends the "clue" string passed as the first parameter to the beginning of the detail message
of that thrown exception, then rethrows it. If clue does not end in a white space
character, one space will be added
between it and the existing detail message (unless the detail message is
not defined).
This method allows you to add more information about what went wrong that will be reported when a test fails. Here's an example:
withClue("(Employee's name was: " + employee.name + ")") { intercept[IllegalArgumentException] { employee.getTask(-1) } }
If an invocation of intercept completed abruptly with an exception, the resulting message would be something like:
(Employee's name was Bob Jones) Expected IllegalArgumentException to be thrown, but no exception was thrown
if the passed clue is null
Run the passed test function in the context of a fixture established by this method.
Run the passed test function in the context of a fixture established by this method.
This method should set up the fixture needed by the tests of the
current suite, invoke the test function, and if needed, perform any clean
up needed after the test completes. Because the NoArgTest function
passed to this method takes no parameters, preparing the fixture will require
side effects, such as reassigning instance vars in this Suite or initializing
a globally accessible external database. If you want to avoid reassigning instance vars
you can use fixture.Suite.
This trait's implementation of runTest invokes this method for each test, passing
in a NoArgTest whose apply method will execute the code of the test.
This trait's implementation of this method simply invokes the passed NoArgTest function.
the no-arg test function to run with a fixture
Assert that an Option[String] is None.
Assert that an Option[String] is None.
If the condition is None, this method returns normally.
Else, it throws TestFailedException with the String
value of the Some included in the TestFailedException's
detail message.
This form of assert is usually called in conjunction with an
implicit conversion to Equalizer, using a === comparison, as in:
assert(a === b)
For more information on how this mechanism works, see the documentation for
Equalizer.
the Option[String] to assert
This method has been deprecated in favor of macro assertion and will be removed in a future version of ScalaTest. If you need this, please copy the source code into your own trait instead.
if the Option[String] is Some.
Assert that an Option[String] is None.
Assert that an Option[String] is None.
If the condition is None, this method returns normally.
Else, it throws TestFailedException with the String
value of the Some, as well as the
String obtained by invoking toString on the
specified clue,
included in the TestFailedException's detail message.
This form of assert is usually called in conjunction with an
implicit conversion to Equalizer, using a === comparison, as in:
assert(a === b, "extra info reported if assertion fails")
For more information on how this mechanism works, see the documentation for
Equalizer.
the Option[String] to assert
An object whose toString method returns a message to include in a failure report.
This method has been deprecated in favor of macro assertion and will be removed in a future version of ScalaTest. If you need this, please copy the source code into your own trait instead.
if message is null.
if the Option[String] is Some.
Assume that an Option[String] is None.
Assume that an Option[String] is None.
If the condition is None, this method returns normally.
Else, it throws TestCanceledException with the String
value of the Some included in the TestCanceledException's
detail message.
This form of assume is usually called in conjunction with an
implicit conversion to Equalizer, using a === comparison, as in:
assume(a === b)
For more information on how this mechanism works, see the documentation for
Equalizer.
the Option[String] to assert
This method has been deprecated in favor of macro assumption and will be removed in a future version of ScalaTest. If you need this, please copy the source code into your own trait instead.
if the Option[String] is Some.
Assume that an Option[String] is None.
Assume that an Option[String] is None.
If the condition is None, this method returns normally.
Else, it throws TestCanceledException with the String
value of the Some, as well as the
String obtained by invoking toString on the
specified clue,
included in the TestCanceledException's detail message.
This form of assume is usually called in conjunction with an
implicit conversion to Equalizer, using a === comparison, as in:
assume(a === b, "extra info reported if assertion fails")
For more information on how this mechanism works, see the documentation for
Equalizer.
the Option[String] to assert
An object whose toString method returns a message to include in a failure report.
This method has been deprecated in favor of macro assumption and will be removed in a future version of ScalaTest. If you need this, please copy the source code into your own trait instead.
if message is null.
if the Option[String] is Some.
This expect method has been deprecated; Please use assertResult instead.
This expect method has been deprecated; Please use assertResult instead.
To get rid of the deprecation warning, simply replace expect with
assertResult. The name expect will be used for a different purposes in
a future version of ScalaTest.
This expect method has been deprecated. Please replace all invocations of expect with an identical invocation of assertResult instead.
This expect method has been deprecated; Please use assertResult instead.
This expect method has been deprecated; Please use assertResult instead.
To get rid of the deprecation warning, simply replace expect with
assertResult. The name expect will be used for a different purposes in
a future version of ScalaTest.
This expect method has been deprecated. Please replace all invocations of expect with an identical invocation of assertResult instead.
This expectResult method has been deprecated; Please use assertResult instead.
This expectResult method has been deprecated; Please use assertResult instead.
To get rid of the deprecation warning, simply replace expectResult with
assertResult. The name expectResult will be used for a different purposes in
a future version of ScalaTest.
This expectResult method has been deprecated. Please replace all invocations of expectResult with an identical invocation of assertResult instead.
This expectResult method has been deprecated; Please use assertResult instead.
This expectResult method has been deprecated; Please use assertResult instead.
To get rid of the deprecation warning, simply replace expectResult with
assertResult. The name expectResult will be used for a different purposes in
a future version of ScalaTest.
This expectResult method has been deprecated. Please replace all invocations of expectResult with an identical invocation of assertResult instead.
Wrapper
Suitethat passes an instance of the config map to the constructor of the wrappedSuitewhenrunis invoked.ConfigMapWrapperSuiteis primarily intended to be used with the "path" traits, which can't use the usual approaches to accessing the config map because of the eager manner in which they run tests.Each time
runis invoked on an instance ofConfigMapWrapperSuite, this suite will create a new instance of the suite to wrap, passing to the constructor the config map passed torun. This way, if the sameConfigMapWrapperSuiteinstance is run multiple times, each time with a different config map, an instance of the wrapped suite will be created for each config map. In addition to being passed to the wrapped suite's constructor, the config map passed to theConfigMapWrapperSuite'srunmethod will also be passed to therunmethod of the newly created wrapped suite instance.The config map is accessible inside a
Suitein many ways. It is passed torun,runNestedSuites,runTests, andrunTest. It is also passed towithFixture, accessible via a method onNoArgTestandOneArgTest. It is passed to an overloaded forms of thebeforeEachandafterEachmethods of traitBeforeAndAfterEach, as well as overloaded forms of thebeforeAllandafterAllmethods of traitBeforeAndAfterAll. Tests themselves can have information taken from the config map, or the entire config map, through various means. The config map may be passed into the test via aConfigMapFixture, for example. ClassConfigMapWrapperSuiterepresents one more way to get at the config map inside a suite of test:ConfigMapWrapperSuitewill pass the config map to the constructor of your suite class, bringing it easily into scope for tests and helper methods alike.Having the config map passed to the suite constructor might be more convenient in some cases, but in the case of the
org.scalatest.pathtraits, it is necessary if a test needs information from a config map. The reason is that in a path trait, the test code is executed eagerly, beforerunis invoked. The results of the tests are registered when the tests are executed, and those results are merely reported oncerunis invoked. Thus by the timerunhas been invoked, it is too late to get the config map to the tests, which have already been executed. Using aConfigMapWrapperSuitesolves that problem. By passing the config map to the constructor, it is available early enough for the running tests to use it. Here's an example: