Assertions

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.

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 message, 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.

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 message as the exception's detail message.

Assert that a boolean condition is true. If the condition is true, this method returns normally. Else, it throws TestFailedException.

Implicit conversion from Any to Equalizer, used to enable assertions with === comparisons.

For more information on this mechanism, see the documentation for Equalizer.

Because trait Suite mixes in Assertions, this implicit conversion will always be available by default in ScalaTest Suites. This is the only implicit conversion that is in scope by default in every ScalaTest Suite. Other implicit conversions offered by ScalaTest, such as those that support the matchers DSL or invokePrivate, must be explicitly invited into your test code, either by mixing in a trait or importing the members of its companion object. The reason ScalaTest requires you to invite in implicit conversions (with the exception of the implicit conversion for === operator) is because if one of ScalaTest's implicit conversions clashes with an implicit conversion used in the code you are trying to test, your program won't compile. Thus there is a chance that if you are ever trying to use a library or test some code that also offers an implicit conversion involving a === operator, you could run into the problem of a compiler error due to an ambiguous implicit conversion. If that happens, you can turn off the implicit conversion offered by this convertToEqualizer method simply by overriding the method in your Suite subclass, but not marking it as implicit:

// In your Suite subclass
override def convertToEqualizer(left: Any) = new Equalizer(left)

Expect that the value passed as expected equals the value passed as actual. If the actual value equals the expected value (as determined by ==), expectResult returns normally. Else, expect throws a TestFailedException whose detail message includes the expected and actual values.

Expect that the value passed as expected equals the value passed as actual. If the actual equals the expected (as determined by ==), expectResult returns normally. Else, if actual is not equal to expected, expectResult 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.

Throws TestFailedException, with the passed Throwable cause, to indicate a test failed. The getMessage method of the thrown TestFailedException will return cause.toString().

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, 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. 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.

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

This expect method has been deprecated; Please use expectResult instead.

To get rid of the deprecation warning, simply replace expect with expectResult. The name expect will be used for a different purposes in a future version of ScalaTest.

This expect method has been deprecated; Please use expectResult instead.

To get rid of the deprecation warning, simply replace expect with expectResult. The name expect will be used for a different purposes in a future version of ScalaTest.