o != arg0
is the same as !(o == (arg0))
.
o != arg0
is the same as !(o == (arg0))
.
the object to compare against this object for dis-equality.
false
if the receiver object is equivalent to the argument; true
otherwise.
o == arg0
is the same as if (o eq null) arg0 eq null else o.equals(arg0)
.
o == arg0
is the same as if (o eq null) arg0 eq null else o.equals(arg0)
.
the object to compare against this object for equality.
true
if the receiver object is equivalent to the argument; false
otherwise.
o == arg0
is the same as o.equals(arg0)
.
o == arg0
is the same as o.equals(arg0)
.
the object to compare against this object for equality.
true
if the receiver object is equivalent to the argument; false
otherwise.
Check to see if a property on the specified object, objectWithProperty
, matches its
expected value, and report the result in
the returned HavePropertyMatchResult
. The objectWithProperty
is
usually the value to the left of a should
or must
invocation. For example, book
would be passed as the objectWithProperty
in:
Check to see if a property on the specified object, objectWithProperty
, matches its
expected value, and report the result in
the returned HavePropertyMatchResult
. The objectWithProperty
is
usually the value to the left of a should
or must
invocation. For example, book
would be passed as the objectWithProperty
in:
book should have (title ("Moby Dick"))
the object with the property against which to match
the HavePropertyMatchResult
that represents the result of the match
This method is used to cast the receiver object to be of type T0
.
This method is used to cast the receiver object to be of type T0
.
Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String]
will throw a ClassCastException
at runtime, while the expressionList(1).asInstanceOf[List[String]]
will not. In the latter example, because the type argument is erased as
part of compilation it is not possible to check whether the contents of the list are of the requested typed.
the receiver object.
This method creates and returns a copy of the receiver object.
This method creates and returns a copy of the receiver object.
The default implementation of the clone
method is platform dependent.
a copy of the receiver object.
Compose this HavePropertyMatcher
with the passed function, returning a new HavePropertyMatcher
.
Compose this HavePropertyMatcher
with the passed function, returning a new HavePropertyMatcher
.
This method overrides compose
on Function1
to
return a more specific function type of HavePropertyMatcher
.
This method is used to test whether the argument (arg0
) is a reference to the
receiver object (this
).
This method is used to test whether the argument (arg0
) is a reference to the
receiver object (this
).
The eq
method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on
non-null instances of AnyRef
:
* It is reflexive: for any non-null instance x
of type AnyRef
, x.eq(x)
returns true
.
* It is symmetric: for any non-null instances x
and y
of type AnyRef
, x.eq(y)
returns true
if and
only if y.eq(x)
returns true
.
* It is transitive: for any non-null instances x
, y
, and z
of type AnyRef
if x.eq(y)
returns true
and y.eq(z)
returns true
, then x.eq(z)
returns true
.
Additionally, the eq
method has three other properties.
* It is consistent: for any non-null instances x
and y
of type AnyRef
, multiple invocations of
x.eq(y)
consistently returns true
or consistently returns false
.
* For any non-null instance x
of type AnyRef
, x.eq(null)
and null.eq(x)
returns false
.
* null.eq(null)
returns true
.
When overriding the equals
or hashCode
methods, it is important to ensure that their behavior is
consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2
), they
should be equal to each other (o1 == o2
) and they should hash to the same value (o1.hashCode == o2.hashCode
).
the object to compare against this object for reference equality.
true
if the argument is a reference to the receiver object; false
otherwise.
This method is used to compare the receiver object (this
) with the argument object (arg0
) for equivalence.
This method is used to compare the receiver object (this
) with the argument object (arg0
) for equivalence.
The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence
relation]:
* It is reflexive: for any instance x
of type Any
, x.equals(x)
should return true
.
* It is symmetric: for any instances x
and y
of type Any
, x.equals(y)
should return true
if and
only if y.equals(x)
returns true
.
* It is transitive: for any instances x
, y
, and z
of type AnyRef
if x.equals(y)
returns true
and
y.equals(z)
returns true
, then x.equals(z)
should return true
.
If you override this method, you should verify that your implementation remains an equivalence relation.
Additionally, when overriding this method it is often necessary to override hashCode
to ensure that objects
that are "equal" (o1.equals(o2)
returns true
) hash to the same
scala.Int
(o1.hashCode.equals(o2.hashCode)
).
the object to compare against this object for equality.
true
if the receiver object is equivalent to the argument; false
otherwise.
This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
The details of when and if the finalize
method are invoked, as well as the interaction between finalize
and non-local returns and exceptions, are all platform dependent.
Returns a representation that corresponds to the dynamic class of the receiver object.
Returns a representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
Returns a hash code value for the object.
Returns a hash code value for the object.
The default hashing algorithm is platform dependent.
Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)
) yet
not be equal (o1.equals(o2)
returns false
). A degenerate implementation could always return 0
.
However, it is required that if two objects are equal (o1.equals(o2)
returns true
) that they have
identical hash codes (o1.hashCode.equals(o2.hashCode)
). Therefore, when overriding this method, be sure
to verify that the behavior is consistent with the equals
method.
the hash code value for the object.
This method is used to test whether the dynamic type of the receiver object is T0
.
This method is used to test whether the dynamic type of the receiver object is T0
.
Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String]
will return false
, while the expression List(1).isInstanceOf[List[String]]
will
return true
. In the latter example, because the type argument is erased as part of compilation it is not
possible to check whether the contents of the list are of the requested typed.
true
if the receiver object is an instance of erasure of type T0
; false
otherwise.
o.ne(arg0)
is the same as !(o.eq(arg0))
.
o.ne(arg0)
is the same as !(o.eq(arg0))
.
the object to compare against this object for reference dis-equality.
false
if the argument is not a reference to the receiver object; true
otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
Returns a string representation of the object.
Returns a string representation of the object.
The default representation is platform dependent.
a string representation of the object.
Trait extended by matcher objects, which may appear after the word
have
, that can match against a property of the type specified by theHavePropertyMatcher
's second type parameterP
.HavePropertyMatcher
's first type parameter,T
, specifies the type that declares the property. The match will succeed if and only if the value of the property equals the specified value. The object containing the property is passed to theHavePropertyMatcher
'sapply
method. The result is aHavePropertyMatchResult[P]
. AHavePropertyMatcher
is, therefore, a function from the specified type,T
, to aHavePropertyMatchResult[P]
.Although
HavePropertyMatcher
andMatcher
represent similar concepts, they have no inheritance relationship becauseMatcher
is intended for use right aftershould
ormust
whereasHavePropertyMatcher
is intended for use right afterhave
.A
HavePropertyMatcher
essentially allows you to write statically typed property assertions similar to the dynamic ones that use symbols:One good way to organize custom matchers is to place them inside one or more traits that you can then mix into the suites or specs that need them. Here's an example that includes two methods that produce
HavePropertyMatcher
s:Each time the
title
method is called, it returns a newHavePropertyMatcher[Book, String]
that can be used to match against thetitle
property of theBook
passed to itsapply
method. Because the type parameter of these twoHavePropertyMatcher
s isBook
, they can only be used with instances of that type. (The compiler will enforce this.) The match will succeed if thetitle
property equals the value passed asexpectedValue
. If the match succeeds, thematches
field of the returnedHavePropertyMatchResult
will betrue
. The second field,propertyName
, is simply the string name of the property. The third and fourth fields,expectedValue
andactualValue
indicate the expected and actual values, respectively, for the property. Here's an example that uses theseHavePropertyMatchers
:These matches should succeed, but if for example the first property,
title ("Moby Dick")
, were to fail, you would get an error message like:For more information on
HavePropertyMatchResult
and the meaning of its fields, please see the documentation forHavePropertyMatchResult
. To understand whyHavePropertyMatcher
is contravariant in its type parameter, see the section entitled "Matcher's variance" in the documentation forMatcher
.