Package com.google.common.testing

Class EquivalenceTester<T>

java.lang.Object

com.google.common.testing.EquivalenceTester<T>

@Beta
@GwtCompatible
public final class EquivalenceTester<T>
extends Object

Tester for Equivalence relationships between groups of objects.

To use, create a new EquivalenceTester and add equivalence groups where each group contains objects that are supposed to be equal to each other. Objects of different groups are expected to be unequal. For example:

 EquivalenceTester.of(someStringEquivalence)
     .addEquivalenceGroup("hello", "h" + "ello")
     .addEquivalenceGroup("world", "wor" + "ld")
     .test();
 

Note that testing Object.equals(Object) is more simply done using the EqualsTester. It includes an extra test against an instance of an arbitrary class without having to explicitly add another equivalence group.

Since:

10.0

Author:

Gregory Kick

Method Summary

Modifier and Type	Method	Description
EquivalenceTester<T>	addEquivalenceGroup(Iterable<T> group)
EquivalenceTester<T>	addEquivalenceGroup(T first, T... rest)	Adds a group of objects that are supposed to be equivalent to each other and not equivalent to objects in any other equivalence group added to this tester.
static <T> EquivalenceTester<T>	of(com.google.common.base.Equivalence<? super T> equivalence)
EquivalenceTester<T>	test()	Run tests on equivalence methods, throwing a failure on an invalid test

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

of

public static <T> EquivalenceTester<T> of(com.google.common.base.Equivalence<? super T> equivalence)

addEquivalenceGroup

public EquivalenceTester<T> addEquivalenceGroup(T first,
                                                T... rest)

Adds a group of objects that are supposed to be equivalent to each other and not equivalent to objects in any other equivalence group added to this tester.

addEquivalenceGroup

public EquivalenceTester<T> addEquivalenceGroup(Iterable<T> group)

test

public EquivalenceTester<T> test()

Run tests on equivalence methods, throwing a failure on an invalid test