EquivalenceTester

java.lang.Object
- com.google.common.testing.EquivalenceTester<T>

```
@Beta
@GwtCompatible
public final class EquivalenceTester<T>
extends java.lang.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 TODO(gak): turn this into a test suite so that each test can fail independently

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`EquivalenceTester<T>`	`addEquivalenceGroup(java.lang.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(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(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(java.lang.Iterable<T> group)

test
```
public EquivalenceTester<T> test()
```
Run tests on equivalence methods, throwing a failure on an invalid test