com.diffplug.common.testing

Class ForwardingWrapperTester

java.lang.Object

com.diffplug.common.testing.ForwardingWrapperTester

@Beta
public final class ForwardingWrapperTester
extends Object

Tester to ensure forwarding wrapper works by delegating calls to the corresponding method with the same parameters forwarded and return value forwarded back or exception propagated as is.

For example:

 
  new ForwardingWrapperTester().testForwarding(Foo.class, new Function<Foo, Foo>() {
    public Foo apply(Foo foo) {
      return new ForwardingFoo(foo);
    }  });

Since:

14.0

Constructor Summary

Constructors

Constructor and Description
ForwardingWrapperTester()

Method Summary

Modifier and Type	Method and Description
ForwardingWrapperTester	includingEquals() Asks for Object.equals(java.lang.Object) and Object.hashCode() to be tested.
<T> void	testForwarding(Class<T> interfaceType, Function<? super T,? extends T> wrapperFunction) Tests that the forwarding wrapper returned by wrapperFunction properly forwards method calls with parameters passed as is, return value returned as is, and exceptions propagated as is.

Methods inherited from class java.lang.Object

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

Constructor Detail

ForwardingWrapperTester

public ForwardingWrapperTester()

Method Detail

includingEquals

public ForwardingWrapperTester includingEquals()

Asks for Object.equals(java.lang.Object) and Object.hashCode() to be tested. That is, forwarding wrappers of equal instances should be equal.

testForwarding

public <T> void testForwarding(Class<T> interfaceType,
                               Function<? super T,? extends T> wrapperFunction)

Tests that the forwarding wrapper returned by wrapperFunction properly forwards method calls with parameters passed as is, return value returned as is, and exceptions propagated as is.