org.inferred.internal.testing

Class Partial

java.lang.Object

org.inferred.internal.testing.Partial

public class Partial
extends java.lang.Object

Utility methods for creating partial type implementations for tests.

Concrete partial types can be created by generating UnsupportedOperationException-throwing implementations for all methods that should not be called in the test. This has some issues:

1. All the boilerplate obscures the intended behaviour of the class;
2. Tests are harder to write and maintain; and
3. The resulting type cannot be used if any implemented superclass or interface changes.

This last issue is especially problematic for testing annotation processors, as the javax.lang.model interfaces change between Java versions. Instead, we create an abstract class containing only the methods with real behaviour, and create a concrete partial subclass of this dynamically at runtime. This requires javassist, as Proxy can only subclass interfaces.

Method Summary

Modifier and Type	Method and Description
static <T> T	of(java.lang.Class<T> cls, java.lang.Object... args) Constructs a partial instance of abstract type cls, passing args into its constructor.

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <T> T of(java.lang.Class<T> cls,
                       java.lang.Object... args)

Constructs a partial instance of abstract type cls, passing args into its constructor.

The returned object will throw an UnsupportedOperationException from any unimplemented methods.