@Test(expected = ExecutionException.class)
public void executionExceptionThrownIfClassCannotBeInstantiatedWithNoArgs() throws Exception {
FieldBinder unit = new FieldBinder(TestClass.class.getDeclaredField("argsRequired"));
TestClass target = new TestClass();
unit.createAndBind(target);
}
@Test(expected = ExecutionException.class)
public void executionExceptionThrownIfFieldReprivatised() throws Exception {
Field f = TestClass.class.getDeclaredField("privateConstructor");
FieldBinder unit = new FieldBinder(f);
TestClass target = new TestClass();
f.setAccessible(false);
unit.createAndBind(target);
}
@Test
public void createAndBindCreatesANewInstanceAndBindsItToTheField() throws Exception {
FieldBinder unit = new FieldBinder(TestClass.class.getDeclaredField("another"));
TestClass target = new TestClass();
Object binding = unit.createAndBind(target);
assertThat(binding, instanceOf(AnotherClass.class));
assertThat(target.another, is(sameInstance(binding)));
}
