isA is not an equivalent to is(instanceOf())

[jonas-l]

isA() method currently accepts parameter of type Class<T> instead of Class<?>.

The following example fails to compile:

Object cheese = new Cheddar();
assertThat(cheese, isA(Cheddar.class));

while one with instanceOf() succeeds:

Object cheese = new Cheddar();
assertThat(cheese, is(instanceOf(Cheddar.class)));

[sf105]

The isA method is intended to be used for plugging into type-checked expressions, such as jmock expectations, or where people want to use type checking as an early warning. instanceOf is where the constraint needs to be more forgiving. In a world with a better type system we probably wouldn't need both.

[jonas-l]

It looks like this is actually a duplicate of #27 and is still valid. Furthermore, the isA comment states it's a shortcut for is(instanceOf()) but that's not true.