PHP's reflection mechanism is weird: reflecting on a private method will
find it even if it's defined in a parent class, while reflecting on a
private property just fails.
It would likely be more useful if TestingAccessWrapper could find
private properties defined in parent classes, so let's make that happen.
Change-Id: I9cfdde2694136d0e4559cc419a528762ea14ae4b
The new TestingAccessWrapper class provides a convenient way to make
all of an object's methods and properties public.
TODO: We should organize test helpers into a source directory. Note that the
helper and its test are in the same directory.
Change-Id: I958d55df18c74e9d2b25d98cd0316989a0fbbe6f
