105-insert.t pass without doing anything.

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Fails correctly.

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Create empty _insert()

* pass

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Progress; more tests.

* null case passes correctly
* Joe passes in the wrong way
* Freddy fails wrongly

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Still failing to write a test that fails.

* Module code still does nothing!

Signed-off-by: Xiong Changnian <xiong@cpan.org>
Finally a test that can't be ducked.

Signed-off-by: Xiong Changnian <xiong@cpan.org>