This project was designed with TDD .

Notary.js provide judge method to tell user the result

If we want to balance the effort and confidence, how many tests we need to make for Notary judge method ? please have a look at three ways below, and I believe you will get the answer by yourself.

1. Exhaustive, so that we need to have 15 tests, because 3A1B is not exist.
2. Edge + Normal, so that we need 0A4B, 4A0B, 0A0B, 2A2B, so the number is 4
3. Orthogonal decomposition, which looks like below, and what we can see is there are 6 tests we need to cover

Position\Number	Totally Equal	Partially Equal	Totally not Equal
Totally Equal	4A0B	NOT EXIST	NOT EXIST
Partially Equal	2A2B	2A0B	NOT EXIST
Totally not Equal	0A4B	0A2B	0A0B

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Dealer.js is an random generator for the card

The requirement is we can generate a string which contains 4 different number in the range 1 - 9.

It seems it's impossible to test a random string, but we can find some key words to test.

1. the number in the string is different
2. the string length is 4
3. the number in the range 1 - 9

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GameCenter.js is the playground for our game

There are 6 lives by default for each round, so we need to cover stages blow:

1. get the right answer at the first time
2. run out of lives
3. got lives to continue

The rest thing we need to do is the UI part, and we want to make it as Conversation UI.

Ready Go! Have Fun!