The document defines a fib function that recursively calculates Fibonacci numbers and prints the 10th Fibonacci number. It then defines some unit tests for a Calculator class that test the add method by asserting the expected result. Finally, it defines some unit tests for a User class that test validating a user object.Read less
![PHPUnit でよりよくテストを書くために](https://cdn-ak-scissors.b.st-hatena.com/image/square/1aeada231ead43d01a455d8cef06525a0cfbe6fa/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Fphpunit-111001001029-phpapp02-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)