TDD(テスト駆動開発)でFizzBuzz問題を解いてみる ref: http://qiita.com/masayuki5160/items/3e1c282eed91188699f1

file0.php

<?php

require_once __DIR__. '/fizzBuzz.php';

class testFizzBuzz extends PHPUnit_Framework_TestCase
{
    private $fizzBuzz;

    public function setUp()
    {
        $this->fizzBuzz = new fizzBuzz();
    }

    public function testFizz()
    {
        $input = 3;
        $expected = "Fizz";
        $this->assertEquals($this->fizzBuzz->judge($input), $expected);
    }

    public function testBuzz()
    {
        $input = 5;
        $expected = "Buzz";
        $this->assertEquals($this->fizzBuzz->judge($input), $expected);
    }

    public function testFizzAndBuzz()
    {
        $input = 15;
        $expected = "FizzBuzz";
        $this->assertEquals($this->fizzBuzz->judge($input), $expected);
    }
}

file1.php

<?php

class fizzBuzz
{
    public function judge($input)
    {
        $result = $input;
        if($input % 3 == 0 && $input % 5 == 0){
            $result = "FizzBuzz";
        }elseif($input % 3 == 0){
            $result = "Fizz";
        }elseif($input % 5 == 0){
            $result = "Buzz";
        }

        return $result;
    }
}

file2.php

<?php

require_once __DIR__. '/fizzBuzz.php';

class testFizzBuzz extends PHPUnit_Framework_TestCase
{
    private $fizzBuzz;

    public function setUp()
    {
        $this->fizzBuzz = new fizzBuzz();
    }

    public function testResult()
    {
        $this->assertEquals($this->fizzBuzz->judge(3),  "Fizz");
        $this->assertEquals($this->fizzBuzz->judge(9),  "Fizz");
        $this->assertEquals($this->fizzBuzz->judge(10), "Buzz");
        $this->assertEquals($this->fizzBuzz->judge(50), "Buzz");
        $this->assertEquals($this->fizzBuzz->judge(70), "Buzz");
        $this->assertEquals($this->fizzBuzz->judge(90), "FizzBuzz");
        $this->assertEquals($this->fizzBuzz->judge(97), 97);
    }
}

file3.php

<?php

require_once __DIR__. '/fizzBuzz.php';

class testFizzBuzz extends PHPUnit_Framework_TestCase
{
    private $fizzBuzz;

    public function setUp()
    {
        $this->fizzBuzz = new fizzBuzz();
    }

    /**
     * @dataProvider fizzProvider
     */
    public function testFizz($input)
    {
        $this->assertEquals('Fizz', $this->fizzBuzz->testFizzBuzz($input));
    }

    public function fizzProvider()
    {
        return [[3],[9],[33]];
    }

    /**
     * @dataProvider buzzProvider
     */
    public function testBuzz($input)
    {
        $this->assertEquals('Buzz', $this->fizzBuzz->testFizzBuzz($input));
    }

    public function buzzProvider()
    {
        return [[5],[10],[100]];
    }

    /**
     * @dataProvider fizzAndBuzzProvider
     */
    public function testFizzAndBuzz($input)
    {
        $this->assertEquals('FizzBuzz', $this->fizzBuzz->testFizzBuzz($input));
    }

    public function fizzAndBuzzProvider()
    {
        return [[15], [45], [60]];
    }

    /**
     * @dataProvider notFizzBuzzProvider
     */
    public function testNotFizzBuzz($input)
    {
        $this->assertEquals($input, $this->fizzBuzz->testFizzBuzz($input));
    }

    public function notFizzBuzzProvider()
    {
        return [[7], [11], [98]];
    }

}

file4.php

<?php

class fizzBuzz
{
    public function testFizzBuzz($input)
    {
        $res = $input;
        if($input % 3 == 0 && $input % 5 == 0)
        {
            $res = "FizzBuzz";
        }elseif($input % 3 == 0)
        {
            $res = "Fizz";
        }elseif($input % 5 == 0)
        {
            $res = "Buzz";
        }

        return $res;
    }
}