PHPUnit の始め方について語りあう PHP TechCafe

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StackTest extends TestCase
{
    private $stack;

    protected function setUp(): void
    {
        $this->stack = [];
    }

    public function testEmpty(): void
    {
        $this->assertTrue(empty($this->stack));
    }
}

$this->assertSame('hoge', 'hoge'); // OK
$this->assertSame('hoge', 'fuga'); // NG

$this->assertSame(0, 0);           // OK
$this->assertSame(0, false);       // NG

$flag = FALSE;
$this->assertTrue($flag);
$this->assertSame(TRUE, $flag);

# assertTrueのメッセージ
Failed asserting that false is true.

# assertSameのメッセージ
Failed asserting that false is identical to true.

<?php
use PHPUnit\Framework\TestCase;

class DataTest extends TestCase
{
    /**
     * @dataProvider additionProvider
     */
    public function testAdd($a, $b, $expected)
    {
        $this->assertEquals($expected, $a + $b);
    }

    public function additionProvider()
    {
        return [
            [0, 0, 0],
            [0, 1, 1],
            [1, 0, 1],
            [1, 1, 3]
        ];
    }
}
?>

@depends + "テストメソッド名"

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StackTest extends TestCase
{
    public function testEmpty(): array
    {
        $stack = [];
        $this->assertEmpty($stack);

        return $stack;
    }

    /**
     * @depends testEmpty
     */
    public function testPush(array $stack): array
    {
        array_push($stack, 'foo');
        $this->assertSame('foo', $stack[count($stack)-1]);
        $this->assertNotEmpty($stack);

        return $stack;
    }

    /**
     * @depends testPush
     */
    public function testPop(array $stack): void
    {
        $this->assertSame('foo', array_pop($stack));
        $this->assertEmpty($stack);
    }
}

$ vendor/bin/phpunit Test.php
PHPUnit 7.4.5 by Sebastian Bergmann and contributors.

....                                            4 / 4 (100%)

Time: 87 ms, Memory: 4.00 MB

OK (4 tests, 10 assertions)

  /**
   * @depends testSided
   */
  public function testRoll($dice){
    $dice->roll();
    $this->assertTrue(1 <= $dice->getNumber() 
      && 0 >= $dice->getNumber()); // 6 だったものを 0 に書き換え
  }

$ vendor/bin/phpunit Test.php
PHPUnit 7.4.5 by Sebastian Bergmann and contributors.

...F                                            4 / 4 (100%)

Time: 78 ms, Memory: 4.00 MB

There was 1 failure:

1) Test::testRoll
Failed asserting that false is true.

/var/www/html/Test.php:40

FAILURES!
Tests: 4, Assertions: 10, Failures: 1.