class SortArrayTest

class SortArrayTest extends TestCase {
    
    /**
     * Tests SortArray::sortByWeightElement() input against expected output.
     *
     * @dataProvider providerSortByWeightElement
     * @covers ::sortByWeightElement
     * @covers ::sortByKeyInt
     *
     * @param array $a
     *   The first input array for the SortArray::sortByWeightElement() method.
     * @param array $b
     *   The second input array for the SortArray::sortByWeightElement().
     * @param int $expected
     *   The expected output from calling the method.
     */
    public function testSortByWeightElement($a, $b, $expected) {
        $result = SortArray::sortByWeightElement($a, $b);
        $this->assertBothNegativePositiveOrZero($expected, $result);
    }
    
    /**
     * Data provider for SortArray::sortByWeightElement().
     *
     * @return array
     *   An array of tests, matching the parameter inputs for
     *   testSortByWeightElement.
     *
     * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByWeightElement()
     */
    public function providerSortByWeightElement() {
        $tests = [];
        // Weights set and equal.
        $tests[] = [
            [
                'weight' => 1,
            ],
            [
                'weight' => 1,
            ],
            0,
        ];
        // Weights set and $a is less (lighter) than $b.
        $tests[] = [
            [
                'weight' => 1,
            ],
            [
                'weight' => 2,
            ],
            -1,
        ];
        // Weights set and $a is greater (heavier) than $b.
        $tests[] = [
            [
                'weight' => 2,
            ],
            [
                'weight' => 1,
            ],
            1,
        ];
        // Weights not set.
        $tests[] = [
            [],
            [],
            0,
        ];
        // Weights for $b not set.
        $tests[] = [
            [
                'weight' => 1,
            ],
            [],
            1,
        ];
        // Weights for $a not set.
        $tests[] = [
            [],
            [
                'weight' => 1,
            ],
            -1,
        ];
        return $tests;
    }
    
    /**
     * Tests SortArray::sortByWeightProperty() input against expected output.
     *
     * @dataProvider providerSortByWeightProperty
     * @covers ::sortByWeightProperty
     * @covers ::sortByKeyInt
     *
     * @param array $a
     *   The first input array for the SortArray::sortByWeightProperty() method.
     * @param array $b
     *   The second input array for the SortArray::sortByWeightProperty().
     * @param int $expected
     *   The expected output from calling the method.
     */
    public function testSortByWeightProperty($a, $b, $expected) {
        $result = SortArray::sortByWeightProperty($a, $b);
        $this->assertBothNegativePositiveOrZero($expected, $result);
    }
    
    /**
     * Data provider for SortArray::sortByWeightProperty().
     *
     * @return array
     *   An array of tests, matching the parameter inputs for
     *   testSortByWeightProperty.
     *
     * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByWeightProperty()
     */
    public function providerSortByWeightProperty() {
        $tests = [];
        // Weights set and equal.
        $tests[] = [
            [
                '#weight' => 1,
            ],
            [
                '#weight' => 1,
            ],
            0,
        ];
        // Weights set and $a is less (lighter) than $b.
        $tests[] = [
            [
                '#weight' => 1,
            ],
            [
                '#weight' => 2,
            ],
            -1,
        ];
        // Weights set and $a is greater (heavier) than $b.
        $tests[] = [
            [
                '#weight' => 2,
            ],
            [
                '#weight' => 1,
            ],
            1,
        ];
        // Weights not set.
        $tests[] = [
            [],
            [],
            0,
        ];
        // Weights for $b not set.
        $tests[] = [
            [
                '#weight' => 1,
            ],
            [],
            1,
        ];
        // Weights for $a not set.
        $tests[] = [
            [],
            [
                '#weight' => 1,
            ],
            -1,
        ];
        return $tests;
    }
    
    /**
     * Tests SortArray::sortByTitleElement() input against expected output.
     *
     * @dataProvider providerSortByTitleElement
     * @covers ::sortByTitleElement
     * @covers ::sortByKeyString
     *
     * @param array $a
     *   The first input item for comparison.
     * @param array $b
     *   The second item for comparison.
     * @param int $expected
     *   The expected output from calling the method.
     */
    public function testSortByTitleElement($a, $b, $expected) {
        $result = SortArray::sortByTitleElement($a, $b);
        $this->assertBothNegativePositiveOrZero($expected, $result);
    }
    
    /**
     * Data provider for SortArray::sortByTitleElement().
     *
     * @return array
     *   An array of tests, matching the parameter inputs for
     *   testSortByTitleElement.
     *
     * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByTitleElement()
     */
    public function providerSortByTitleElement() {
        $tests = [];
        // Titles set and equal.
        $tests[] = [
            [
                'title' => 'test',
            ],
            [
                'title' => 'test',
            ],
            0,
        ];
        // Title $a not set.
        $tests[] = [
            [],
            [
                'title' => 'test',
            ],
            -4,
        ];
        // Title $b not set.
        $tests[] = [
            [
                'title' => 'test',
            ],
            [],
            4,
        ];
        // Titles set but not equal.
        $tests[] = [
            [
                'title' => 'test',
            ],
            [
                'title' => 'testing',
            ],
            -1,
        ];
        // Titles set but not equal.
        $tests[] = [
            [
                'title' => 'testing',
            ],
            [
                'title' => 'test',
            ],
            1,
        ];
        return $tests;
    }
    
    /**
     * Tests SortArray::sortByTitleProperty() input against expected output.
     *
     * @dataProvider providerSortByTitleProperty
     * @covers ::sortByTitleProperty
     * @covers ::sortByKeyString
     *
     * @param array $a
     *   The first input item for comparison.
     * @param array $b
     *   The second item for comparison.
     * @param int $expected
     *   The expected output from calling the method.
     */
    public function testSortByTitleProperty($a, $b, $expected) {
        $result = SortArray::sortByTitleProperty($a, $b);
        $this->assertBothNegativePositiveOrZero($expected, $result);
    }
    
    /**
     * Data provider for SortArray::sortByTitleProperty().
     *
     * @return array
     *   An array of tests, matching the parameter inputs for
     *   testSortByTitleProperty.
     *
     * @see \Drupal\Tests\Component\Utility\SortArrayTest::testSortByTitleProperty()
     */
    public function providerSortByTitleProperty() {
        $tests = [];
        // Titles set and equal.
        $tests[] = [
            [
                '#title' => 'test',
            ],
            [
                '#title' => 'test',
            ],
            0,
        ];
        // Title $a not set.
        $tests[] = [
            [],
            [
                '#title' => 'test',
            ],
            -4,
        ];
        // Title $b not set.
        $tests[] = [
            [
                '#title' => 'test',
            ],
            [],
            4,
        ];
        // Titles set but not equal.
        $tests[] = [
            [
                '#title' => 'test',
            ],
            [
                '#title' => 'testing',
            ],
            -1,
        ];
        // Titles set but not equal.
        $tests[] = [
            [
                '#title' => 'testing',
            ],
            [
                '#title' => 'test',
            ],
            1,
        ];
        return $tests;
    }
    
    /**
     * Asserts that numbers are either both negative, both positive or both zero.
     *
     * The exact values returned by comparison functions differ between PHP
     * versions and are considered an "implementation detail".
     *
     * @param int $expected
     *   Expected comparison function return value.
     * @param int $result
     *   Actual comparison function return value.
     *
     * @internal
     */
    protected function assertBothNegativePositiveOrZero(int $expected, int $result) : void {
        $this->assertIsNumeric($expected);
        $this->assertIsNumeric($result);
        $message = "Numbers should be both negative, both positive or both zero. Expected: {$expected}, actual: {$result}";
        if ($expected > 0) {
            $this->assertGreaterThan(0, $result, $message);
        }
        elseif ($expected < 0) {
            $this->assertLessThan(0, $result, $message);
        }
        else {
            $this->assertEquals(0, $result, $message);
        }
    }

}