function DiffEngineTest::testDiffInfiniteLoop

Tests that two files can be successfully diffed.

@covers ::diff

File

core/tests/Drupal/Tests/Component/Diff/Engine/DiffEngineTest.php, line 94

Class

DiffEngineTest

Test DiffEngine class.

Namespace

Code

public function testDiffInfiniteLoop() {
    $from = explode("\n", file_get_contents(__DIR__ . '/fixtures/file1.txt'));
    $to = explode("\n", file_get_contents(__DIR__ . '/fixtures/file2.txt'));
    $diff_engine = new DiffEngine();
    $diff = $diff_engine->diff($from, $to);
    $this->assertCount(4, $diff);
    $this->assertEquals($diff[0], new DiffOpDelete([
        '    - image.style.max_650x650',
    ]));
    $this->assertEquals($diff[1], new DiffOpCopy([
        '    - image.style.max_325x325',
    ]));
    $this->assertEquals($diff[2], new DiffOpAdd([
        '    - image.style.max_650x650',
        '_core:',
        '  default_config_hash: 3mjM9p-kQ8syzH7N8T0L9OnCJDSPvHAZoi3q6jcXJKM',
    ]));
    $this->assertEquals($diff[3], new DiffOpCopy([
        'fallback_image_style: max_325x325',
        '',
    ]));
}