function AttributeTest::testAddClasses

Tests adding class attributes with the AttributeArray helper method. @covers ::addClass

File

core/tests/Drupal/Tests/Core/Template/AttributeTest.php, line 150

Class

AttributeTest

@coversDefaultClass \Drupal\Core\Template\Attribute @group Template

Namespace

Code

public function testAddClasses() : void {
    // Add empty Attribute object with no classes.
    $attribute = new Attribute();
    // Add no class on empty attribute.
    $attribute->addClass();
    $this->assertEmpty($attribute['class']);
    // Test various permutations of adding values to empty Attribute objects.
    foreach ([
        NULL,
        FALSE,
        '',
        [],
    ] as $value) {
        // Single value.
        $attribute->addClass($value);
        $this->assertEmpty((string) $attribute);
        // Multiple values.
        $attribute->addClass($value, $value);
        $this->assertEmpty((string) $attribute);
        // Single value in array.
        $attribute->addClass([
            $value,
        ]);
        $this->assertEmpty((string) $attribute);
        // Single value in arrays.
        $attribute->addClass([
            $value,
        ], [
            $value,
        ]);
        $this->assertEmpty((string) $attribute);
    }
    // Add one class on empty attribute.
    $attribute->addClass('banana');
    $this->assertEquals([
        'banana',
    ], $attribute['class']->value());
    // Add one class.
    $attribute->addClass('aa');
    $this->assertEquals([
        'banana',
        'aa',
    ], $attribute['class']->value());
    // Add multiple classes.
    $attribute->addClass('xx', 'yy');
    $this->assertEquals([
        'banana',
        'aa',
        'xx',
        'yy',
    ], $attribute['class']->value());
    // Add an array of classes.
    $attribute->addClass([
        'red',
        'green',
        'blue',
    ]);
    $this->assertEquals([
        'banana',
        'aa',
        'xx',
        'yy',
        'red',
        'green',
        'blue',
    ], $attribute['class']->value());
    // Add an array of duplicate classes.
    $attribute->addClass([
        'red',
        'green',
        'blue',
    ], [
        'aa',
        'aa',
        'banana',
    ], 'yy');
    $this->assertEquals('banana aa xx yy red green blue', (string) $attribute['class']);
}