public function TextUtilityTest::testOffsetArgument in Image Effects 8

Same name and namespace in other branches

1. 8.3 tests/src/Unit/TextUtilityTest.php \Drupal\Tests\image_effects\Unit\TextUtilityTest::testOffsetArgument()
2. 8.2 tests/src/Unit/TextUtilityTest.php \Drupal\Tests\image_effects\Unit\TextUtilityTest::testOffsetArgument()

Performs the tests for the offset argument.

File

tests/src/Unit/TextUtilityTest.php, line 18

Class

TextUtilityTest

Tests the UTF-8 character-based wrapper of the preg_match function.

Namespace

Drupal\Tests\image_effects\Unit

Code

public function testOffsetArgument() {
  $matches = [];

  // Character 'п' is 2 bytes long and preg_match() would start from the
  // second 'п' character and not from the first 'z'.
  $result = TextUtility::unicodePregMatch('/п/u', 'ппzz', $matches, NULL, 2);
  $this
    ->assertEquals(0, $result, 'String was skipped using character-based offset.');

  // Again, character 'п' is 2 bytes long and we skip 1 character, so
  // preg_match() would fail, because the string with byte offset 1 is not a
  // valid UTF-8 string.
  $result = TextUtility::unicodePregMatch('/.*$/u', 'пzz', $matches, NULL, 1);
  $this
    ->assertTrue($result && $matches[0] === 'zz', 'String was matched using character-based offset.');
}