/** * @covers ::__toString * @covers ::jsonSerialize */ public function testToString() { $string = 'Can I please have a @replacement'; $formattable_string = new FormattableMarkup($string, ['@replacement' => 'kitten']); $text = (string) $formattable_string; $this->assertEquals('Can I please have a kitten', $text); $text = $formattable_string->jsonSerialize(); $this->assertEquals('Can I please have a kitten', $text); }