/** * @test */ public function shouldAppendSuffixIfNecessary() { // when $modified = Strings::appendIfMissing('You know nothing, Jon Snow', ', Jon Snow'); $original = Strings::appendIfMissing('You know nothing', ', Jon Snow'); // then $this->assertEquals($original, 'You know nothing, Jon Snow'); $this->assertEquals($modified, 'You know nothing, Jon Snow'); }