public function testTokenize() { $res = Utility::tokenize(''); $this->assertSame([], $res); $res = Utility::tokenize('some'); $this->assertSame(['some'], $res); $res = Utility::tokenize('some, thing'); $this->assertSame(['some', 'thing'], $res); $res = Utility::tokenize(',some,,, ,, thing,'); $this->assertSame(['some', 'thing'], array_values($res)); }