public function testLang_UseDefaultFormat() { $dateTime = $this->prophesize('DateTime'); $dateTime->format(DateTime::ISO8601)->willReturn("ISODATE"); $dateTime->format(DateTime::RFC2822)->willReturn("RFCDATE"); $this->assertEquals('<time datetime="ISODATE" data-format="lll">RFCDATE</time>', Lang::formatDateTime($dateTime->reveal())); }