luyatests\core\TagParserTest::testInjectTag PHP Method

    public function testInjectTag()
    {
        TagParser::inject('foo', ['class' => LinkTag::class]);
        $tags = TagParser::getInstantiatedTagObjects();
        $this->arrayHasKey('foo', $tags);
        $this->assertInstanceOf('luya\\tag\\tags\\LinkTag', $tags['foo']);
    }