Extension\MCallTest::testOptionalParameterString PHP Method

    public function testOptionalParameterString()
    {
        $t = new Mcall();
        $this->assertSame($t->optionalParameterString('test'), 'test');
        $this->assertSame($t->optionalParameterString(), 'test string');
        $this->assertSame($t->optionalParameterStringNull(), '');
    }