public function testGetSetWhichDaysDoYouDrink() { $expected = 'Mon, Tues, Wed'; $this->assertEmpty($this->instance->getWhichDaysDoYouDrink()); $this->assertInstanceOf(Drinking::class, $this->instance->setWhichDaysDoYouDrink($expected)); $this->assertEquals($expected, $this->instance->getWhichDaysDoYouDrink()); }