Domain\Student\StudentTest::test_create_student_with_classroom PHP Method

    public function test_create_student_with_classroom()
    {
        $classroom = factory(Classroom::class)->create();
        $student = factory(Student::class)->create();
        $student->classrooms()->attach($classroom);
        $this->assertInstanceOf(Classroom::class, $student->classrooms->first());
    }