function testGetCopy() { //Arrange $copy_id = 1; $test_copy = new Copy($copy_id); $test_copy->save(); $copy_id2 = 2; $id2 = 2; $test_copy2 = new Copy($copy_id2); $test_copy2->save(); $name = "Ping Pong"; $id2 = 1; $test_patron = new Patron($name); $test_patron->save(); //Act $test_patron->addCopy($test_copy->getId()); $test_patron->addCopy($test_copy2->getId()); //Assert $this->assertEquals($test_patron->getCopy(), [$test_copy, $test_copy2]); }