if !reflect.DeepEqual(testCase.expectedResult, result) {
			t.Fatalf("test %v: result: expected: %v, got: %v", i+1, testCase.expectedResult, result)
		}
	}
}

func TestTargetIDSetDifference(t *testing.T) {
	testCases := []struct {
		set            TargetIDSet
		setToRemove    TargetIDSet
		expectedResult TargetIDSet
	}{
		{NewTargetIDSet(), NewTargetIDSet(), NewTargetIDSet()},