Function TestMaterializeIteratorErrorAbort

graph/iterator/materialize_test.go:42–76

(t *testing.T)

}

func TestMaterializeIteratorErrorAbort(t *testing.T) {
	ctx := context.TODO()
	wantErr := errors.New("unique")
	errIt := newTestIterator(false, wantErr)

	// This tests that we properly return 0 results and the error when the
	// underlying iterator is larger than our 'abort at' value, and then
	// returns an error.
	or := NewOr(
		newInt64(1, int64(MaterializeLimit+1), true),
		errIt,
	)

	mIt := NewMaterialize(or)

	// We should get all the underlying values...
	for i := 0; i < MaterializeLimit+1; i++ {
		if !mIt.Next(ctx) {
			t.Errorf("Materialize iterator returned spurious 'false' on iteration %d", i)
			return
		}
		if mIt.Err() != nil {
			t.Errorf("Materialize iterator returned non-nil Err on iteration %d", i)
			return
		}
	}

	// ... and then the error value.
	if mIt.Next(ctx) != false {
		t.Errorf("Materialize iterator did not pass through underlying 'false'")
	}
	if mIt.Err() != wantErr {
		t.Errorf("Materialize iterator did not pass through underlying Err")
	}
}