1// Copyright 2022 Google LLC 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14// 15//////////////////////////////////////////////////////////////////////////////// 16 17package mactest_test 18 19import ( 20 "errors" 21 "testing" 22 23 "github.com/google/tink/go/mac/internal/mactest" 24) 25 26func TestAlwaysFailingMACAlwayFails(t *testing.T) { 27 wantErr := errors.New("panic at the kernel") 28 p := &mactest.AlwaysFailingMAC{Error: wantErr} 29 if _, err := p.ComputeMAC([]byte("valid_data")); !errors.Is(err, wantErr) { 30 t.Errorf("p.ComputeMac() err = %v, want %v", err, wantErr) 31 } 32 if err := p.VerifyMAC([]byte("data"), []byte("tag")); !errors.Is(err, wantErr) { 33 t.Errorf("p.VerifyMac() err = %v, want %v", err, wantErr) 34 } 35} 36