xref: /aosp_15_r20/external/tink/go/mac/internal/mactest/mactest_test.go (revision e7b1675dde1b92d52ec075b0a92829627f2c52a5)
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