github.com/letsencrypt/trillian@v1.1.2-0.20180615153820-ae375a99d36a/testonly/errors.go (about) 1 // Copyright 2016 Google Inc. All Rights Reserved. 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 package testonly 16 17 import ( 18 "strings" 19 "testing" 20 ) 21 22 // EnsureErrorContains checks that an error contains a specific substring and fails a 23 // test with a fatal if it does not or the error was nil. 24 func EnsureErrorContains(t *testing.T, err error, s string) { 25 if err == nil { 26 t.Fatalf("%s operation unexpectedly succeeded", s) 27 } 28 29 if !strings.Contains(err.Error(), s) { 30 t.Fatalf("Got the wrong type of error: %v", err) 31 } 32 }