github.com/cloudfoundry/libcfbuildpack@v1.91.23/test/have_profile.go (about) 1 /* 2 * Copyright 2018-2020 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * https://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package test 18 19 import ( 20 "fmt" 21 "io/ioutil" 22 "path/filepath" 23 "reflect" 24 25 "github.com/onsi/gomega/types" 26 ) 27 28 // HaveProfile tests that a layer has a profile.d file with the expected content. 29 func HaveProfile(name string, format string, args ...interface{}) types.GomegaMatcher { 30 return &haveProfileMatcher{ 31 name, 32 fmt.Sprintf(format, args...), 33 } 34 } 35 36 type haveProfileMatcher struct { 37 name string 38 expected string 39 } 40 41 func (m *haveProfileMatcher) Match(actual interface{}) (bool, error) { 42 path, err := m.path(actual, m.name) 43 if err != nil { 44 return false, err 45 } 46 47 b, err := ioutil.ReadFile(path) 48 if err != nil { 49 return false, fmt.Errorf("failed to read file: %s", err.Error()) 50 } 51 52 return string(b) == m.expected, nil 53 } 54 55 func (m *haveProfileMatcher) FailureMessage(actual interface{}) string { 56 return fmt.Sprintf("Expected\n\t%#v\nto have layer profile %#v\n\t%#v", actual, m.name, m.expected) 57 } 58 59 func (m *haveProfileMatcher) NegatedFailureMessage(actual interface{}) string { 60 return fmt.Sprintf("Expected\n\t%#v\nnot to have layer profile %#v\n\t%#v", actual, m.name, m.expected) 61 } 62 63 func (m *haveProfileMatcher) path(actual interface{}, name string) (string, error) { 64 v := reflect.ValueOf(actual).FieldByName("Root") 65 if v == (reflect.Value{}) { 66 return "", fmt.Errorf("HaveProfile matcher expects a layer") 67 } 68 69 return filepath.Join(v.Interface().(string), "profile.d", name), nil 70 }