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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * Copyright (c) 2022, MegaEase | ||
| * All rights reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package monkey | ||
|
|
||
| import ( | ||
| "reflect" | ||
|
|
||
| "github.com/agiledragon/gomonkey/v2" | ||
| ) | ||
|
|
||
| var patchesMap = make(map[string]*gomonkey.Patches) | ||
|
|
||
| // Patch replaces a function with another | ||
| func Patch(target, replacement interface{}) *gomonkey.Patches { | ||
| key := reflect.TypeOf(target).String() | ||
| existingPatches, ok := patchesMap[key] | ||
| if ok { | ||
| existingPatches.Reset() | ||
| } | ||
| patches := gomonkey.ApplyFunc(target, replacement) | ||
| patchesMap[key] = patches | ||
| return patches | ||
| } | ||
|
|
||
| // Unpatch unpatch a patch | ||
| func Unpatch(target interface{}) bool { | ||
| patches, ok := patchesMap[reflect.TypeOf(target).String()] | ||
| if !ok { | ||
| return false | ||
| } | ||
| patches.Reset() | ||
| delete(patchesMap, reflect.TypeOf(target).String()) | ||
| return true | ||
| } | ||
|
|
||
| // PatchInstanceMethod replaces an instance method methodName for the type target with replacement | ||
| func PatchInstanceMethod(target reflect.Type, methodName string, replacement interface{}) *gomonkey.Patches { | ||
| key := target.String() + methodName | ||
| existingPatches, ok := patchesMap[key] | ||
| if ok { | ||
| existingPatches.Reset() | ||
| } | ||
| patches := gomonkey.ApplyMethod(target, methodName, replacement) | ||
| patchesMap[key] = patches | ||
| return patches | ||
| } | ||
|
|
||
| // UnpatchInstanceMethod unpatch a patch | ||
| func UnpatchInstanceMethod(target reflect.Type, methodName string) bool { | ||
| patches, ok := patchesMap[target.String()+methodName] | ||
| if !ok { | ||
| return false | ||
| } | ||
| patches.Reset() | ||
| delete(patchesMap, target.String()+methodName) | ||
| return true | ||
| } | ||
|
|
||
| // UnpatchAll unpatch all patches | ||
| func UnpatchAll() { | ||
| for _, patches := range patchesMap { | ||
| patches.Reset() | ||
| } | ||
| patchesMap = make(map[string]*gomonkey.Patches) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * Copyright (c) 2022, MegaEase | ||
| * All rights reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package monkey | ||
|
|
||
| import ( | ||
| "reflect" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| type MyStruct struct{} | ||
|
|
||
| func (s *MyStruct) Method() string { | ||
| return "original" | ||
| } | ||
|
|
||
| func TestPatch(t *testing.T) { | ||
| originalFunc := func() string { return "original" } | ||
| replacementFunc := func() string { return "replacement" } | ||
|
|
||
| patch := Patch(originalFunc, replacementFunc) | ||
| defer patch.Reset() | ||
|
|
||
| assert.Equal(t, "replacement", originalFunc()) | ||
| } | ||
|
|
||
| func TestUnpatch(t *testing.T) { | ||
| originalFunc := func() string { return "original" } | ||
| replacementFunc := func() string { return "replacement" } | ||
|
|
||
| Patch(originalFunc, replacementFunc) | ||
| Unpatch(originalFunc) | ||
|
|
||
| assert.Equal(t, "original", originalFunc()) | ||
| } | ||
|
|
||
| func TestPatchInstanceMethod(t *testing.T) { | ||
| PatchInstanceMethod(reflect.TypeOf(&MyStruct{}), "Method", func(*MyStruct) string { return "replacement" }) | ||
| defer UnpatchInstanceMethod(reflect.TypeOf(&MyStruct{}), "Method") | ||
|
|
||
| assert.Equal(t, "replacement", (&MyStruct{}).Method()) | ||
| } | ||
|
|
||
| func TestUnpatchInstanceMethod(t *testing.T) { | ||
| PatchInstanceMethod(reflect.TypeOf(&MyStruct{}), "Method", func(*MyStruct) string { return "replacement" }) | ||
| UnpatchInstanceMethod(reflect.TypeOf(&MyStruct{}), "Method") | ||
|
|
||
| assert.Equal(t, "original", (&MyStruct{}).Method()) | ||
| } | ||
|
|
||
| func TestUnpatchAll(t *testing.T) { | ||
| originalFunc := func() string { return "original" } | ||
| replacementFunc := func() string { return "replacement" } | ||
|
|
||
| Patch(originalFunc, replacementFunc) | ||
| PatchInstanceMethod(reflect.TypeOf(&MyStruct{}), "Method", func(*MyStruct) string { return "replacement" }) | ||
| UnpatchAll() | ||
|
|
||
| assert.Equal(t, "original", originalFunc()) | ||
| assert.Equal(t, "original", (&MyStruct{}).Method()) | ||
| } |
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