mirror of https://github.com/helm/helm
Signed-off-by: Michał Słapek <28485371+mslapek@users.noreply.github.com>pull/12091/head
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/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package chartutil
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func copyMap(src map[string]interface{}) map[string]interface{} {
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m := make(map[string]interface{}, len(src))
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for k, v := range src {
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m[k] = v
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}
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return m
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}
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// stringCollectionsDeepCopy makes deep copy for string maps and lists.
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// For other types performs shallow copy.
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func stringCollectionsDeepCopy(src any) any {
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switch t := src.(type) {
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case map[string]any:
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r := make(map[string]interface{}, len(t))
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for k, v := range t {
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r[k] = stringCollectionsDeepCopy(v)
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}
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return r
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case []string:
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r := make([]string, len(t))
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copy(r, t)
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return r
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default:
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return t
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}
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}
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@ -0,0 +1,129 @@
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/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package chartutil
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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type Foo struct {
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Bar int
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Ipsum []string
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}
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func makeExample() any {
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return map[string]any{
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"ab": []string{"hello", "world"},
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"bc": "qwerty",
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"cd": &Foo{1000, []string{"blue", "red"}},
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"nested": map[string]any{
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"alpha": 5,
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},
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"nums": []int{3, 5, 7},
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"nums map": map[string]int{
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"a": 2,
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"b": 4,
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},
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}
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}
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func TestStringCollectionsDeepCopy(t *testing.T) {
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tests := []struct {
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name string
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factory func() any
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}{
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{
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"nil",
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func() any { return nil },
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},
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{
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"[]string",
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func() any { return []string{"hello", "world"} },
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},
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{
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"[]int",
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func() any { return []int{2, 4, 6} },
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},
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{
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"map[string]any",
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func() any {
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return map[string]any{
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"ab": []string{"hello", "world"},
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"bc": "qwerty",
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}
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},
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},
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{
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"custom type",
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func() any {
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return Foo{1000, []string{"blue", "red"}}
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},
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},
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{
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"map[string]any with custom type",
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func() any {
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return map[string]any{
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"ab": []string{"hello", "world"},
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"bc": "qwerty",
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"cd": Foo{1000, []string{"blue", "red"}},
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}
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},
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},
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{
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"complex example", makeExample,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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src := tt.factory()
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got := stringCollectionsDeepCopy(src)
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assert.Equal(t, tt.factory(), got)
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})
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}
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}
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func TestStringCollectionsDeepCopyAliasing(t *testing.T) {
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is := assert.New(t)
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src := makeExample().(map[string]any)
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got := stringCollectionsDeepCopy(src).(map[string]any)
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got["ab"].([]string)[1] = "globe"
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is.Equal("world", src["ab"].([]string)[1])
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got["bc"] = "quartz"
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is.Equal("qwerty", src["bc"])
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got["nested"].(map[string]any)["alpha"] = "9"
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is.Equal(5, src["nested"].(map[string]any)["alpha"])
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// notice, that Foo is not deep copied
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got["cd"].(*Foo).Bar = 500
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got["cd"].(*Foo).Ipsum[0] = "green"
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is.Equal(500, src["cd"].(*Foo).Bar)
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is.Equal("green", src["cd"].(*Foo).Ipsum[0])
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// non-any collections are not deep copied
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got["nums"].([]int)[1] = 10
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is.Equal(10, src["nums"].([]int)[1])
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got["nums map"].(map[string]int)["b"] = 10
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is.Equal(10, src["nums map"].(map[string]int)["b"])
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}
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