Merge pull request #5667 from mohamedawnallah/unitTestTemplateUtil

operator/pkg/util: unit test template

operator/pkg/util/template_test.go

@@ -0,0 +1,82 @@
+/*
+Copyright 2024 The Karmada Authors.
+
+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 util
+
+import (
+ "bytes"
+ "strings"
+ "testing"
+)
+
+func TestParseTemplate(t *testing.T) {
+ tests := []struct {
+ name string
+ template string
+ args interface{}
+ want []byte
+ wantErr bool
+ errMsg string
+ }{
+ {
+ name: "ParseTemplate_WithMissingVariable_ParsingFailed",
+ template: "Hello, {{.Name}}!",
+ args: struct{ Missing string }{Missing: "World"},
+ want: nil,
+ wantErr: true,
+ errMsg: "error when executing template",
+ },
+ {
+ name: "ParseTemplate_WithInvalidTemplateSyntax_ParsingFailed",
+ template: "Hello, {{.Name!",
+ args: struct{ Name string }{Name: "World"},
+ want: nil,
+ wantErr: true,
+ errMsg: "error when parsing template",
+ },
+ {
+ name: "ParseTemplate_ValidTemplateWithVariable_ParsingSucceeded",
+ template: "Hello, {{.Name}}!",
+ args: struct{ Name string }{Name: "World"},
+ want: []byte("Hello, World!"),
+ wantErr: false,
+ },
+ {
+ name: "ParseTemplate_EmptyTemplate_ParsingSucceeded",
+ template: "",
+ args: nil,
+ want: []byte(""),
+ wantErr: false,
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ got, err := ParseTemplate(test.template, test.args)
+ if err == nil && test.wantErr {
+ t.Errorf("expected an error, but got none")
+ }
+ if err != nil && !test.wantErr {
+ t.Errorf("unexpected error, got: %v", err)
+ }
+ if err != nil && test.wantErr && !strings.Contains(err.Error(), test.errMsg) {
+ t.Errorf("expected error message %s to be in %s", test.errMsg, err.Error())
+ }
+ if !bytes.Equal(got, test.want) {
+ t.Errorf("expected parsed template bytes to be %v, but got %v", test.want, got)
+ }
+ })
+ }
+}