Fix compare different node tag

what-changed/model/comparison_functions_test.go

@@ -0,0 +1,50 @@
+// Copyright 2022 Hugo Stijns
+// SPDX-License-Identifier: MIT
+
+package model
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+)
+
+func Test_CheckForModification(t *testing.T) {
+	tests := []struct {
+		name   string
+		left   string
+		right  string
+		differ bool
+	}{
+		{"Same string quoted", `value`, `"value"`, false},
+		{"Same string", `value`, `value`, false},
+		{"Same boolean", `true`, `true`, false},
+		{"Different boolean", `true`, `false`, true},
+		{"Different string", `value_a`, `value_b`, true},
+		{"Different int", `123`, `"123"`, true},
+		{"Different float", `123.456`, `"123.456"`, true},
+		{"Different boolean quoted", `true`, `"true"`, true},
+		{"Different date", `2022-12-29`, `"2022-12-29"`, true},
+		{"Different value and tag", `2.0`, `2.0.0`, true},
+		{"From null to empty value", `null`, `""`, false},
+		{"From empty value to null", `""`, `null`, false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var lNode, rNode yaml.Node
+			_ = yaml.Unmarshal([]byte(tt.left), &lNode)
+			_ = yaml.Unmarshal([]byte(tt.right), &rNode)
+
+			changes := []*Change{}
+			CheckForModification(lNode.Content[0], rNode.Content[0], "test", &changes, false, "old", "new")
+
+			if tt.differ {
+				assert.Len(t, changes, 1)
+			} else {
+				assert.Empty(t, changes)
+			}
+		})
+	}
+}