Config UI: keep mqtt and influx secrets on edit (#19956)

server/http_global_settings_handler_test.go

@@ -0,0 +1,62 @@
+package server
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMergeSettings(t *testing.T) {
+	tests := []struct {
+		old      any
+		new      *RedactedStruct
+		expected *RedactedStruct
+	}{
+		{
+			old:      nil,
+			new:      &RedactedStruct{"newValue1", 42},
+			expected: &RedactedStruct{"newValue1", 42},
+		},
+		{
+			old:      &TestStruct{"oldValue1", 24},
+			new:      &RedactedStruct{"newValue1", 42},
+			expected: &RedactedStruct{"newValue1", 42},
+		},
+		{
+			old:      &RedactedStruct{"oldValue1", 24},
+			new:      &RedactedStruct{"redacted", 42},
+			expected: &RedactedStruct{"oldValue1", 42},
+		},
+		{
+			old:      &RedactedStruct{"oldValue1", 24},
+			new:      &RedactedStruct{"newValue1", 42},
+			expected: &RedactedStruct{"newValue1", 42},
+		},
+	}
+
+	for _, tc := range tests {
+		mergeSettings(tc.old, tc.new)
+		assert.Equal(t, tc.expected.Field1, tc.new.Field1)
+		assert.Equal(t, tc.expected.Field2, tc.new.Field2)
+	}
+}
+
+type TestStruct struct {
+	Field1 string
+	Field2 int
+}
+
+type RedactedStruct struct {
+	Field1 string
+	Field2 int
+}
+
+func (t *RedactedStruct) Redacted() any {
+	return struct {
+		Field1 string
+		Field2 int
+	}{
+		Field1: "redacted",
+		Field2: t.Field2,
+	}
+}