Simplify replacements logic for golden files (#2132)

## Changes
- Do not sort, use fixed order of replacements.

## Tests
Existing tests.

libs/testdiff/golden.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"os"
 	"regexp"
-	"slices"
 	"strings"
 	"testing"
 
@@ -17,6 +16,10 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+const (
+	testerName = "$USERNAME"
+)
+
 var OverwriteMode = false
 
 func init() {
@@ -165,7 +168,7 @@ func PrepareReplacements(t testutil.TestingT, r *ReplacementsContext, w *databri
 	r.Set(w.Config.AzureResourceID, "$DATABRICKS_AZURE_RESOURCE_ID")
 	r.Set(w.Config.AzureClientSecret, "$ARM_CLIENT_SECRET")
 	// r.Set(w.Config.AzureClientID, "$ARM_CLIENT_ID")
-	r.Set(w.Config.AzureClientID, "$USERNAME")
+	r.Set(w.Config.AzureClientID, testerName)
 	r.Set(w.Config.AzureTenantID, "$ARM_TENANT_ID")
 	r.Set(w.Config.ActionsIDTokenRequestURL, "$ACTIONS_ID_TOKEN_REQUEST_URL")
 	r.Set(w.Config.ActionsIDTokenRequestToken, "$ACTIONS_ID_TOKEN_REQUEST_TOKEN")
@@ -181,24 +184,20 @@ func PrepareReplacementsUser(t testutil.TestingT, r *ReplacementsContext, u iam.
 	t.Helper()
 	// There could be exact matches or overlap between different name fields, so sort them by length
 	// to ensure we match the largest one first and map them all to the same token
-	names := []string{
-		u.DisplayName,
-		u.UserName,
-		iamutil.GetShortUserName(&u),
-	}
-	if u.Name != nil {
-		names = append(names, u.Name.FamilyName)
-		names = append(names, u.Name.GivenName)
-	}
-	for _, val := range u.Emails {
-		names = append(names, val.Value)
-	}
-	stableSortReverseLength(names)
 
-	for _, name := range names {
+	r.Set(u.UserName, testerName)
-		r.Set(name, "$USERNAME")
+	r.Set(u.DisplayName, testerName)
+	if u.Name != nil {
+		r.Set(u.Name.FamilyName, testerName)
+		r.Set(u.Name.GivenName, testerName)
 	}
 
+	for _, val := range u.Emails {
+		r.Set(val.Value, testerName)
+	}
+
+	r.Set(iamutil.GetShortUserName(&u), testerName)
+
 	for ind, val := range u.Groups {
 		r.Set(val.Value, fmt.Sprintf("$USER.Groups[%d]", ind))
 	}
@@ -210,12 +209,6 @@ func PrepareReplacementsUser(t testutil.TestingT, r *ReplacementsContext, u iam.
 	}
 }
 
-func stableSortReverseLength(strs []string) {
-	slices.SortStableFunc(strs, func(a, b string) int {
-		return len(b) - len(a)
-	})
-}
-
 func NormalizeNewlines(input string) string {
 	output := strings.ReplaceAll(input, "\r\n", "\n")
 	return strings.ReplaceAll(output, "\r", "\n")

libs/testdiff/golden_test.go

@@ -1,13 +0,0 @@
-package testdiff
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSort(t *testing.T) {
-	input := []string{"a", "bc", "cd"}
-	stableSortReverseLength(input)
-	assert.Equal(t, []string{"bc", "cd", "a"}, input)
-}