fix ut

pkg/provider/azure_test.go

@@ -2215,6 +2215,10 @@ func TestNewCloudFromJSON(t *testing.T) {
 		"vmType": "vmss",
 		"disableAvailabilitySetNodes": true
 	}`
+	os.Setenv("AZURE_FEDERATED_TOKEN_FILE", "--aad-federated-token-file--")
+	defer func() {
+		os.Unsetenv("AZURE_FEDERATED_TOKEN_FILE")
+	}()
 	validateConfig(t, config)
 }
 
@@ -2277,14 +2281,9 @@ publicIPCacheTTLInSeconds: 100
 plsCacheTTLInSeconds: 100
 vmType: vmss
 disableAvailabilitySetNodes: true
-aadFederatedTokenFile: --aad-federated-token-file--
 `
-	os.Setenv("AZURE_TENANT_ID", "123")
-	os.Setenv("AZURE_CLIENT_ID", "456")
-	os.Setenv("AZURE_FEDERATED_TOKEN_FILE", "789")
+	os.Setenv("AZURE_FEDERATED_TOKEN_FILE", "--aad-federated-token-file--")
 	defer func() {
-		os.Unsetenv("AZURE_TENANT_ID")
-		os.Unsetenv("AZURE_CLIENT_ID")
 		os.Unsetenv("AZURE_FEDERATED_TOKEN_FILE")
 	}()
 	validateConfig(t, config)
@@ -2293,13 +2292,13 @@ aadFederatedTokenFile: --aad-federated-token-file--
 func validateConfig(t *testing.T, config string) { //nolint
 	azureCloud := getCloudFromConfig(t, config)
 
-	if azureCloud.TenantID != "123" {
+	if azureCloud.TenantID != "--tenant-id--" {
 		t.Errorf("got incorrect value for TenantID")
 	}
 	if azureCloud.SubscriptionID != "--subscription-id--" {
 		t.Errorf("got incorrect value for SubscriptionID")
 	}
-	if azureCloud.AADClientID != "456" {
+	if azureCloud.AADClientID != "--aad-client-id--" {
 		t.Errorf("got incorrect value for AADClientID")
 	}
 	if azureCloud.AADClientSecret != "--aad-client-secret--" {
@@ -2401,7 +2400,7 @@ func validateConfig(t *testing.T, config string) { //nolint
 	if !azureCloud.DisableAvailabilitySetNodes {
 		t.Errorf("got incorrect value for disableAvailabilitySetNodes")
 	}
-	if azureCloud.AADFederatedTokenFile != "789" {
+	if azureCloud.AADFederatedTokenFile != "--aad-federated-token-file--" {
 		t.Errorf("got incorrect value for AADFederatedTokenFile")
 	}
 	if !azureCloud.UseFederatedWorkloadIdentityExtension {