test(delivery): cover CloudDM datasource deletion request

server/internal/service/delivery_test.go

@@ -189,6 +189,37 @@ func TestBuildCloudDMRegisterRequest(t *testing.T) {
 	}
 }
 
+func TestBuildCloudDMDeleteRequest(t *testing.T) {
+	req := buildCloudDMDeleteRequest(model.DeploymentResult{ID: 42})
+	if req.SourceSystem != "xinfra" || req.ResourceType != "MYSQL_INSTANCE" {
+		t.Fatalf("unexpected request metadata: %#v", req)
+	}
+	if req.ExternalResourceID != "mysql-instance:42" {
+		t.Fatalf("unexpected externalResourceId: %q", req.ExternalResourceID)
+	}
+}
+
+func TestCloudDMDeleteInfoAndMetadata(t *testing.T) {
+	meta := map[string]any{
+		"clouddm": map[string]any{
+			"data_source_id":       123.0,
+			"delete_status":        "Failed",
+			"delete_error":         "boom",
+			"deleted_at":           "",
+			"external_resource_id": "mysql-instance:42",
+		},
+	}
+	dataSourceID, deleteStatus := cloudDMDeleteInfo(meta)
+	if dataSourceID != 123 || deleteStatus != "failed" {
+		t.Fatalf("unexpected delete info: %d, %q", dataSourceID, deleteStatus)
+	}
+	updated := updateCloudDMDeleteMetadata(meta, "deleted", "", "2026-07-30T12:00:00Z")
+	clouddm := updated["clouddm"].(map[string]any)
+	if clouddm["delete_status"] != "deleted" || clouddm["delete_error"] != "" || clouddm["deleted_at"] != "2026-07-30T12:00:00Z" {
+		t.Fatalf("unexpected updated metadata: %#v", clouddm)
+	}
+}
+
 func TestCloudDMDataSourceIDFromResponse(t *testing.T) {
 	tests := []struct {
 		name string