Add test for existing tags

Signed-off-by: Raymond Zhao <raymond.zhao@datadoghq.com>
DataDog · Feb 13, 2025 · 8478356 · 8478356
1 parent 45f3342
commit 8478356
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/lib/saluki-components/src/transforms/dogstatsd_mapper/mod.rs b/lib/saluki-components/src/transforms/dogstatsd_mapper/mod.rs
@@ -758,6 +758,30 @@ mod tests {
         assert_tags(&context, &["user:john_doe", "action:login"]);
     }
 
+    #[test]
+    fn test_retain_existing_tags() {
+        let json_data = json!([{
+          "name": "test",
+          "prefix": "test.",
+          "mappings": [
+            {
+              "match": "test.job.duration.*.*",
+              "name": "test.job.duration.$2",
+              "tags": {
+                "job_type": "$1",
+                "job_name": "$2"
+              }
+            },
+          ]
+        }]);
+        let mut mapper = mapper(json_data).expect("should have parsed mapping config");
+        let metric = counter_metric("test.job.duration.abc.def", &["foo:bar", "baz"]);
+        let context = mapper.try_map(metric.context()).expect("should have remapped");
+        assert_eq!(context.name(), "test.job.duration.def");
+        assert!(context.tags().has_tag("foo:bar"));
+        assert!(context.tags().has_tag("baz"));
+    }
+
     #[test]
     fn test_empty_name() {
         let json_data = json!([{