Add tags to events automatically

CHANGELOG.md

@@ -6,12 +6,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+- Add unreleased items here.
+
+## [1.2.0] - 2018-03-01
+
 - Update build to test with Go 1.9, drop support for 1.7 since `dep` now
   requires Go 1.8+. Go 1.7 users can still use this library but must manage
   their own dependencies.
 - Add `WithRate(rate float)` to the DataDog client to limit traffic sent to
   the `dogstatsd` daemon. The set rate will be applied to all calls made
   with the returned `Client`.
+- Automatically assign tags to events.
 
 ## [1.1.0] - 2017-08-01
 

metrics/datadog.go

@@ -79,6 +79,10 @@ func (c *DataDogClient) Gauge(name string, value float64) {
 
 // Event tracks an event that may be relevant to other metrics.
 func (c *DataDogClient) Event(e *statsd.Event) {
+	if len(c.tagMap) > 0 {
+		e.Tags = append(e.Tags, c.tagsList()...)
+	}
+
 	c.client.Event(e)
 }
 

metrics/datadog_test.go

@@ -63,4 +63,17 @@ func TestDataDogClient(t *testing.T) {
 	if !reflect.DeepEqual(actual, expected) {
 		t.Fatalf("Expected %v to equal %v", actual, expected)
 	}
+
+	// Events should get tags assigned automatically.
+	e := &statsd.Event{
+		Title: "Test event",
+	}
+
+	datadog.WithTags(map[string]string{
+		"tag1": "value1",
+	}).Event(e)
+
+	if !reflect.DeepEqual(e.Tags, []string{"tag1:value1"}) {
+		t.Fatalf("Expected event to have tags '[tag1:value1]'. Found '%v'", e.Tags)
+	}
 }