feat(otel-2647): add tests and update setAttributes logic

Author: dd-jasminesun

receiver/datadogrumreceiver/internal/translator/rum_translator.go

@@ -494,7 +494,7 @@ func setAttributes(flatPayload map[string]any, attributes pcommon.Map) {
 			if o, ok := val.(map[string]any); ok {
 				objVal := attributes.PutEmptyMap(meta.OTLPName)
 				for k, v := range o {
-					objVal.PutStr(meta.OTLPName+k, v.(string))
+					objVal.PutStr(k, fmt.Sprintf("%v", v))
 				}
 			}
 		case ArrayAttribute:

receiver/datadogrumreceiver/internal/translator/rum_translator_test.go

@@ -18,3 +18,26 @@ func TestParseW3CTraceContext(t *testing.T) {
 	assert.Equal(t, traceID, pcommon.TraceID([16]byte{0x4b, 0xf9, 0x2f, 0x35, 0x77, 0xb3, 0x4d, 0xa6, 0xa3, 0xce, 0x92, 0x9d, 0x0e, 0x0e, 0x47, 0x36}))
 	assert.Equal(t, spanID, pcommon.SpanID([8]byte{0x00, 0xf0, 0x67, 0xaa, 0x0b, 0xa9, 0x02, 0xb7}))
 }
+
+func TestSetAttributes(t *testing.T) {
+	payload := map[string]any{
+		"action.id":          []any{"123", "456"},
+		"view.loading_time":  123,
+		"view.in_foreground": true,
+		"context":            map[string]any{"browser.name": "chrome"},
+	}
+	attributes := pcommon.NewMap()
+	setAttributes(payload, attributes)
+
+	actionID, _ := attributes.Get("datadog.action.id")
+	assert.Equal(t, []any{"123", "456"}, actionID.Slice().AsRaw())
+
+	viewLoadingTime, _ := attributes.Get("datadog.view.loading_time")
+	assert.Equal(t, 123, int(viewLoadingTime.AsRaw().(int64)))
+
+	viewInForeground, _ := attributes.Get("datadog.view.in_foreground")
+	assert.Equal(t, true, viewInForeground.AsRaw().(bool))
+
+	context, _ := attributes.Get("datadog.context")
+	assert.Equal(t, "chrome", context.Map().AsRaw()["browser.name"])
+}