Added buildfeed test for zero-valued bearing and speed

Author: ShinLiX

handlers_test.go

@@ -674,6 +674,30 @@ func TestHandlePostLocation_RateLimitDifferentVehiclesAreIndependent(t *testing.
 	assert.Equal(t, http.StatusTooManyRequests, postLocationWithClaims(handler, locB, claimsB).Code)
 }
 
+func TestBuildFeed_PreservesExplicitZeroBearingAndSpeed(t *testing.T) {
+	zero := 0.0
+	vehicles := []*VehicleState{
+		{
+			VehicleID: "bus-1",
+			Latitude:  1,
+			Longitude: 2,
+			Bearing:   &zero,
+			Speed:     &zero,
+			Timestamp: 100,
+		},
+	}
+
+	feed := buildFeed(vehicles)
+	require.Len(t, feed.Entity, 1)
+
+	pos := feed.Entity[0].Vehicle.Position
+	require.NotNil(t, pos.Bearing)
+	assert.Equal(t, float32(0), pos.GetBearing())
+
+	require.NotNil(t, pos.Speed)
+	assert.Equal(t, float32(0), pos.GetSpeed())
+}
+
 func TestHandlePostLocation_ExplicitZeroOptionalFieldsPreserved(t *testing.T) {
 	tracker := NewTracker(5 * time.Minute)
 	defer tracker.Stop()