Implemented the weather forecast discussion product from weatherfeeder v0.8.3

internal/app/service_test.go

@@ -14,6 +14,7 @@ type fakeRepository struct {
 	observation *model.WeatherObservation
 	forecast    *model.WeatherForecastRun
 	narrative   *model.WeatherForecastRun
+	discussion  *model.WeatherForecastDiscussion
 	alerts      *model.WeatherAlertRun
 	conditions  *CurrentConditions
 	err         error
@@ -33,6 +34,10 @@ func (r *fakeRepository) LatestNarrativeForecast(context.Context) (*model.Weathe
 	return r.narrative, r.err
 }
 
+func (r *fakeRepository) LatestForecastDiscussion(context.Context) (*model.WeatherForecastDiscussion, error) {
+	return r.discussion, r.err
+}
+
 func (r *fakeRepository) LatestAlertRun(context.Context) (*model.WeatherAlertRun, error) {
 	return r.alerts, r.err
 }
@@ -94,6 +99,19 @@ func TestServiceDelegatesAlerts(t *testing.T) {
 	}
 }
 
+func TestServiceDelegatesForecastDiscussion(t *testing.T) {
+	repo := &fakeRepository{discussion: &model.WeatherForecastDiscussion{OfficeID: "LSX"}}
+	svc := NewService(repo)
+
+	run, err := svc.LatestForecastDiscussion(context.Background())
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if run == nil || run.OfficeID != "LSX" {
+		t.Fatalf("unexpected forecast discussion: %+v", run)
+	}
+}
+
 func TestServiceUsesDefaultCurrentConditionsWindow(t *testing.T) {
 	repo := &fakeRepository{conditions: &CurrentConditions{ConditionCode: model.WMOUnknown}}
 	svc := NewService(repo)