Add weather API bundle adapter

internal/app/app_test.go

@@ -0,0 +1,64 @@
+package app
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.maximumdirect.net/eric/weatherreporter/internal/config"
+)
+
+func TestFetchAndSaveBundle(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/observations":
+			_, _ = w.Write([]byte(`{"data":{"timestamp":"2026-05-29T14:00:00Z","conditionCode":3}}`))
+		case "/conditions/current":
+			_, _ = w.Write([]byte(`{"data":{"conditionText":"Clear"}}`))
+		case "/forecast/hourly":
+			_, _ = w.Write([]byte(`{"data":{"issuedAt":"2026-05-29T10:30:00-05:00","product":"hourly","periods":[{"startTime":"2026-05-29T13:00:00-05:00","endTime":"2026-05-29T14:00:00-05:00"}]}}`))
+		case "/forecast/narrative":
+			_, _ = w.Write([]byte(`{"data":{"issuedAt":"2026-05-29T10:30:00-05:00","product":"narrative","periods":[]}}`))
+		case "/alerts/active":
+			_, _ = w.Write([]byte(`{"data":{"alerts":[]}}`))
+		case "/discussion":
+			_, _ = w.Write([]byte(`{"data":{"product":"discussion","issuedAt":"2026-05-29T09:25:00-05:00","keyMessages":[]}}`))
+		default:
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	cfg := config.Defaults()
+	cfg.WeatherAPI.BaseURL = server.URL + "/"
+	path := filepath.Join(t.TempDir(), "bundle.json")
+
+	bundle, err := FetchAndSaveBundle(context.Background(), FetchBundleRequest{Config: cfg, OutputPath: path})
+	if err != nil {
+		t.Fatalf("FetchAndSaveBundle() error = %v", err)
+	}
+	if bundle.Hourly == nil {
+		t.Fatal("Hourly = nil, want fetched bundle")
+	}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("read saved bundle: %v", err)
+	}
+	if !strings.Contains(string(data), `"product": "hourly"`) {
+		t.Fatalf("saved bundle missing hourly product:\n%s", string(data))
+	}
+}
+
+func TestFetchAndSaveBundleRequiresOutputPath(t *testing.T) {
+	_, err := FetchAndSaveBundle(context.Background(), FetchBundleRequest{Config: config.Defaults()})
+	if err == nil {
+		t.Fatal("FetchAndSaveBundle() error = nil, want output path error")
+	}
+	if !strings.Contains(err.Error(), "output path") {
+		t.Fatalf("error = %q, want output path context", err.Error())
+	}
+}