Add library view and series drill-down (M8)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/arr/update_test.go

@@ -0,0 +1,48 @@
+package arr
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestUpdateKeepsUnknownFields(t *testing.T) {
+	var put map[string]any
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/api/v3/movie/7" {
+			t.Errorf("path %s", r.URL.Path)
+		}
+		switch r.Method {
+		case http.MethodGet:
+			io.WriteString(w, `{"id":7,"monitored":true,"customThing":{"a":[1,2]},"seasons":[{"seasonNumber":1,"monitored":true,"x":1},{"seasonNumber":2,"monitored":true}]}`)
+		case http.MethodPut:
+			json.NewDecoder(r.Body).Decode(&put)
+		}
+	}))
+	defer srv.Close()
+
+	err := NewClient(srv.URL, "k").Update(context.Background(), "movie", 7, func(o map[string]json.RawMessage) error {
+		SetBool(o, "monitored", false)
+		return SetSeasonMonitored(o, 2, false)
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if put["monitored"] != false || put["customThing"] == nil {
+		t.Errorf("put = %v", put)
+	}
+	seasons := put["seasons"].([]any)
+	if seasons[0].(map[string]any)["monitored"] != true || seasons[1].(map[string]any)["monitored"] != false || seasons[0].(map[string]any)["x"] == nil {
+		t.Errorf("seasons = %v", seasons)
+	}
+}
+
+func TestSetSeasonMonitoredUnknownSeason(t *testing.T) {
+	obj := map[string]json.RawMessage{"seasons": json.RawMessage(`[{"seasonNumber":1,"monitored":true}]`)}
+	if err := SetSeasonMonitored(obj, 5, true); err == nil {
+		t.Error("want error")
+	}
+}