1 files changed, 18 insertions, 0 deletions
diff --git a/internal/web/server_test.go b/internal/web/server_test.go
index 43508ba..284a454 100644
--- a/internal/web/server_test.go
+++ b/internal/web/server_test.go
@@ -645,3 +645,21 @@ func TestExportNoReadings(t *testing.T) {
 		t.Errorf("export with no readings status=%d (want 404/500)", rec.Code)
 	}
 }
+
+func TestCalendarPDF(t *testing.T) {
+	t.Setenv("XDG_CACHE_HOME", t.TempDir())
+	cfg := config.Default()
+	cfg.Offline = true // no network; empty cells are fine, PDF still renders
+	srv := NewServer(cfg)
+	rec := httptest.NewRecorder()
+	srv.ServeHTTP(rec, httptest.NewRequest("GET", "/calendar?month=2026-07", nil))
+	if rec.Code != 200 {
+		t.Fatalf("calendar status %d", rec.Code)
+	}
+	if ct := rec.Header().Get("Content-Type"); ct != "application/pdf" {
+		t.Errorf("content-type %q", ct)
+	}
+	if b := rec.Body.Bytes(); len(b) < 1000 || string(b[:4]) != "%PDF" {
+		t.Errorf("not a pdf (len=%d)", len(b))
+	}
+}