feat(cli): 'lectio --liturgy/-L' prints the computed liturgical day offline

Uses the pure engine + embedded universal calendar; UI-language names, rank,
colour, cycles, and inline proper readings. Added the Assumption's propers.

1 files changed, 33 insertions, 0 deletions

diff --git a/internal/cli/liturgy_test.go b/internal/cli/liturgy_test.go
new file mode 100644
index 0000000..c3ab0b4
--- /dev/null
+++ b/internal/cli/liturgy_test.go
@@ -0,0 +1,33 @@
+package cli
+
+import (
+	"bytes"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/lukaszkasprzak/lectio/internal/config"
+)
+
+func TestRunLiturgy(t *testing.T) {
+	dir := t.TempDir()
+	t.Setenv("LECTIO_CONFIG", filepath.Join(dir, "config.ini"))
+	cfg, err := config.Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+	var buf bytes.Buffer
+	if code := runLiturgy(cfg, "2025-08-15", &buf, &buf); code != 0 {
+		t.Fatalf("exit code %d", code)
+	}
+	out := buf.String()
+	if !strings.Contains(out, "2025-08-15") {
+		t.Errorf("missing date:\n%s", out)
+	}
+	if !strings.Contains(strings.ToLower(out), "solemnity") || !strings.Contains(out, "Assumption") {
+		t.Errorf("2025-08-15 should be the Assumption solemnity:\n%s", out)
+	}
+	if !strings.Contains(out, "gospel:") {
+		t.Errorf("proper reading not shown:\n%s", out)
+	}
+}