Add pixel text editor and built-in messages

pixel/messages_test.go

@@ -0,0 +1,28 @@
+package pixel
+
+import "testing"
+
+func TestMessagesCoverBothLocales(t *testing.T) {
+	for key := range messages[En] {
+		if _, ok := messages[Zh][key]; !ok {
+			t.Errorf("message %q missing in Chinese", key)
+		}
+	}
+	for key := range messages[Zh] {
+		if _, ok := messages[En][key]; !ok {
+			t.Errorf("message %q missing in English", key)
+		}
+	}
+	if got := (Kit{locale: Zh}).Msg("game_over"); got != "游戏结束" {
+		t.Fatalf("Zh game_over = %q", got)
+	}
+	if got := (Kit{locale: En}).Msg("continue"); got != "CONTINUE?" {
+		t.Fatalf("En continue = %q", got)
+	}
+	defer func() {
+		if recover() == nil {
+			t.Fatal("unknown message did not panic")
+		}
+	}()
+	Kit{locale: En}.Msg("no_such_key")
+}