feat(menu): MainMenu, SettingsMenu, MenuAction (frontend-agnostic)

Semesterprojekt/src/test/java/thb/jeanluc/adventure/menu/MenuTest.java

@@ -0,0 +1,49 @@
+package thb.jeanluc.adventure.menu;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.save.SaveService;
+import thb.jeanluc.adventure.save.Settings;
+import thb.jeanluc.adventure.save.SettingsStore;
+import thb.jeanluc.adventure.io.ConsoleIO;
+
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class MenuTest {
+
+    @Test
+    void mainMenuMapsChoiceToAction() {
+        // options order: New Game(1) / Load(2) / Settings(3) / Quit(4)
+        assertThat(MainMenu.show(new TestIO().enqueue("1"))).isEqualTo(MenuAction.NEW_GAME);
+        assertThat(MainMenu.show(new TestIO().enqueue("2"))).isEqualTo(MenuAction.LOAD);
+        assertThat(MainMenu.show(new TestIO().enqueue("3"))).isEqualTo(MenuAction.SETTINGS);
+        assertThat(MainMenu.show(new TestIO().enqueue("4"))).isEqualTo(MenuAction.QUIT);
+    }
+
+    @Test
+    void promptNameUsesDefaultOnBlank() {
+        assertThat(MainMenu.promptName(new TestIO().enqueue(""), "Manor")).isEqualTo("Manor");
+        assertThat(MainMenu.promptName(new TestIO().enqueue("Spooky"), "Manor")).isEqualTo("Spooky");
+    }
+
+    @Test
+    void pickSlotReturnsNullWhenEmpty(@TempDir Path dir) {
+        TestIO io = new TestIO();
+        assertThat(MainMenu.pickSlot(io, new SaveService(dir))).isNull();
+        assertThat(io.allOutput()).contains("No saved games");
+    }
+
+    @Test
+    void settingsMenuTogglesGlyphAndPersists(@TempDir Path dir) {
+        SettingsStore store = new SettingsStore(dir.resolve("settings.json"));
+        // choose "Glyph mode" (assume option 2) → its toggle, then "Back" (last)
+        TestIO io = new TestIO().enqueue("2").enqueue("3");
+        Settings result = SettingsMenu.show(io, Settings.defaults(), store, new ConsoleIO());
+        // UNICODE default toggles to ASCII; persisted
+        assertThat(result.glyphMode()).isEqualTo(ConsoleIO.GlyphMode.ASCII);
+        assertThat(store.load().glyphMode()).isEqualTo(ConsoleIO.GlyphMode.ASCII);
+    }
+}