Created the tests for the navbar interactor

src/test/java/use_case/nav_bar/NavbarInteractorTests.java

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+package use_case.nav_bar;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * Test class for NavbarInteractor.
+ * It verifies that the interactor correctly delegates navigation requests
+ * to the presenter for all available views.
+ */
+public class NavbarInteractorTests {
+    /**
+     * Tests that switchToLogin correctly calls the presenter's switchToLogin method.
+     */
+    @Test
+    void testSwitchToLogin() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToLogin();
+
+        assertEquals("login", presenter.getLastViewSwitched(),
+                "Presenter should switch to login view.");
+    }
+
+    /**
+     * Tests that switchToSignUp correctly calls the presenter's switchToSignUp method.
+     */
+    @Test
+    void testSwitchToSignUp() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToSignUp();
+
+        assertEquals("signup", presenter.getLastViewSwitched(),
+                "Presenter should switch to signup view.");
+    }
+
+    /**
+     * Tests that switchToCommunity correctly calls the presenter's switchToCommunity method.
+     */
+    @Test
+    void testSwitchToCommunity() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToCommunity();
+
+        assertEquals("community", presenter.getLastViewSwitched(),
+                "Presenter should switch to community view.");
+    }
+
+    /**
+     * Tests that switchToGenerateRecipe correctly calls the presenter's switchToGenerateRecipe method.
+     */
+    @Test
+    void testSwitchToGenerateRecipe() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToGenerateRecipe();
+
+        assertEquals("generateRecipe", presenter.getLastViewSwitched(),
+                "Presenter should switch to generate recipe view.");
+    }
+
+    /**
+     * Tests that switchToApproveRecipe correctly calls the presenter's switchToApproveRecipe method.
+     */
+    @Test
+    void testSwitchToApproveRecipe() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToApproveRecipe();
+
+        assertEquals("approveRecipe", presenter.getLastViewSwitched(),
+                "Presenter should switch to approve recipe view.");
+    }
+
+    /**
+     * Tests that switchToProfile correctly calls the presenter's switchToProfile method.
+     */
+    @Test
+    void testSwitchToProfile() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToProfile();
+
+        assertEquals("profile", presenter.getLastViewSwitched(),
+                "Presenter should switch to profile view.");
+    }
+
+    /**
+     * Tests that switchToGroceryList correctly calls the presenter's switchToGroceryList method.
+     */
+    @Test
+    void testSwitchToGroceryList() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToGroceryList();
+
+        assertEquals("groceryList", presenter.getLastViewSwitched(),
+                "Presenter should switch to grocery list view.");
+    }
+
+    /**
+     * Tests that switchToMealPlan correctly calls the presenter's switchToMealPlan method.
+     */
+    @Test
+    void testSwitchToMealPlan() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToMealPlan();
+
+        assertEquals("mealPlan", presenter.getLastViewSwitched(),
+                "Presenter should switch to meal plan view.");
+    }
+
+    /**
+     * Tests that switchToSearchByIngredients correctly calls the presenter's switchToSearchByIngredients method.
+     */
+    @Test
+    void testSwitchToSearchByIngredients() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToSearchByIngredients();
+
+        assertEquals("searchByIngredients", presenter.getLastViewSwitched(),
+                "Presenter should switch to search by ingredients view.");
+    }
+
+    /**
+     * Tests that switchToLikedRecipeList correctly calls the presenter's switchToLikedRecipeList method.
+     */
+    @Test
+    void testSwitchToLikedRecipeList() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToLikedRecipeList();
+
+        assertEquals("likedRecipeList", presenter.getLastViewSwitched(),
+                "Presenter should switch to liked recipe list view.");
+    }
+
+    /**
+     * Tests that multiple sequential switch calls work correctly.
+     * Verifies that the presenter tracks the most recent view switch.
+     */
+    @Test
+    void testMultipleSwitchCallsInSequence() {
+        final NavbarMockPresenter presenter = new NavbarMockPresenter();
+        final NavbarInteractor interactor = new NavbarInteractor(presenter);
+
+        interactor.switchToLogin();
+        assertEquals("login", presenter.getLastViewSwitched(),
+                "First switch should be to login view.");
+
+        interactor.switchToProfile();
+        assertEquals("profile", presenter.getLastViewSwitched(),
+                "Second switch should be to profile view.");
+
+        interactor.switchToCommunity();
+        assertEquals("community", presenter.getLastViewSwitched(),
+                "Third switch should be to community view.");
+    }
+}

src/test/java/use_case/nav_bar/NavbarMockPresenter.java

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+package use_case.nav_bar;
+
+import use_case.nav_bar.NavbarOutputBoundary;
+
+/**
+ * Mock implementation of NavbarOutputBoundary for testing purposes.
+ * Tracks which view was last switched to, allowing tests to verify
+ * that the interactor correctly delegates to the presenter.
+ */
+public class NavbarMockPresenter implements NavbarOutputBoundary {
+    private String lastViewSwitched = null;
+
+    @Override
+    public void switchToLogin() {
+        this.lastViewSwitched = "login";
+    }
+
+    @Override
+    public void switchToSignUp() {
+        this.lastViewSwitched = "signup";
+    }
+
+    @Override
+    public void switchToCommunity() {
+        this.lastViewSwitched = "community";
+    }
+
+    @Override
+    public void switchToGenerateRecipe() {
+        this.lastViewSwitched = "generateRecipe";
+    }
+
+    @Override
+    public void switchToApproveRecipe() {
+        this.lastViewSwitched = "approveRecipe";
+    }
+
+    @Override
+    public void switchToProfile() {
+        this.lastViewSwitched = "profile";
+    }
+
+    @Override
+    public void switchToGroceryList() {
+        this.lastViewSwitched = "groceryList";
+    }
+
+    @Override
+    public void switchToMealPlan() {
+        this.lastViewSwitched = "mealPlan";
+    }
+
+    @Override
+    public void switchToSearchByIngredients() {
+        this.lastViewSwitched = "searchByIngredients";
+    }
+
+    @Override
+    public void switchToLikedRecipeList() {
+        this.lastViewSwitched = "likedRecipeList";
+    }
+
+    /**
+     * Gets the last view that was switched to.
+     * @return the name of the last view switched to, or null if no switch has occurred
+     */
+    public String getLastViewSwitched() {
+        return lastViewSwitched;
+    }
+}