package com.example;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

public class MainTest {

    @Test
    @DisplayName("Basic navigation: visit, back, forward")
    void testBasicNavigation() {
        BrowserHistory bh = new BrowserHistory("leetcode.com");
        bh.visit("google.com");
        bh.visit("facebook.com");
        bh.visit("youtube.com");
        assertEquals("facebook.com", bh.back(1), "Should go back to facebook.com");
        assertEquals("google.com", bh.back(1), "Should go back to google.com");
        assertEquals("facebook.com", bh.forward(1), "Should go forward to facebook.com");
        bh.visit("linkedin.com");
        assertEquals("linkedin.com", bh.getCurrentPage(), "Should be linkedin.com after visit");
        assertEquals("google.com", bh.back(2), "Should go back to google.com");
        assertEquals("leetcode.com", bh.back(2), "Should go back to leetcode.com (can't go further)");
        assertEquals("google.com", bh.forward(1), "Should go forward to google.com (can't go further than available)");
    }

    @Test
    @DisplayName("Back and forward at boundaries")
    void testBoundaries() {
        BrowserHistory bh = new BrowserHistory("start.com");
        assertEquals("start.com", bh.back(1), "Back at homepage should stay at homepage");
        assertEquals("start.com", bh.forward(1), "Forward at homepage should stay at homepage");
        bh.visit("a.com");
        bh.visit("b.com");
        bh.visit("c.com");
        assertEquals("a.com", bh.back(2), "Should go back to a.com");
        assertEquals("start.com", bh.back(10), "Back more steps than history should stay at homepage");
        assertEquals("a.com", bh.forward(1), "Should go forward to a.com");
        assertEquals("c.com", bh.forward(10), "Forward more steps than possible should go to last visited");
    }

    @Test
    @DisplayName("Forward stack clears on visit")
    void testForwardStackClearsOnVisit() {
        BrowserHistory bh = new BrowserHistory("home.com");
        bh.visit("1.com");
        bh.visit("2.com");
        bh.back(1);
        bh.visit("3.com");
        assertEquals("home.com", bh.back(2), "Should go back to home.com");
        assertEquals("1.com", bh.forward(1), "Should go forward to 1.com");
        assertEquals("3.com", bh.forward(2), "Should go forward to 3.com (can't go past)");
    }

    @Test
    @DisplayName("Get current page after operations")
    void testGetCurrentPage() {
        BrowserHistory bh = new BrowserHistory("main.com");
        assertEquals("main.com", bh.getCurrentPage(), "Initial page should be main.com");
        bh.visit("a.com");
        bh.visit("b.com");
        bh.back(1);
        assertEquals("a.com", bh.getCurrentPage(), "After back, should be a.com");
        bh.forward(1);
        assertEquals("b.com", bh.getCurrentPage(), "After forward, should be b.com");
    }
}

MainTest.java

Un guide pratique des structures de données et collections en Java. Explorez les listes, listes chaînées, files d'attente, dequeues, piles et maps, tout en pratiquant les opérations CRUD, la complexité algorithmique et des défis concrets tels que la gestion de bibliothèque et l'historique de navigation.

Un guide pratique des structures de données et collections en Java. Exploration des listes, listes chaînées, files d'attente, dequeues, piles et maps, avec mise en pratique des opérations CRUD, de la complexité algorithmique et de défis concrets tels que la gestion de bibliothèque et l'historique de navigation.

Défi : Implémentation de l’Historique de Navigation

Solution