test: Forward, Register, User Controller 테스트 작성

app/src/test/java/com/techcourse/controller/ForwardControllerTest.java

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+package com.techcourse.controller;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.view.JspView;
+
+class ForwardControllerTest {
+
+    @DisplayName("기본 index 페이지를 반환한다.")
+    @Test
+    void show() {
+        // given
+        final ForwardController forwardController = new ForwardController();
+        final HttpServletRequest request = mock(HttpServletRequest.class);
+        final HttpServletResponse response = mock(HttpServletResponse.class);
+
+        final ModelAndView expected = new ModelAndView(new JspView("/index.jsp"));
+
+        // when
+        final ModelAndView actual = forwardController.show(request, response);
+
+        // then
+        assertThat(actual).usingRecursiveComparison().isEqualTo(expected);
+    }
+}

app/src/test/java/com/techcourse/controller/RegisterControllerTest.java

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+package com.techcourse.controller;
+
+import static com.techcourse.repository.InMemoryUserRepository.findByAccount;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import com.techcourse.domain.User;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+import webmvc.org.springframework.web.servlet.view.JspView;
+
+class RegisterControllerTest {
+
+    @DisplayName("새로운 사용자를 올바르게 저장할 수 있다.")
+    @Test
+    void save() {
+        // given
+        final RegisterController registerController = new RegisterController();
+        final HttpServletRequest request = mock(HttpServletRequest.class);
+        final HttpServletResponse response = mock(HttpServletResponse.class);
+
+        final User dino = new User(2L, "dino", "good", "[email protected]");
+
+        when(request.getParameter("account")).thenReturn(dino.getAccount());
+        when(request.getParameter("password")).thenReturn("good");
+        when(request.getParameter("email")).thenReturn("[email protected]");
+
+        // when
+        registerController.save(request, response);
+
+        // then
+        Assertions.assertAll(
+                () -> assertThat(findByAccount("dino")).isPresent(),
+                () -> assertThat(findByAccount("dino").get()).usingRecursiveComparison().isEqualTo(dino)
+        );
+    }
+
+    @DisplayName("회원가입 페이지를 반환한다.")
+    @Test
+    void show() {
+        // given
+        final RegisterController registerController = new RegisterController();
+        final HttpServletRequest request = mock(HttpServletRequest.class);
+        final HttpServletResponse response = mock(HttpServletResponse.class);
+
+        final ModelAndView expected = new ModelAndView(new JspView("register.jsp"));
+
+        // when
+        final ModelAndView actual = registerController.show(request, response);
+
+        // then
+        assertThat(actual).usingRecursiveComparison().isEqualTo(expected);
+    }
+}

app/src/test/java/com/techcourse/controller/UserControllerTest.java

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+package com.techcourse.controller;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import com.techcourse.domain.User;
+import com.techcourse.repository.InMemoryUserRepository;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import webmvc.org.springframework.web.servlet.ModelAndView;
+
+class UserControllerTest {
+
+    @DisplayName("account 값을 통해 메모리에 저장한 사용자의 정보를 파악할 수 있다.")
+    @Test
+    void show() {
+        // given
+        final UserController userController = new UserController();
+        final HttpServletRequest request = mock(HttpServletRequest.class);
+        final HttpServletResponse response = mock(HttpServletResponse.class);
+
+        final User user = new User(99L, "gr", "ay", "[email protected]");
+        InMemoryUserRepository.save(user);
+
+        when(request.getParameter("account")).thenReturn(user.getAccount());
+
+        // when
+        final ModelAndView modelAndView = userController.show(request, response);
+
+        // then
+        assertThat(modelAndView.getObject("user")).isEqualTo(user);
+    }
+}