Add userList view test

Author: Kento75

src/test/java/com/example/demo/HomeControllerTest.java

@@ -0,0 +1,43 @@
+package com.example.demo;
+
+import static org.hamcrest.Matchers.*;
+import static org.mockito.Mockito.*;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import com.example.demo.domain.service.UserService;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+public class HomeControllerTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @MockBean
+    private UserService service;
+
+    @Test
+    @WithMockUser
+    public void ユーザーリスト画面のユーザー件数のテスト() throws Exception {
+
+        // UserServiceのcountメソッドの戻り値を10に設定
+        when(service.count()).thenReturn(10);
+
+        // ユーザーリスト画面のチェック
+        mockMvc.perform(get("/userList"))
+                .andExpect(status().isOk())
+                .andExpect(content().string(containsString("合計：10件")));
+    }
+}