Introduce pluggable email and image upload

src/test/java/com/openisle/controller/UserControllerTest.java

@@ -0,0 +1,60 @@
+package com.openisle.controller;
+
+import com.openisle.model.User;
+import com.openisle.service.ImageUploader;
+import com.openisle.service.UserService;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.http.MediaType;
+import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.test.web.servlet.MockMvc;
+
+import java.util.Optional;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+@WebMvcTest(UserController.class)
+@AutoConfigureMockMvc(addFilters = false)
+class UserControllerTest {
+    @Autowired
+    private MockMvc mockMvc;
+
+    @MockBean
+    private UserService userService;
+    @MockBean
+    private ImageUploader imageUploader;
+
+    @Test
+    void getCurrentUser() throws Exception {
+        User u = new User();
+        u.setId(1L);
+        u.setUsername("alice");
+        u.setEmail("a@b.com");
+        u.setAvatar("http://x/avatar.png");
+        Mockito.when(userService.findByUsername("alice")).thenReturn(Optional.of(u));
+
+        mockMvc.perform(get("/api/users/me").principal(new UsernamePasswordAuthenticationToken("alice","p")))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.avatar").value("http://x/avatar.png"));
+    }
+
+    @Test
+    void uploadAvatar() throws Exception {
+        MockMultipartFile file = new MockMultipartFile("file", "a.png", MediaType.IMAGE_PNG_VALUE, "img".getBytes());
+        Mockito.when(imageUploader.upload(any(), eq("a.png"))).thenReturn("http://img/a.png");
+
+        mockMvc.perform(multipart("/api/users/me/avatar").file(file).principal(new UsernamePasswordAuthenticationToken("alice","p")))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.url").value("http://img/a.png"));
+
+        Mockito.verify(userService).updateAvatar("alice", "http://img/a.png");
+    }
+}