custom class validation (#1832)

* custom class validation

* formatting

spring-mvc-java/src/test/java/com/baeldung/web/controller/ClassValidationMvcTest.java

@@ -0,0 +1,51 @@
+package com.baeldung.web.controller;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.model;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+public class ClassValidationMvcTest {
+  private MockMvc mockMvc;
+    
+    @Before
+    public void setup(){
+        this.mockMvc = MockMvcBuilders.standaloneSetup(new NewUserController()).build();
+    }
+    
+    @Test
+    public void givenMatchingEmailPassword_whenPostNewUserForm_thenOk() throws Exception {
+        this.mockMvc.perform(MockMvcRequestBuilders.post("/user")
+                .accept(MediaType.TEXT_HTML)
+                .param("email", "john@yahoo.com")
+                .param("verifyEmail", "john@yahoo.com")
+                .param("password", "pass")
+                .param("verifyPassword", "pass"))
+                .andExpect(model().attribute("message", "Valid form"))
+                .andExpect(view().name("userHome"))
+                .andExpect(status().isOk())
+                .andDo(print());
+    }
+    
+    @Test
+    public void givenNotMatchingEmailPassword_whenPostNewUserForm_thenOk() throws Exception {
+        this.mockMvc.perform(MockMvcRequestBuilders.post("/user")
+                .accept(MediaType.TEXT_HTML)
+                .param("email", "john@yahoo.com")
+                .param("verifyEmail", "john@yahoo.commmm")
+                .param("password", "pass")
+                .param("verifyPassword", "passsss"))
+                .andExpect(model().errorCount(2))
+                .andExpect(view().name("userHome"))
+                .andExpect(status().isOk())
+                .andDo(print());
+    }
+}