Added spring boot related tests for building Rest API article

spring-boot-rest/src/test/java/com/baeldung/web/FooControllerAppIntegrationTest.java

@@ -0,0 +1,36 @@
+package com.baeldung.web;
+
+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.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+
+/**
+ * 
+ *  We'll start the whole context, but not the server. We'll mock the REST calls instead.
+ *
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+public class FooControllerAppIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void whenFindPaginatedRequest_thenEmptyResponse() throws Exception {
+        this.mockMvc.perform(get("/auth/foos").param("page", "0")
+            .param("size", "2"))
+            .andExpect(status().isOk())
+            .andExpect(content().json("[]"));
+    }
+
+}

spring-boot-rest/src/test/java/com/baeldung/web/FooControllerWebLayerIntegrationTest.java

@@ -0,0 +1,60 @@
+package com.baeldung.web;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.when;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import java.util.Collections;
+
+import org.hamcrest.Matchers;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import com.baeldung.persistence.model.Foo;
+import com.baeldung.persistence.service.IFooService;
+import com.baeldung.web.controller.FooController;
+import com.baeldung.web.hateoas.event.PaginatedResultsRetrievedEvent;
+
+/**
+ * 
+ *  We'll start only the web layer.
+ *
+ */
+@RunWith(SpringRunner.class)
+@WebMvcTest(FooController.class)
+public class FooControllerWebLayerIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @MockBean
+    private IFooService service;
+
+    @MockBean
+    private ApplicationEventPublisher publisher;
+
+    @Test()
+    public void givenPresentFoo_whenFindPaginatedRequest_thenPageWithFooRetrieved() throws Exception {
+        Page<Foo> page = new PageImpl<>(Collections.singletonList(new Foo("fooName")));
+        when(service.findPaginated(0, 2)).thenReturn(page);
+        doNothing().when(publisher)
+            .publishEvent(any(PaginatedResultsRetrievedEvent.class));
+
+        this.mockMvc.perform(get("/auth/foos").param("page", "0")
+            .param("size", "2"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$",Matchers.hasSize(1)));
+    }
+
+}