Bael 1625 (#3831)

* shutdown boot app

* test the ctx.close()

* application shutdown test

* BAEL-1625

* /shutdown endpoint test

* bring back the closeApplication

* @Ignore shutdown endpoint test

spring-boot/src/test/java/com/baeldung/shutdown/ShutdownApplicationTest.java

@@ -0,0 +1,43 @@
+package com.baeldung.shutdown;
+
+import org.junit.Before;
+import org.junit.Ignore;
+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.SpringJUnit4ClassRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = Application.class)
+@AutoConfigureMockMvc
+public class ShutdownApplicationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setup() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
+    }
+
+    @Test
+    @Ignore
+    public void givenBootApp_whenShutdownEndpoint_thenExit() throws Exception {
+
+        mockMvc.perform(
+                post("/shutdown"))
+                .andExpect(status().isOk());
+    }
+}