add modules for spring boot custom starter BAEL-762 (#1661)

spring-boot-custom-starter/greeter-spring-boot-sample-app/src/test/java/com/baeldung/greeter/sample/GreeterSampleApplicationTest.java

@@ -0,0 +1,50 @@
+package com.baeldung.greeter.sample;
+
+import static org.junit.Assert.assertEquals;
+
+import java.time.LocalDateTime;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.baeldung.greeter.Greeter;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = GreeterSampleApplication.class)
+public class GreeterSampleApplicationTest {
+
+    @Autowired
+    private Greeter greeter;
+    
+    @Test
+    public void givenMorningTime_ifMorningMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Good Morning";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 6, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenAfternoonTime_ifAfternoonMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Woha Afternoon";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 13, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenEveningTime_ifEveningMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Good Evening";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 19, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenNightTime_ifNightMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Good Night";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 21, 0));
+        assertEquals(expected, actual);
+    }
+    
+}