Adding ratpack module (#1374)

* adding ratpack module

* adding pom.xml

ratpack/src/test/java/com/baeldung/ApplicationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung;
+
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import ratpack.test.MainClassApplicationUnderTest;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(JUnit4.class)
+public class ApplicationTest {
+
+	MainClassApplicationUnderTest appUnderTest = new MainClassApplicationUnderTest(Application.class);
+
+	@Test
+	public void givenDefaultUrl_getStaticText() {
+		assertEquals("Welcome to baeldung ratpack!!!", appUnderTest.getHttpClient().getText("/"));
+	}
+	
+	@Test
+	public void givenDynamicUrl_getDynamicText() {
+		assertEquals("Hello dummybot!!!", appUnderTest.getHttpClient().getText("/dummybot"));
+	}
+	
+	@After
+	public void shutdown() {
+		appUnderTest.close();
+	}
+
+}