added play-framework project (#678)

* made changes to java reflection

* removed redundant method makeSound in Animal abstract class

* added project for play-framework article

play-framework/student-api/test/ApplicationTest.java

@@ -0,0 +1,45 @@
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.junit.*;
+
+import play.mvc.*;
+import play.test.*;
+import play.data.DynamicForm;
+import play.data.validation.ValidationError;
+import play.data.validation.Constraints.RequiredValidator;
+import play.i18n.Lang;
+import play.libs.F;
+import play.libs.F.*;
+import play.twirl.api.Content;
+
+import static play.test.Helpers.*;
+import static org.junit.Assert.*;
+
+
+/**
+ *
+ * Simple (JUnit) tests that can call all parts of a play app.
+ * If you are interested in mocking a whole application, see the wiki for more details.
+ *
+ */
+public class ApplicationTest {
+
+    @Test
+    public void simpleCheck() {
+        int a = 1 + 1;
+        assertEquals(2, a);
+    }
+
+    @Test
+    public void renderTemplate() {
+        Content html = views.html.index.render("Your new application is ready.");
+        assertEquals("text/html", html.contentType());
+        assertTrue(html.body().contains("Your new application is ready."));
+    }
+
+
+}