Add extra test

assignments/A3/spec/message.spec.js

@@ -19,7 +19,7 @@ describe("match",
                     expect(message.match(testMsg,{"Subject": "lunch"})).toEqual(true);
                 });
 			});
-			describe("message body",
+describe("message body",
          function () {
              it("unsigned message",
                 function () {
@@ -51,6 +51,10 @@ ciao,
 Marco
 `);
                 });
+                it("no body",
+                    function() {
+                        expect(message.body(testMsg)).toEqual(undefined)
+                    });
                
          });
 let fullHeaderMsg ={"headers": {