Make body function work with all tests

assignments/A3/message.js

@@ -8,13 +8,16 @@ function match(message, headers) {
 }
 
 function body(message) {
-	if (message["body"][0]["content-type"] === "text/plain") {
-		return message["body"][0]["content"];
-	}
-	/* istanbul ignore else */
-	if (message["body"][0]["content-type"] === "multipart/signed") {
-		return message["body"][0]["content"][0]["content"];
+	if (message["body"] !== undefined) {
+		if (message["body"][0]["content-type"] === "text/plain") {
+			return message["body"][0]["content"];
+		}
+		/* istanbul ignore else */
+		if (message["body"][0]["content-type"] === "multipart/signed") {
+			return message["body"][0]["content"][0]["content"];
+		}
 	}
+	return undefined;
 }
 
 function string(message) {

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": {