Fixed issue where an empty payload was changed to an empty object.

src/__tests__/__snapshots__/request.spec.js.snap

@@ -24,9 +24,9 @@ exports[`Request should execute a request 2`] = `
 Object {
   "body": "{\\"hello\\": \\"world\\"}",
   "request": Object {
-    "body": Object {},
+    "body": undefined,
     "endpoint": "http://martianwabbit.com/user",
-    "headers": Object {},
+    "headers": undefined,
   },
   "response": Object {
     "body": "{\\"hello\\": \\"world\\"}",

src/__tests__/__snapshots__/requestList.spec.js.snap

@@ -10,7 +10,7 @@ Object {
       "name": "Sergio",
     },
     "endpoint": "http://martianwabbit.com/user",
-    "headers": Object {},
+    "headers": undefined,
   },
   "response": Object {
     "body": "{\\"hello\\": \\"world\\"}",

src/request.js

@@ -3,7 +3,8 @@ const {
 	httpVerbs,
 	requestRegex,
 	replacementRegex,
-	UpperCaseKeys
+	UpperCaseKeys,
+	removeOptionalKeys
 } = require('./shared');
 const RequestList = require('./requestList');
 const RequestCache = require('./requestCache');
@@ -81,17 +82,23 @@ class Request {
 		});
 
 		try {
-			const response = await request({
+			const response = await request(
-				url: settings.endpoint,
+				removeOptionalKeys(
-				method: settings.method,
+					{
-				headers: settings.headers,
+						url: settings.endpoint,
-				qs: settings.query,
+						method: settings.method,
-				body: settings.payload,
 
-				json: true,
+						headers: settings.headers,
-				simple: false,
+						qs: settings.query,
-				resolveWithFullResponse: true
+						body: settings.payload,
-			});
+
+						json: true,
+						simple: false,
+						resolveWithFullResponse: true
+					},
+					['headers', 'qs', 'body']
+				)
+			);
 
 			const results = {
 				request: {

src/shared.js

@@ -19,9 +19,28 @@ const UpperCaseKeys = function(obj) {
 	return result;
 };
 
+const removeOptionalKeys = function(obj, optionalValues) {
+	let result = {};
+
+	Object.keys(obj).forEach(key => {
+		if (
+			optionalValues.includes(key) &&
+			(Object.keys(obj[key]).length === 0 &&
+				obj[key].constructor === Object)
+		) {
+			return;
+		}
+
+		result[key] = obj[key];
+	});
+
+	return result;
+};
+
 module.exports = {
 	httpVerbs,
 	requestRegex,
 	replacementRegex,
-	UpperCaseKeys
+	UpperCaseKeys,
+	removeOptionalKeys
 };