Encode to JSON body for js-fetch target (#179)

Closes #158

Author: jgiovaresco

src/targets/javascript/fetch.js

@@ -40,7 +40,7 @@ module.exports = function (source, options) {
       break
 
     case 'application/json':
-      options.body = source.postData.jsonObj
+      options.body = JSON.stringify(source.postData.jsonObj)
       break
 
     case 'multipart/form-data':

test/fixtures/output/javascript/fetch/application-json.js

@@ -3,26 +3,7 @@ fetch("http://mockbin.com/har", {
   "headers": {
     "content-type": "application/json"
   },
-  "body": {
-    "number": 1,
-    "string": "f\"oo",
-    "arr": [
-      1,
-      2,
-      3
-    ],
-    "nested": {
-      "a": "b"
-    },
-    "arr_mix": [
-      1,
-      "a",
-      {
-        "arr_mix_nested": {}
-      }
-    ],
-    "boolean": false
-  }
+  "body": "{\"number\":1,\"string\":\"f\\\"oo\",\"arr\":[1,2,3],\"nested\":{\"a\":\"b\"},\"arr_mix\":[1,\"a\",{\"arr_mix_nested\":{}}],\"boolean\":false}"
 })
 .then(response => {
   console.log(response);

test/fixtures/output/javascript/fetch/jsonObj-multiline.js

@@ -3,9 +3,7 @@ fetch("http://mockbin.com/har", {
   "headers": {
     "content-type": "application/json"
   },
-  "body": {
-    "foo": "bar"
-  }
+  "body": "{\"foo\":\"bar\"}"
 })
 .then(response => {
   console.log(response);

test/fixtures/output/javascript/fetch/jsonObj-null-value.js

@@ -3,9 +3,7 @@ fetch("http://mockbin.com/har", {
   "headers": {
     "content-type": "application/json"
   },
-  "body": {
-    "foo": null
-  }
+  "body": "{\"foo\":null}"
 })
 .then(response => {
   console.log(response);