Add failing test for adding multiple hashes in root level

test/end-to-end-multiple.js

@@ -0,0 +1,110 @@
+'use strict';
+
+import {expect} from 'chai';
+import YAWN from '../src/index.js';
+
+
+const input = `
+swagger: '2.0'
+info:
+  version: 0.0.0
+  title: Simple API
+paths:
+  /:
+    get:
+      responses:
+        '200':
+          description: OK
+`;
+
+const output = `
+swagger: '2.0'
+info:
+  version: 0.0.0
+  title: Simple API
+paths:
+  /:
+    get:
+      responses:
+        '200':
+          description: OK
+  /new-models:
+    post:
+      description: Make a new \`NewModel\`.
+      parameters:
+        - name: body
+          description: A new \`NewModel\`
+          in: body
+          schema:
+            $ref: '#/definitions/NewModel'
+      responses:
+        '200':
+          description: OK
+          schema:
+            $ref: '#/definitions/NewModel'
+definitions:
+  NewModel:
+    type: string
+`;
+
+// Using JSON.parse to get away from style checker!
+const newJson = JSON.parse(`{
+  "swagger": "2.0",
+  "info": {
+    "version": "0.0.0",
+    "title": "Simple API"
+  },
+  "paths": {
+    "/": {
+      "get": {
+        "responses": {
+          "200": {
+            "description": "OK"
+          }
+        }
+      }
+    },
+    "/new-models": {
+      "post": {
+        "description": "Make a new \`NewModel\`.",
+        "parameters": [
+          {
+            "name": "body",
+            "description": "A new \`NewModel\`",
+            "in": "body",
+            "schema": {
+              "$ref": "#/definitions/NewModel"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "schema": {
+              "$ref": "#/definitions/NewModel"
+            }
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "NewModel": {
+      "type": "string"
+    }
+  }
+}`);
+
+describe('preserves comments and styling when', ()=> {
+
+  describe('JSON is complex', ()=> {
+    // debugger
+    it('adds two new object hashes', ()=> {
+      let yawn = new YAWN(input);
+
+      yawn.json = newJson;
+
+      expect(yawn.yaml).to.equal(output);
+    });
+  });
+});