Handle escaped double quotes in JSON (#33)

* Add test case for escaped double quotes

* Validate syntax in tests

* Produce valid escaped JSON

src/index.js

@@ -33,7 +33,9 @@ module.exports = function (source) {
     return `module.exports = ${value}`
   }
 
-  return `module.exports = JSON.parse(\`${JSON.stringify(value)}\`)`
+  // the outer JSON.stringify is parsed by JavaScript
+  // the inner JSON.stringify is parsed by JSON.parse
+  return `module.exports = JSON.parse(${JSON.stringify(JSON.stringify(value))})`
 }
 
 exports.raw = true

test/fixtures/file-big.json

@@ -1330,6 +1330,8 @@
     },
     {
       "with-single-quotes": "this 'should' also work"
+    },
+    {
+      "with-double-\"quotes\"": "this \"should\" also work"
     }
-  ]
-
+]

test/loader-big.test.js

@@ -15,5 +15,8 @@ describe('Loader', () => {
 
     // this will fail when there is an error e.g: `throw new Error...`
     expect(source.startsWith('module.exports = JSON.parse')).toEqual(true)
+
+    // validate syntax
+    expect(() => eval(source)).not.toThrow()
   })
 })