README + normalizeError fixed, tests added

Author: lsimone

README.md

@@ -87,7 +87,7 @@ fetch.mockResponse(() => callMyApi().then(res => ({body: res}))
 The same goes for rejects:
 
 ```
-fetch.mockReject(() => doMyAsyncJob().then(res => res.errorToRaise))
+fetch.mockReject(() => doMyAsyncJob().then(res => Promise.reject(res.errorToRaise)))
 ```
 
 ### Mock utilities

src/index.js

@@ -42,9 +42,9 @@ const normalizeResponse = (bodyOrFunction, init) => () => isFn(bodyOrFunction) ?
     bodyOrFunction().then(({body, init}) => new ResponseWrapper(body, init)) :
     Promise.resolve(new ResponseWrapper(bodyOrFunction, init))
 
-const normalizeError = errorOrFunction => () => isFn(errorOrFunction) ?
-    errorOrFunction :
-    () => Promise.reject(errorOrFunction)
+const normalizeError = errorOrFunction =>  isFn(errorOrFunction) ?
+  errorOrFunction :
+  () => Promise.reject(errorOrFunction)
 
 const fetch = jest.fn()
 fetch.Headers = Headers

tests/test.js

@@ -181,4 +181,30 @@ describe('request', () => {
         done()
       })
   })
+
+  it('resolves with function', done => {
+      fetch.mockResponseOnce(() => Promise.resolve({body: 'ok'}))
+
+    request()
+      .then(response => {
+          expect(response).toEqual('ok')
+          done()
+      })
+      .catch(done.fail)
+  })
+
+  it('rejects with function', done => {
+    const errorData = {
+      error:
+        'Uh oh, something has gone wrong. Please tweet us @randomapi about the issue. Thank you.'
+    }
+    fetch.mockRejectOnce(() => Promise.reject(JSON.stringify(errorData)))
+
+    request()
+      .then(done.fail)
+      .catch(error => {
+        expect(error.message).toBe(errorData.error)
+        done()
+      })
+  })
 })