improve the whats-a- stuff

other/whats-a-mock/__tests__/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "rules": {
+    "import/namespace": "off"
+  }
+}

other/whats-a-mock/__tests__/thumb-war.1.js

@@ -3,144 +3,10 @@ import * as utils from '../utils'
 
 test('returns winner', () => {
   const originalGetWinner = utils.getWinner
-  // change the getWinner implementation to a function
-  // that keeps track of how often it's called and
-  // the arguments it's called with (Hint #1)
-  // eslint-disable-next-line import/namespace
   utils.getWinner = (p1, p2) => p2
 
   const winner = thumbWar('Ken Wheeler', 'Kent C. Dodds')
   expect(winner).toBe('Kent C. Dodds')
-  // add an assertion for how many times the getWinner function
-  // was supposed to be called (2 times) (Hint #2)
-  //
-  // add another assertion that every time it was called
-  // it was called with the right arguments: 'Ken Wheeler', 'Kent C. Dodds'
-  // (Hint #3)
 
-  // eslint-disable-next-line import/namespace
   utils.getWinner = originalGetWinner
 })
-
-/*
-Hints below:
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-Hint #1:
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-There's nothing too magical going on here, you just need some place to store the state for every time the function is
-called. Something like this should do just fine (Sorry, this is the solution I have. I couldn't think of a way to hint
-at it without totally giving it away or leading you astray):
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-utils.getWinner = (...args) => {
-  utils.getWinner.mock.calls.push(args)
-  return args[1]
-}
-utils.getWinner.mock = {calls: []}
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-Hint #2:
-Depending on how you store the state of how many times it's been called, you might either do this:
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-expect(timesCalled).toBe(2)
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-Or you might do this:
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-expect(utils.getWinner.mock.calls).toHaveLength(2)
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-Either way is fine.
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-Hint #3:
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-You can have assertions within a forEach and that's not entirely uncommon. Depending on how you're storing the state
-of the arguments its called with you might do this (#spoileralert this is the solution... sorry):
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-utils.getWinner.mock.calls.forEach(args => {
-  expect(args).toEqual(['Ken Wheeler', 'Kent C. Dodds'])
-})
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- */

other/whats-a-mock/__tests__/thumb-war.0.js → other/whats-a-mock/__tests__/thumb-war.1.todo.js

@@ -1,3 +1,4 @@
+// monkey-patching
 import thumbWar from '../thumb-war'
 // import the utils module (see hint #1 at the bottom of the file)
 

other/whats-a-mock/__tests__/thumb-war.2.js

@@ -3,8 +3,6 @@ import * as utils from '../utils'
 
 test('returns winner', () => {
   const originalGetWinner = utils.getWinner
-  // change this to a jest mock function (Hint #1)
-  // eslint-disable-next-line import/namespace
   utils.getWinner = (...args) => {
     utils.getWinner.mock.calls.push(args)
     return args[1]
@@ -13,88 +11,10 @@ test('returns winner', () => {
 
   const winner = thumbWar('Ken Wheeler', 'Kent C. Dodds')
   expect(winner).toBe('Kent C. Dodds')
-  // change this to the built-in jest assertion for how many times a mock
-  // function was called (use toHaveBeenCalledTimes) (Hint #2)
   expect(utils.getWinner.mock.calls).toHaveLength(2)
   utils.getWinner.mock.calls.forEach(args => {
     expect(args).toEqual(['Ken Wheeler', 'Kent C. Dodds'])
   })
 
-  // eslint-disable-next-line import/namespace
   utils.getWinner = originalGetWinner
 })
-
-/*
-Hints below
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-Hint #1:
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-You can create a jest mock function with `jest.fn()`:
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-const myMockFunction = jest.fn((greeting, name) => `${greeting} ${name}`)
-myMockFunction('Hey', 'Joe') // returns 'Hey Joe'
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-Jest keeps track of mock function metadata the same way we did (via myMockFunction.mock.calls)
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-Hint #2:
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-You can assert the number of times called with:
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-expect(myMockFunction).toHaveBeenCalledTimes(1)
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- */