first commit

.eslintrc.json

@@ -1,13 +1,13 @@
 {
     "env": {
+        "browser": true,
         "commonjs": true,
         "es2021": true,
-        "node": true,
-        "jest": true
+        "jest":true
     },
     "extends": "eslint:recommended",
     "parserOptions": {
-        "ecmaVersion": "latest"
+        "ecmaVersion": 13
     },
     "rules": {
     }

index.js

@@ -7,7 +7,10 @@
  * trimProperties({ name: '  jane  ' }) // returns a new object { name: 'jane' }
  */
 function trimProperties(obj) {
-  // ✨ implement
+  for (let i in obj) {
+    obj[i] = obj[i].trim()
+  }
+  return obj
 }
 
 /**
@@ -19,7 +22,10 @@ function trimProperties(obj) {
  * trimPropertiesMutation({ name: '  jane  ' }) // returns the object mutated in place { name: 'jane' }
  */
 function trimPropertiesMutation(obj) {
-  // ✨ implement
+  for (let i in obj) {
+    obj[i] = obj[i].trim()
+  }
+  return obj
 }
 
 /**
@@ -31,7 +37,12 @@ function trimPropertiesMutation(obj) {
  * findLargestInteger([{ integer: 1 }, { integer: 3 }, { integer: 2 }]) // returns 3
  */
 function findLargestInteger(integers) {
-  // ✨ implement
+  let largest = 0
+  for (let i = 0; i < integers.length; i++){
+    if (integers[i].integer > largest) {
+      largest = integers[i].integer
+    }
+  }return largest
 }
 
 class Counter {

index.test.js

@@ -8,53 +8,70 @@ describe('[Exercise 1] trimProperties', () => {
     const actual = utils.trimProperties(input)
     expect(actual).toEqual(expected)
   })
-  // test('[2] returns a copy, leaving the original object intact', () => {})
+  test('[2] returns a copy, leaving the original object intact', () => {
+    const input = { foo: '  foo ', bar: 'bar ', baz: ' baz' }
+    const mutation = utils.trimProperties(input)
+    expect(mutation).toBeDefined()
+    expect(input).toEqual(input)
+  })
 })
 
 describe('[Exercise 2] trimPropertiesMutation', () => {
-  // test('[3] returns an object with the properties trimmed', () => {})
-  // test('[4] the object returned is the exact same one we passed in', () => {})
+  test('[3] returns an object with the properties trimmed', () => {
+    const input = { foo: '  foo ', bar: 'bar ', baz: ' baz' }
+    const trimmed = utils.trimProperties(input)
+    expect(trimmed).toBeDefined()
+    expect(input).toEqual(input)
+  })
+  test('[4] the object returned is the exact same one we passed in', () => {
+    const input = { foo: '  foo ', bar: 'bar ', baz: ' baz' }
+    expect(input).toEqual(input)
+  })
 })
 
 describe('[Exercise 3] findLargestInteger', () => {
-  // test('[5] returns the largest number in an array of objects { integer: 2 }', () => {})
-})
+  const integers = [{integer:1, integer:2, integer:3}]
+  test('[5] returns the largest number in an array of objects { integer: 2 }', () => {
 
-describe('[Exercise 4] Counter', () => {
-  let counter
-  beforeEach(() => {
-    counter = new utils.Counter(3) // each test must start with a fresh couter
+    expect (utils.findLargestInteger(integers)).toBe(3)
   })
-  // test('[6] the FIRST CALL of counter.countDown returns the initial count', () => {})
-  // test('[7] the SECOND CALL of counter.countDown returns the initial count minus one', () => {})
-  // test('[8] the count eventually reaches zero but does not go below zero', () => {})
 })
 
-describe('[Exercise 5] Seasons', () => {
-  let seasons
-  beforeEach(() => {
-    seasons = new utils.Seasons() // each test must start with fresh seasons
-  })
-  // test('[9] the FIRST call of seasons.next returns "summer"', () => {})
-  // test('[10] the SECOND call of seasons.next returns "fall"', () => {})
-  // test('[11] the THIRD call of seasons.next returns "winter"', () => {})
-  // test('[12] the FOURTH call of seasons.next returns "spring"', () => {})
-  // test('[13] the FIFTH call of seasons.next returns again "summer"', () => {})
-  // test('[14] the 40th call of seasons.next returns "spring"', () => {})
-})
+// describe('[Exercise 4] Counter', () => {
+//   let counter
+//   beforeEach(() => {
+//     counter = new utils.Counter(3) // each test must start with a fresh couter
+//   })
+//   // test('[6] the FIRST CALL of counter.countDown returns the initial count', () => {})
+//   // test('[7] the SECOND CALL of counter.countDown returns the initial count minus one', () => {})
+//   // test('[8] the count eventually reaches zero but does not go below zero', () => {})
+// })
 
-describe('[Exercise 6] Car', () => {
-  let focus
-  beforeEach(() => {
-    focus = new utils.Car('focus', 20, 30) // each test must start with a fresh car
-  })
-  // test('[15] driving the car returns the updated odometer', () => {})
-  // test('[16] driving the car uses gas', () => {})
-  // test('[17] refueling allows to keep driving', () => {})
-  // test('[18] adding fuel to a full tank has no effect', () => {})
-})
+// describe('[Exercise 5] Seasons', () => {
+//   let seasons
+//   beforeEach(() => {
+//     seasons = new utils.Seasons() // each test must start with fresh seasons
+//   })
+//   // test('[9] the FIRST call of seasons.next returns "summer"', () => {})
+//   // test('[10] the SECOND call of seasons.next returns "fall"', () => {})
+//   // test('[11] the THIRD call of seasons.next returns "winter"', () => {})
+//   // test('[12] the FOURTH call of seasons.next returns "spring"', () => {})
+//   // test('[13] the FIFTH call of seasons.next returns again "summer"', () => {})
+//   // test('[14] the 40th call of seasons.next returns "spring"', () => {})
+// })
 
-describe('[Exercise 7] isEvenNumberAsync', () => {
-  // test('[19] resolves true if passed an even number', () => {})
-  // test('[20] resolves false if passed an odd number', () => {})
-})
+// describe('[Exercise 6] Car', () => {
+//   let focus
+//   beforeEach(() => {
+//     focus = new utils.Car('focus', 20, 30) // each test must start with a fresh car
+//   })
+//   // test('[15] driving the car returns the updated odometer', () => {})
+//   // test('[16] driving the car uses gas', () => {})
+//   // test('[17] refueling allows to keep driving', () => {})
+//   // test('[18] adding fuel to a full tank has no effect', () => {})
+// })
+
+// describe('[Exercise 7] isEvenNumberAsync', () => {
+//   // test('[19] resolves true if passed an even number', () => {})
+//   // test('[20] resolves false if passed an odd number', () => {})
+// })

jest.config.js

@@ -11,9 +11,9 @@ module.exports = {
   // bail: 0,
 
   // The directory where Jest should store its cached dependency information
-  // cacheDirectory: "/private/var/folders/mq/wc13nlwj4gdgcyshdy5j1hgr0000gn/T/jest_dx",
+  // cacheDirectory: "/private/var/folders/27/bl_jm__s68n13g73b_xg0vtm0000gn/T/jest_dx",
 
-  // Automatically clear mock calls and instances between every test
+  // Automatically clear mock calls, instances and results before every test
   // clearMocks: false,
 
   // Indicates whether the coverage information should be collected while executing the test
@@ -101,7 +101,7 @@ module.exports = {
   // Use this configuration option to add custom reporters to Jest
   // reporters: undefined,
 
-  // Automatically reset mock state between every test
+  // Automatically reset mock state before every test
   // resetMocks: false,
 
   // Reset the module registry before running each individual test
@@ -110,7 +110,7 @@ module.exports = {
   // A path to a custom resolver
   // resolver: undefined,
 
-  // Automatically restore mock state between every test
+  // Automatically restore mock state and implementation before every test
   // restoreMocks: false,
 
   // The root directory that Jest should scan for tests and modules within