From 9dfe4551f0b649971f7afa8b543c35a4f5d6cf5d Mon Sep 17 00:00:00 2001 From: jjkusowski Date: Tue, 28 Nov 2017 14:24:47 -0800 Subject: [PATCH 1/6] Files scaffolded. First test written for map. --- lab-jeff/.eslintignore | 5 ++ lab-jeff/.eslintrc | 26 ++++++ lab-jeff/.gitignore | 148 +++++++++++++++++++++++++++++++++++ lab-jeff/README.md | 0 lab-jeff/__test__/fp.test.js | 11 +++ lab-jeff/lib/fp.js | 0 lab-jeff/package.json | 14 ++++ 7 files changed, 204 insertions(+) create mode 100644 lab-jeff/.eslintignore create mode 100644 lab-jeff/.eslintrc create mode 100644 lab-jeff/.gitignore create mode 100644 lab-jeff/README.md create mode 100644 lab-jeff/__test__/fp.test.js create mode 100644 lab-jeff/lib/fp.js create mode 100644 lab-jeff/package.json diff --git a/lab-jeff/.eslintignore b/lab-jeff/.eslintignore new file mode 100644 index 0000000..05b1cf3 --- /dev/null +++ b/lab-jeff/.eslintignore @@ -0,0 +1,5 @@ +**/node_modules/* +**/vendor/* +**/*.min.js +**/coverage/* +**/build/* diff --git a/lab-jeff/.eslintrc b/lab-jeff/.eslintrc new file mode 100644 index 0000000..840d336 --- /dev/null +++ b/lab-jeff/.eslintrc @@ -0,0 +1,26 @@ +{ + "env": { + "browser": true, + "node": true, + "commonjs": true, + "jest": true, + "es6": true + }, + "globals": { + "err": true, + "req": true, + "res": true, + "next": true + }, + "extends": "eslint:recommended", + "parserOptions": { + "sourceType": "module" + }, + "rules": { + "no-console": "off", + "indent": [ "error", 2 ], + "quotes": ["error", "single", { "allowTemplateLiterals": true }], + "comma-dangle": ["error", "always-multiline"], + "semi": [ "error", "always" ] + } +} diff --git a/lab-jeff/.gitignore b/lab-jeff/.gitignore new file mode 100644 index 0000000..8fe2634 --- /dev/null +++ b/lab-jeff/.gitignore @@ -0,0 +1,148 @@ +# Created by https://www.gitignore.io/api/osx,vim,node,linux,windows,visualstudiocode + +### Linux ### +*~ + +# temporary files which can be created if a process still has a handle open of a deleted file +.fuse_hidden* + +# KDE directory preferences +.directory + +# Linux trash folder which might appear on any partition or disk +.Trash-* + +# .nfs files are created when an open file is removed but is still being accessed +.nfs* + +### Node ### +# Logs +logs +*.log +npm-debug.log* +yarn-debug.log* +yarn-error.log* + +# Runtime data +pids +*.pid +*.seed +*.pid.lock + +# Directory for instrumented libs generated by jscoverage/JSCover +lib-cov + +# Coverage directory used by tools like istanbul +coverage + +# nyc test coverage +.nyc_output + +# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files) +.grunt + +# Bower dependency directory (https://bower.io/) +bower_components + +# node-waf configuration +.lock-wscript + +# Compiled binary addons (http://nodejs.org/api/addons.html) +build/Release + +# Dependency directories +node_modules/ +jspm_packages/ + +# Typescript v1 declaration files +typings/ + +# Optional npm cache directory +.npm + +# Optional eslint cache +.eslintcache + +# Optional REPL history +.node_repl_history + +# Output of 'npm pack' +*.tgz + +# Yarn Integrity file +.yarn-integrity + +# dotenv environment variables file +.env + + +### OSX ### +*.DS_Store +.AppleDouble +.LSOverride + +# Icon must end with two \r +Icon + +# Thumbnails +._* + +# Files that might appear in the root of a volume +.DocumentRevisions-V100 +.fseventsd +.Spotlight-V100 +.TemporaryItems +.Trashes +.VolumeIcon.icns +.com.apple.timemachine.donotpresent + +# Directories potentially created on remote AFP share +.AppleDB +.AppleDesktop +Network Trash Folder +Temporary Items +.apdisk + +### Vim ### +# swap +[._]*.s[a-v][a-z] +[._]*.sw[a-p] +[._]s[a-v][a-z] +[._]sw[a-p] +# session +Session.vim +# temporary +.netrwhist +# auto-generated tag files +tags + +### VisualStudioCode ### +.vscode/* +!.vscode/settings.json +!.vscode/tasks.json +!.vscode/launch.json +!.vscode/extensions.json +.history + +### Windows ### +# Windows thumbnail cache files +Thumbs.db +ehthumbs.db +ehthumbs_vista.db + +# Folder config file +Desktop.ini + +# Recycle Bin used on file shares +$RECYCLE.BIN/ + +# Windows Installer files +*.cab +*.msi +*.msm +*.msp + +# Windows shortcuts +*.lnk + +# End of https://www.gitignore.io/api/osx,vim,node,linux,windows,visualstudiocode diff --git a/lab-jeff/README.md b/lab-jeff/README.md new file mode 100644 index 0000000..e69de29 diff --git a/lab-jeff/__test__/fp.test.js b/lab-jeff/__test__/fp.test.js new file mode 100644 index 0000000..32b6aed --- /dev/null +++ b/lab-jeff/__test__/fp.test.js @@ -0,0 +1,11 @@ +'use strict'; + +const fp = require('../lib/fp'); + +describe('fp.js', () => { + describe('fp.map', () => { + test('map should return a new array which applies a function to each value of input array', () => { + expect(fp.map(x => x * 2, [1,2,3])).toEqual([2,4,6]); + }); + }); +}); diff --git a/lab-jeff/lib/fp.js b/lab-jeff/lib/fp.js new file mode 100644 index 0000000..e69de29 diff --git a/lab-jeff/package.json b/lab-jeff/package.json new file mode 100644 index 0000000..0a17971 --- /dev/null +++ b/lab-jeff/package.json @@ -0,0 +1,14 @@ +{ + "name": "lab-jeff", + "version": "1.0.0", + "description": "", + "main": "index.js", + "directories": { + "lib": "lib" + }, + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "author": "", + "license": "ISC" +} From 7574b1da04882c4c1e59903186494ecd7cf46f81 Mon Sep 17 00:00:00 2001 From: jjkusowski Date: Tue, 28 Nov 2017 14:43:50 -0800 Subject: [PATCH 2/6] map function and test pass with good data. --- lab-jeff/__test__/fp.test.js | 1 + lab-jeff/lib/fp.js | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/lab-jeff/__test__/fp.test.js b/lab-jeff/__test__/fp.test.js index 32b6aed..90c0ff5 100644 --- a/lab-jeff/__test__/fp.test.js +++ b/lab-jeff/__test__/fp.test.js @@ -6,6 +6,7 @@ describe('fp.js', () => { describe('fp.map', () => { test('map should return a new array which applies a function to each value of input array', () => { expect(fp.map(x => x * 2, [1,2,3])).toEqual([2,4,6]); + expect(fp.map(x => x, 'hello')).toEqual(['h', 'e', 'l', 'l', 'o']); }); }); }); diff --git a/lab-jeff/lib/fp.js b/lab-jeff/lib/fp.js index e69de29..9eb9bf7 100644 --- a/lab-jeff/lib/fp.js +++ b/lab-jeff/lib/fp.js @@ -0,0 +1,8 @@ +'use strict'; + +const fp = module.exports = {}; + +fp.map = (callback, collection) => { + return Array.prototype.map.call(collection, callback); + +}; From 6544c6e6b06983e5641e80cf6062c1c8b2a66ea9 Mon Sep 17 00:00:00 2001 From: jjkusowski Date: Tue, 28 Nov 2017 15:27:25 -0800 Subject: [PATCH 3/6] map function, tests, and exceptions complete. --- lab-jeff/__test__/fp.test.js | 16 + lab-jeff/lib/fp.js | 4 + lab-jeff/package-lock.json | 1140 ++++++++++++++++++++++++++++++++++ lab-jeff/package.json | 8 +- 4 files changed, 1166 insertions(+), 2 deletions(-) create mode 100644 lab-jeff/package-lock.json diff --git a/lab-jeff/__test__/fp.test.js b/lab-jeff/__test__/fp.test.js index 90c0ff5..b601434 100644 --- a/lab-jeff/__test__/fp.test.js +++ b/lab-jeff/__test__/fp.test.js @@ -8,5 +8,21 @@ describe('fp.js', () => { expect(fp.map(x => x * 2, [1,2,3])).toEqual([2,4,6]); expect(fp.map(x => x, 'hello')).toEqual(['h', 'e', 'l', 'l', 'o']); }); + test('map should return exception if first input is not a function', () => { + expect( () => { + fp.map('not a function', [1,2,3]); + } + ).toThrow(); + }); + test('map should return exception if 2nd input is not an array or string', () => { + expect( () => { + fp.map(x => x * 2, true); + } + ).toThrow(); + expect( () => { + fp.map(x => x * 2, null); + } + ).toThrow(); + }); }); }); diff --git a/lab-jeff/lib/fp.js b/lab-jeff/lib/fp.js index 9eb9bf7..1b68491 100644 --- a/lab-jeff/lib/fp.js +++ b/lab-jeff/lib/fp.js @@ -3,6 +3,10 @@ const fp = module.exports = {}; fp.map = (callback, collection) => { + if (typeof callback !== 'function') + throw new TypeError(' should be a function()'); + if (!collection.length) + throw new TypeError(' should be a string or array'); return Array.prototype.map.call(collection, callback); }; diff --git a/lab-jeff/package-lock.json b/lab-jeff/package-lock.json new file mode 100644 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"https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz", + "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=", + "dev": true + }, + "write": { + "version": "0.2.1", + "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz", + "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=", + "dev": true, + "requires": { + "mkdirp": "0.5.1" + } + }, + "yallist": { + "version": "2.1.2", + "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz", + "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=", + "dev": true + } + } +} diff --git a/lab-jeff/package.json b/lab-jeff/package.json index 0a17971..09420ac 100644 --- a/lab-jeff/package.json +++ b/lab-jeff/package.json @@ -7,8 +7,12 @@ "lib": "lib" }, "scripts": { - "test": "echo \"Error: no test specified\" && exit 1" + "test": "jest -i --coverage", + "lint": "eslint ." }, "author": "", - "license": "ISC" + "license": "ISC", + "devDependencies": { + "eslint": "^4.12.0" + } } From c162a8e211d8e0b8a6359bfd28c8485579e9a382 Mon Sep 17 00:00:00 2001 From: jjkusowski Date: Tue, 28 Nov 2017 16:24:28 -0800 Subject: [PATCH 4/6] filter complete --- lab-jeff/__test__/fp.test.js | 21 +++++++++++++++++++-- lab-jeff/lib/fp.js | 7 +++++-- 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/lab-jeff/__test__/fp.test.js b/lab-jeff/__test__/fp.test.js index b601434..86c3f42 100644 --- a/lab-jeff/__test__/fp.test.js +++ b/lab-jeff/__test__/fp.test.js @@ -11,8 +11,7 @@ describe('fp.js', () => { test('map should return exception if first input is not a function', () => { expect( () => { fp.map('not a function', [1,2,3]); - } - ).toThrow(); + }).toThrow(); }); test('map should return exception if 2nd input is not an array or string', () => { expect( () => { @@ -26,3 +25,21 @@ describe('fp.js', () => { }); }); }); + +describe('fp.js', () => { + describe('fp.filter', () => { + test('filter should return an array of items which pass the callback', () => { + expect(fp.filter(x => x.length > 5, ['cat', 'dog', 'elephant'])).toEqual(['elephant']); + }); + test('filter should return exception if first input is not a function', () => { + expect( () => { + fp.filter('not a function', ['cat', 'dog', 'elephant']); + }).toThrow(); + }); + test('filter should return exception if 2nd input is not iterable', () => { + expect( () => { + fp.filter(x => x.length > 5, true); + }).toThrow(); + }); + }); +}); diff --git a/lab-jeff/lib/fp.js b/lab-jeff/lib/fp.js index 1b68491..cfa9db3 100644 --- a/lab-jeff/lib/fp.js +++ b/lab-jeff/lib/fp.js @@ -3,10 +3,13 @@ const fp = module.exports = {}; fp.map = (callback, collection) => { - if (typeof callback !== 'function') - throw new TypeError(' should be a function()'); if (!collection.length) throw new TypeError(' should be a string or array'); return Array.prototype.map.call(collection, callback); +}; +fp.filter = (callback, collection) => { + if (!collection.length) + throw new TypeError(' should be a string or array'); + return Array.prototype.filter.call(collection, callback); }; From 902a7081f899a28302416598ce68f87d2ebb541b Mon Sep 17 00:00:00 2001 From: jjkusowski Date: Tue, 28 Nov 2017 16:49:49 -0800 Subject: [PATCH 5/6] reduce complete --- lab-jeff/__test__/fp.test.js | 29 +++++++++++++++++++++++++++++ lab-jeff/lib/fp.js | 6 ++++++ 2 files changed, 35 insertions(+) diff --git a/lab-jeff/__test__/fp.test.js b/lab-jeff/__test__/fp.test.js index 86c3f42..e52b068 100644 --- a/lab-jeff/__test__/fp.test.js +++ b/lab-jeff/__test__/fp.test.js @@ -43,3 +43,32 @@ describe('fp.js', () => { }); }); }); + +describe('fp.js', () => { + describe('fp.reduce', () => { + test('reduce should return value of sum of the collection', () => { + expect(fp.reduce( (acc, curr) => { + return acc + curr; + }, + [1,2,3], + 0)).toEqual(6); + }); + test('reduce should return exception if first input is not a function', () => { + expect( () => { + fp.reduce(('not a function', [1,2,3], 0)).toThrow(); + }); + }); + test('reduce should return exception if 2nd input is not iterable', () => { + expect( () => { + fp.reduce( (acc, curr) => { + return acc + curr; + }, true, 0); + }).toThrow(); + expect( () => { + fp.reduce( (acc, curr) => { + return acc + curr; + }, null, 0); + }).toThrow(); + }); + }); +}); diff --git a/lab-jeff/lib/fp.js b/lab-jeff/lib/fp.js index cfa9db3..5c3da4e 100644 --- a/lab-jeff/lib/fp.js +++ b/lab-jeff/lib/fp.js @@ -13,3 +13,9 @@ fp.filter = (callback, collection) => { throw new TypeError(' should be a string or array'); return Array.prototype.filter.call(collection, callback); }; + +fp.reduce = (callback, collection, initValue) => { + if (!collection.length) + throw new TypeError(' should be a string or array'); + return Array.prototype.reduce.call(collection, callback, initValue); +}; From e9d10298a75e0488d76ef191b1ad5f2eb80736f3 Mon Sep 17 00:00:00 2001 From: jjkusowski Date: Tue, 28 Nov 2017 17:40:59 -0800 Subject: [PATCH 6/6] readme complete --- lab-jeff/README.md | 22 ++++++++++++++++++++++ lab-jeff/__test__/fp.test.js | 24 ++++++++++++++++++++++++ lab-jeff/lib/fp.js | 6 ++++++ 3 files changed, 52 insertions(+) diff --git a/lab-jeff/README.md b/lab-jeff/README.md index e69de29..536baaa 100644 --- a/lab-jeff/README.md +++ b/lab-jeff/README.md @@ -0,0 +1,22 @@ +# Code 401 lab 2 + +## Purpose +The purpose of this lab is to learn Test Driven Development (TDD) when writing code. We are using jest.js to test our code. + +## File Structure +There are two test files in the __test__ folder which test the functions included in the module in the lib folder. + +## greet module +The fp module contains four functions: map, filter, reduce, and slice. + +### fp.map +fp.map expects 2 arguments: a function and an array of data. If a function and an array are passed in, it iterates over the array and applies the function to each one, returning an array with the results of those function calls. If the first argument is not a function or the second argument is not an array (or string), it throws a TypeError. + +### fp.filter +This function takes two arguments: a function and an array of data. With valid data, it returns a new array with all elements that pass the test implemented by the provided function. If the first argument is not a function or the second argument is not an array (or string), it throws a TypeError. + +### fp.reduce +This function takes three arguments: a function, an array of data, and an initial value. With valid data, it applies a function against an accumulator and each element in the array (from left to right) to reduce it to a single value, which it returns. If the first argument is not a function or the second argument is not an array (or string), it throws a TypeError. + +### fp.slice +This function takes three arguments: a beginning index, an ending index, and an array. With valid data, it returns a portion of the array into a new array selected from begin to end (end not included). If the first or second arguments are not integers, or the third argument is not an array (or string), it throws a TypeError. diff --git a/lab-jeff/__test__/fp.test.js b/lab-jeff/__test__/fp.test.js index e52b068..3de8626 100644 --- a/lab-jeff/__test__/fp.test.js +++ b/lab-jeff/__test__/fp.test.js @@ -72,3 +72,27 @@ describe('fp.js', () => { }); }); }); + +describe('fp.js', () => { + describe('fp.slice', () => { + test('slice should return a portion of the given array from begin to end', () => { + expect(fp.slice(0, 2, ['cat', 'dog', 'elephant'])).toEqual(['cat', 'dog']); + }); + test('slice throws an exception if the first or second arguments are not integers', () => { + expect( () => { + fp.slice((1.2, 2, ['cat', 'dog', 'elephant'])).toThrow(); + }); + expect( () => { + fp.slice((1, '', ['cat', 'dog', 'elephant'])).toThrow(); + }); + }); + test('slice throws an exception if the 3rd argument is not iterable', () => { + expect( () => { + fp.slice((0, 2, 1)).toThrow(); + }); + expect( () => { + fp.slice((0, 2, '')).toThrow(); + }); + }); + }); +}); diff --git a/lab-jeff/lib/fp.js b/lab-jeff/lib/fp.js index 5c3da4e..9beaaf6 100644 --- a/lab-jeff/lib/fp.js +++ b/lab-jeff/lib/fp.js @@ -19,3 +19,9 @@ fp.reduce = (callback, collection, initValue) => { throw new TypeError(' should be a string or array'); return Array.prototype.reduce.call(collection, callback, initValue); }; + +fp.slice = (begin, end, collection) => { + if (!collection.length) + throw new TypeError(' should be a string or array'); + return Array.prototype.slice.call(collection, begin, end); +};