.

Author: ChristianOellers

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+max_line_length = 140
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

.gitattributes

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+# https://html5boilerplate.com
+
+## AUTO-DETECT
+* text=auto
+
+## SOURCE CODE
+*.bat      text eol=crlf
+*.coffee   text
+*.css      text
+*.htm      text
+*.html     text
+*.inc      text
+*.ini      text
+*.js       text
+*.json     text
+*.jsx      text
+*.less     text
+*.od       text
+*.onlydata text
+*.php      text
+*.pl       text
+*.py       text
+*.rb       text
+*.sass     text
+*.scm      text
+*.scss     text
+*.sh       text eol=lf
+*.sql      text
+*.styl     text
+*.tag      text
+*.ts       text
+*.tsx      text
+*.xml      text
+*.xhtml    text
+
+## DOCKER
+*.dockerignore text
+Dockerfile     text
+
+## DOCUMENTATION
+*.markdown   text
+*.md         text
+*.mdwn       text
+*.mdown      text
+*.mkd        text
+*.mkdn       text
+*.mdtxt      text
+*.mdtext     text
+*.txt        text
+AUTHORS      text
+CHANGELOG    text
+CHANGES      text
+CONTRIBUTING text
+COPYING      text
+copyright    text
+*COPYRIGHT*  text
+INSTALL      text
+license      text
+LICENSE      text
+NEWS         text
+readme       text
+*README*     text
+TODO         text
+
+## TEMPLATES
+*.dot        text
+*.ejs        text
+*.haml       text
+*.handlebars text
+*.hbs        text
+*.hbt        text
+*.jade       text
+*.latte      text
+*.mustache   text
+*.njk        text
+*.phtml      text
+*.tmpl       text
+*.tpl        text
+*.twig       text
+
+## LINTERS
+.babelrc      text
+.csslintrc    text
+.eslintrc     text
+.htmlhintrc   text
+.jscsrc       text
+.jshintrc     text
+.jshintignore text
+.prettierrc   text
+.stylelintrc  text
+
+## CONFIGS
+*.bowerrc       text
+*.cnf           text
+*.conf          text
+*.config        text
+.browserslistrc text
+.editorconfig   text
+.gitattributes  text
+.gitconfig      text
+.gitignore      text
+.htaccess       text
+*.npmignore     text
+*.yaml          text
+*.yml           text
+browserslist    text
+Makefile        text
+makefile        text
+
+## HEROKU
+Procfile    text
+.slugignore text
+
+## GRAPHICS
+*.ai   binary
+*.bmp  binary
+*.eps  binary
+*.gif  binary
+*.ico  binary
+*.jng  binary
+*.jp2  binary
+*.jpg  binary
+*.jpeg binary
+*.jpx  binary
+*.jxr  binary
+*.pdf  binary
+*.png  binary
+*.psb  binary
+*.psd  binary
+*.svg  text
+*.svgz binary
+*.tif  binary
+*.tiff binary
+*.wbmp binary
+*.webp binary
+
+## AUDIO
+*.kar  binary
+*.m4a  binary
+*.mid  binary
+*.midi binary
+*.mp3  binary
+*.ogg  binary
+*.ra   binary
+
+## VIDEO
+*.3gpp binary
+*.3gp  binary
+*.as   binary
+*.asf  binary
+*.asx  binary
+*.fla  binary
+*.flv  binary
+*.m4v  binary
+*.mng  binary
+*.mov  binary
+*.mp4  binary
+*.mpeg binary
+*.mpg  binary
+*.ogv  binary
+*.swc  binary
+*.swf  binary
+*.webm binary
+
+## ARCHIVES
+*.7z  binary
+*.gz  binary
+*.jar binary
+*.rar binary
+*.tar binary
+*.zip binary
+
+## FONTS
+*.ttf   binary
+*.eot   binary
+*.otf   binary
+*.woff  binary
+*.woff2 binary
+
+## EXECUTABLES
+*.exe binary
+*.pyc binary

.gitignore

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+# Compiled output
+/build
+/dist
+/documentation
+/out-tsc
+/tmp
+
+# Composer
+./vendor
+composer.lock
+
+# Dependencies
+/node_modules
+package-lock.json
+
+# Environment
+.env
+
+# IDEs + Editors
+*.launch
+*.sublime-workspace
+/.idea
+.c9
+.classpath
+.history
+.project
+.settings
+
+# IDE - VSCode
+.vscode/*
+!.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/settings.json
+!.vscode/tasks.json
+
+# Misc
+/.sass-cache
+/connect.lock
+/coverage
+/libpeerconnection.log
+/typings
+npm-debug.log
+php_errorlog
+testem.log
+yarn-error.log
+
+# System files
+*/*.lnk
+*desktop.ini
+.DS_Store
+Thumbs.db

package.json

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+{
+  "name": "unit-testing",
+  "license": "UNLICENSED",
+  "private": true,
+  "scripts": {
+    "test": "npm run test:watch -- --colors",
+    "test:watch": "npx jest --watch",
+    "test:once": "npx jest"
+  },
+  "dependencies": {
+    "jest": "^26.6.3"
+  },
+  "type":"module",
+  "jest": {
+    "verbose": true
+  }
+}

tests/word-search.js

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+class WordSearch {
+  constructor(words) {
+    this.words = words;
+  }
+
+  search(text) {
+    if (!text) {
+      return [];
+    }
+    
+    return this.getWords(text);
+  }
+  
+  getWords(text) {
+    let results = this.words
+      .filter(word => text.length >= 2)
+      .filter(word => word.startsWith(text));
+
+    return results;
+  }
+}
+
+
+module.exports = WordSearch;
+

tests/word-search.test.js

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+/*
+1. Decide tiny aspects + Limitations (data requirements, responsibilities)
+2. Define input/output of feature (data types, structures, results)
+   Define function signature (parameters, variants)
+3. Define test case for each tiny feature (including misuse + expected fails)
+4. Write code
+
+---
+
+1.
+- Have: Word list [A, B, ...]
+  - Expect: All words to be strings, No empty values, 
+    No foreign/multibyte chars, Sorted A-Z, Upper/Lowercase
+- Have at least 2 letters to start searching
+- Get 1-N word(s) that start with letters
+- Return empty list for no results []
+
+2. + 3.
+- constructor(array words)
+- getWordsForText(string text): array[string]
+
+4.
+- No results : ''
+- No results : 'A'
+- 2 results  : 'Ap'
+- 1 result   : 'App'
+
+*/
+
+const WordSearch = require('./word-search');
+
+
+describe('Word search', () => {
+  const words = [
+    'Apple',
+    'Apricot',
+    'Avocado',
+    'Banana',
+    'Broccoli',
+    'Cucumber',
+    '',
+  ];
+
+  const wordSearch = new WordSearch(words);
+
+  test('no results for empty value', () => {
+    const result = wordSearch.search('');
+    expect(result).toStrictEqual([]);
+  });
+
+  test('no results for single letter', () => {
+    const result = wordSearch.search('A');
+    expect(result).toStrictEqual([]);
+  });
+
+  test('2 results for letter combination available > 1 times', () => {
+    const result = wordSearch.search('Ap');
+    expect(result).toStrictEqual(['Apple', 'Apricot']);
+  });
+
+  test('1 result for letter combination available = 1 time', () => {
+    const result = wordSearch.search('App');
+    expect(result).toStrictEqual(['Apple']);
+  });
+
+});
+
+
+
+
+/*
+
+toStrictEqual // Type + Structure
+toBe          // Primitives, References
+toEqual       // Deep/Recursive object equality
+toBeTruthy    //
+toBeFalsy     //
+toBeCloseTo   // Float
+
+*/
+