add selectTasksWithColor (generates color for the linked tasks)

babel.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  "env": {
+    "test": {
+      "presets": [
+        ["@babel/preset-env", {
+          "targets": {
+            "node": "current",
+          }
+        }]
+      ]
+    }
+  }
+}

index.js

@@ -0,0 +1,5 @@
+import { selectTasksWithColor } from './src/redux/Dispatch/selectors'
+
+export {
+    selectTasksWithColor
+}

jest.config.js

@@ -0,0 +1,181 @@
+// For a detailed explanation regarding each configuration property, visit:
+// https://jestjs.io/docs/en/configuration.html
+
+module.exports = {
+  // All imported modules in your tests should be mocked automatically
+  // automock: false,
+
+  // Stop running tests after the first failure
+  // bail: false,
+
+  // Respect "browser" field in package.json when resolving modules
+  // browser: false,
+
+  // The directory where Jest should store its cached dependency information
+  // cacheDirectory: "/tmp/jest_0",
+
+  // Automatically clear mock calls and instances between every test
+  clearMocks: true,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  // collectCoverage: false,
+
+  // An array of glob patterns indicating a set of files for which coverage information should be collected
+  // collectCoverageFrom: null,
+
+  // The directory where Jest should output its coverage files
+  // coverageDirectory: null,
+
+  // An array of regexp pattern strings used to skip coverage collection
+  // coveragePathIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  // coverageReporters: [
+  //   "json",
+  //   "text",
+  //   "lcov",
+  //   "clover"
+  // ],
+
+  // An object that configures minimum threshold enforcement for coverage results
+  // coverageThreshold: null,
+
+  // Make calling deprecated APIs throw helpful error messages
+  // errorOnDeprecated: false,
+
+  // Force coverage collection from ignored files usin a array of glob patterns
+  // forceCoverageMatch: [],
+
+  // A path to a module which exports an async function that is triggered once before all test suites
+  // globalSetup: null,
+
+  // A path to a module which exports an async function that is triggered once after all test suites
+  // globalTeardown: null,
+
+  // A set of global variables that need to be available in all test environments
+  // globals: {},
+
+  // An array of directory names to be searched recursively up from the requiring module's location
+  // moduleDirectories: [
+  //   "node_modules"
+  // ],
+
+  // An array of file extensions your modules use
+  // moduleFileExtensions: [
+  //   "js",
+  //   "json",
+  //   "jsx",
+  //   "node"
+  // ],
+
+  // A map from regular expressions to module names that allow to stub out resources with a single module
+  // moduleNameMapper: {},
+
+  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+  // modulePathIgnorePatterns: [],
+
+  // Activates notifications for test results
+  // notify: false,
+
+  // An enum that specifies notification mode. Requires { notify: true }
+  // notifyMode: "always",
+
+  // A preset that is used as a base for Jest's configuration
+  // preset: null,
+
+  // Run tests from one or more projects
+  // projects: null,
+
+  // Use this configuration option to add custom reporters to Jest
+  // reporters: undefined,
+
+  // Automatically reset mock state between every test
+  // resetMocks: false,
+
+  // Reset the module registry before running each individual test
+  // resetModules: false,
+
+  // A path to a custom resolver
+  // resolver: null,
+
+  // Automatically restore mock state between every test
+  // restoreMocks: false,
+
+  // The root directory that Jest should scan for tests and modules within
+  // rootDir: null,
+
+  // A list of paths to directories that Jest should use to search for files in
+  roots: [
+    "src/"
+  ],
+
+  // Allows you to use a custom runner instead of Jest's default test runner
+  // runner: "jest-runner",
+
+  // The paths to modules that run some code to configure or set up the testing environment before each test
+  // setupFiles: [],
+
+  // The path to a module that runs some code to configure or set up the testing framework before each test
+  // setupTestFrameworkScriptFile: null,
+
+  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+  // snapshotSerializers: [],
+
+  // The test environment that will be used for testing
+  // testEnvironment: "jest-environment-jsdom",
+
+  // Options that will be passed to the testEnvironment
+  // testEnvironmentOptions: {},
+
+  // Adds a location field to test results
+  // testLocationInResults: false,
+
+  // The glob patterns Jest uses to detect test files
+  // testMatch: [
+  //   "**/__tests__/**/*.js?(x)",
+  //   "**/?(*.)+(spec|test).js?(x)"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+  testPathIgnorePatterns: [
+    "/node_modules/",
+    "/vendor/"
+  ],
+
+  // The regexp pattern Jest uses to detect test files
+  // testRegex: "",
+
+  // This option allows the use of a custom results processor
+  // testResultsProcessor: null,
+
+  // This option allows use of a custom test runner
+  // testRunner: "jasmine2",
+
+  // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
+  // testURL: "http://localhost",
+
+  // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
+  // timers: "real",
+
+  // A map from regular expressions to paths to transformers
+  // transform: null,
+
+  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+  // transformIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
+  // unmockedModulePathPatterns: undefined,
+
+  // Indicates whether each individual test should be reported during the run
+  // verbose: null,
+
+  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+  // watchPathIgnorePatterns: [],
+
+  // Whether to use watchman for file crawling
+  // watchman: true,
+};

package.json

@@ -0,0 +1,22 @@
+{
+  "name": "coopcycle-frontend-js",
+  "version": "1.0.1",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "jest --config jest.config.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "lodash": "^4.17.15",
+    "redux": "^4.0.5",
+    "reselect": "^4.0.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.10.4",
+    "@babel/preset-env": "^7.10.4",
+    "babel-jest": "^26.1.0",
+    "jest": "^26.1.0"
+  }
+}

src/redux/Dispatch/__tests__/utils.js

@@ -0,0 +1,120 @@
+import {
+  groupLinkedTasks,
+} from '../utils.js'
+
+describe('groupLinkedTasks', () => {
+
+  it('should group when tasks are ordered', () => {
+
+    const tasks = [
+      {
+        '@id': '/api/tasks/1',
+        id : 1,
+        next: '/api/tasks/2',
+      }, {
+        '@id': '/api/tasks/2',
+        id : 2,
+        previous: '/api/tasks/1',
+      }, {
+        '@id': '/api/tasks/3',
+        id : 3,
+      }
+    ]
+
+    const groups = groupLinkedTasks(tasks)
+
+    expect(groups).toEqual({
+      '/api/tasks/1': [ 1, 2 ],
+      '/api/tasks/2': [ 1, 2 ],
+    })
+  })
+
+  it('should group when tasks are not ordered', () => {
+
+    const tasks = [
+      {
+        '@id': '/api/tasks/2',
+        id : 2,
+        previous: '/api/tasks/1',
+      }, {
+        '@id': '/api/tasks/1',
+        id : 1,
+        next: '/api/tasks/2',
+      },  {
+        '@id': '/api/tasks/3',
+        id : 3,
+      }
+    ]
+
+    const groups = groupLinkedTasks(tasks)
+
+    expect(groups).toEqual({
+      '/api/tasks/1': [ 1, 2 ],
+      '/api/tasks/2': [ 1, 2 ],
+    })
+  })
+
+  it('should group when there are more than 2 tasks', () => {
+
+    const tasks = [
+      {
+        '@id': '/api/tasks/1',
+        id : 1,
+        next: '/api/tasks/2',
+      }, {
+        '@id': '/api/tasks/2',
+        id : 2,
+        previous: '/api/tasks/1',
+        next: '/api/tasks/3',
+      }, {
+        '@id': '/api/tasks/3',
+        id : 3,
+        previous: '/api/tasks/2',
+      }
+    ]
+
+    const groups = groupLinkedTasks(tasks)
+
+    expect(groups).toEqual({
+      '/api/tasks/1': [ 1, 2, 3 ],
+      '/api/tasks/2': [ 1, 2, 3 ],
+      '/api/tasks/3': [ 1, 2, 3 ],
+    })
+  })
+
+  it('should group multiple', () => {
+
+    const tasks = [
+      {
+        '@id': '/api/tasks/1',
+        id : 1,
+        next: '/api/tasks/2',
+      }, {
+        '@id': '/api/tasks/2',
+        id : 2,
+        previous: '/api/tasks/1',
+      }, {
+        '@id': '/api/tasks/3',
+        id : 3,
+      },{
+        '@id': '/api/tasks/4',
+        id : 4,
+        next: '/api/tasks/5',
+      }, {
+        '@id': '/api/tasks/5',
+        id : 5,
+        previous: '/api/tasks/4',
+      }
+    ]
+
+    const groups = groupLinkedTasks(tasks)
+
+    expect(groups).toEqual({
+      '/api/tasks/1': [ 1, 2 ],
+      '/api/tasks/2': [ 1, 2 ],
+      '/api/tasks/4': [ 4, 5 ],
+      '/api/tasks/5': [ 4, 5 ],
+    })
+  })
+
+})

src/redux/Dispatch/selectors.js

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+import { createSelector } from 'reselect'
+import { mapValues } from 'lodash'
+import { integerToColor, groupLinkedTasks } from './utils'
+
+export const selectTasksWithColor = createSelector(
+  state => state.allTasks,
+  allTasks =>
+    mapValues(groupLinkedTasks(allTasks), taskIds => integerToColor(taskIds.reduce((accumulator, value) => accumulator + value)))
+)