chore: convert mocha to jest (#190)

Author: gagoar

.eslintrc

@@ -7,6 +7,7 @@
   ],
 
   "env": {
+    "jest": true, 
     "browser": true,
     "es6": true,
     "node": true

jest.config.js

@@ -0,0 +1,18 @@
+const packageJSON = require('./package.json');
+
+process.env.TZ = 'UTC';
+
+module.exports = {
+  verbose: true,
+  name: packageJSON.name,
+  displayName: packageJSON.name,
+  transform: {
+    '\\.[jt]sx?$': 'babel-jest',
+  },
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  testURL: 'http://localhost',
+  transformIgnorePatterns: ['[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$'],
+  testMatch: ['**/*.(spec|test).js'],
+  collectCoverage: true,
+  coverageDirectory: './coverage/',
+};

package-lock.json

@@ -17,9 +17,6 @@
   "engines": {
     "node": ">=6.0.0"
   },
-  "options": {
-    "mocha": "--require babel-register --require scripts/mocha-bootload src/**/__tests__/*.js"
-  },
   "browserify": {
     "transform": [
       "babelify"
@@ -33,7 +30,7 @@
     "start": "node lib/server",
     "watch": "babel scripts/watch.js | node",
     "test": "npm run lint && npm run check && npm run test:only",
-    "test:only": "mocha $npm_package_options_mocha",
+    "test:only": "jest",
     "lint": "eslint src handler",
     "lint:fix": "eslint --fix src handler",
     "check": "flow check",
@@ -58,25 +55,26 @@
     "graphql-relay": "0.6.0"
   },
   "devDependencies": {
+    "@babel/core": "^7.12.3",
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.3",
+    "babel-jest": "^26.6.3",
     "babel-plugin-syntax-async-functions": "6.13.0",
     "babel-plugin-syntax-object-rest-spread": "^6.13.0",
     "babel-plugin-transform-flow-strip-types": "^6.22.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-plugin-transform-runtime": "^6.23.0",
     "babel-preset-env": "^1.7.0",
     "babel-register": "^6.26.0",
-    "chai": "^4.2.0",
     "coveralls": "^3.0.4",
     "eslint": "^5.16.0",
     "eslint-plugin-babel": "5.3.0",
     "eslint-plugin-prettier": "^3.1.0",
     "flow-bin": "^0.69.0",
     "isomorphic-fetch": "2.2.1",
     "isparta": "^4.1.1",
-    "mocha": "^6.1.4",
+    "jest": "^26.6.3",
     "netlify-lambda": "^1.6.3",
     "prettier": "^1.18.2",
     "sane": "^4.1.0"

package.json

@@ -6,32 +6,30 @@
  * LICENSE-examples file in the root directory of this source tree.
  */
 
-import { expect } from 'chai';
-import { describe, it } from 'mocha';
 import { getFromLocalUrl } from '../local';
 
 describe('Local API Wrapper', () => {
   it('Gets a person', async () => {
     const luke = await getFromLocalUrl('https://swapi.dev/api/people/1/');
-    expect(luke.name).to.equal('Luke Skywalker');
+    expect(luke.name).toBe('Luke Skywalker');
     const threePO = await getFromLocalUrl('https://swapi.dev/api/people/2/');
-    expect(threePO.name).to.equal('C-3PO');
+    expect(threePO.name).toBe('C-3PO');
   });
 
   it('Gets pages', async () => {
     const firstPeople = await getFromLocalUrl('https://swapi.dev/api/people/');
-    expect(firstPeople.results.length).to.equal(10);
-    expect(firstPeople.results[0].name).to.equal('Luke Skywalker');
+    expect(firstPeople.results.length).toBe(10);
+    expect(firstPeople.results[0].name).toBe('Luke Skywalker');
     const secondPeople = await getFromLocalUrl(
       'https://swapi.dev/api/people/?page=2',
     );
-    expect(secondPeople.results.length).to.equal(10);
-    expect(secondPeople.results[0].name).to.equal('Anakin Skywalker');
+    expect(secondPeople.results.length).toBe(10);
+    expect(secondPeople.results[0].name).toBe('Anakin Skywalker');
   });
 
   it('Gets first page by default', async () => {
     const people = await getFromLocalUrl('https://swapi.dev/api/people/');
-    expect(people.results.length).to.equal(10);
-    expect(people.results[0].name).to.equal('Luke Skywalker');
+    expect(people.results.length).toBe(10);
+    expect(people.results[0].name).toBe('Luke Skywalker');
   });
 });

src/api/__tests__/local.js src/api/__tests__/local.spec.js

@@ -6,9 +6,6 @@
  * LICENSE-examples file in the root directory of this source tree.
  */
 
-import { expect } from 'chai';
-import { describe, it } from 'mocha';
-
 import {
   getObjectFromUrl,
   getObjectsByType,
@@ -18,22 +15,22 @@ import {
 describe('API Helper', () => {
   it('Gets a person', async () => {
     const luke = await getObjectFromUrl('https://swapi.dev/api/people/1/');
-    expect(luke.name).to.equal('Luke Skywalker');
+    expect(luke.name).toBe('Luke Skywalker');
     const threePO = await getObjectFromUrl('https://swapi.dev/api/people/2/');
-    expect(threePO.name).to.equal('C-3PO');
+    expect(threePO.name).toBe('C-3PO');
   });
 
   it('Gets all pages at once', async () => {
     const { objects, totalCount } = await getObjectsByType('people');
-    expect(objects.length).to.equal(82);
-    expect(totalCount).to.equal(82);
-    expect(objects[0].name).to.equal('Luke Skywalker');
+    expect(objects.length).toBe(82);
+    expect(totalCount).toBe(82);
+    expect(objects[0].name).toBe('Luke Skywalker');
   });
 
   it('Gets a person by ID', async () => {
     const luke = await getObjectFromTypeAndId('people', 1);
-    expect(luke.name).to.equal('Luke Skywalker');
+    expect(luke.name).toBe('Luke Skywalker');
     const threePO = await getObjectFromTypeAndId('people', 2);
-    expect(threePO.name).to.equal('C-3PO');
+    expect(threePO.name).toBe('C-3PO');
   });
 });

src/schema/__tests__/apiHelper.js src/schema/__tests__/apiHelper.spec.js

@@ -6,8 +6,6 @@
  * LICENSE-examples file in the root directory of this source tree.
  */
 
-import { expect } from 'chai';
-import { describe, it } from 'mocha';
 import { swapi } from './swapi';
 
 function getDocument(query) {
@@ -28,27 +26,27 @@ function getDocument(query) {
   `;
 }
 
-describe('Film type', async () => {
+describe('Film type', () => {
   it('Gets an object by SWAPI ID', async () => {
     const query = '{ film(filmID: 1) { title } }';
     const result = await swapi(query);
-    expect(result.data.film.title).to.equal('A New Hope');
+    expect(result.data.film.title).toBe('A New Hope');
   });
 
   it('Gets a different object by SWAPI ID', async () => {
     const query = '{ film(filmID: 2) { title } }';
     const result = await swapi(query);
-    expect(result.data.film.title).to.equal('The Empire Strikes Back');
+    expect(result.data.film.title).toBe('The Empire Strikes Back');
   });
 
   it('Gets an object by global ID', async () => {
     const query = '{ film(filmID: 1) { id, title } }';
     const result = await swapi(query);
     const nextQuery = `{ film(id: "${result.data.film.id}") { id, title } }`;
     const nextResult = await swapi(nextQuery);
-    expect(result.data.film.title).to.equal('A New Hope');
-    expect(nextResult.data.film.title).to.equal('A New Hope');
-    expect(result.data.film.id).to.equal(nextResult.data.film.id);
+    expect(result.data.film.title).toBe('A New Hope');
+    expect(nextResult.data.film.title).toBe('A New Hope');
+    expect(result.data.film.id).toBe(nextResult.data.film.id);
   });
 
   it('Gets an object by global ID with node', async () => {
@@ -63,9 +61,9 @@ describe('Film type', async () => {
       }
     }`;
     const nextResult = await swapi(nextQuery);
-    expect(result.data.film.title).to.equal('A New Hope');
-    expect(nextResult.data.node.title).to.equal('A New Hope');
-    expect(result.data.film.id).to.equal(nextResult.data.node.id);
+    expect(result.data.film.title).toBe('A New Hope');
+    expect(nextResult.data.node.title).toBe('A New Hope');
+    expect(result.data.film.id).toBe(nextResult.data.node.id);
   });
 
   it('Gets all properties', async () => {
@@ -91,23 +89,23 @@ describe('Film type', async () => {
       characterConnection: { edges: [{ node: { name: 'Luke Skywalker' } }] },
       planetConnection: { edges: [{ node: { name: 'Tatooine' } }] },
     };
-    expect(result.data.film).to.deep.equal(expected);
+    expect(result.data.film).toMatchObject(expected);
   });
 
   it('All objects query', async () => {
     const query = getDocument(
       '{ allFilms { edges { cursor, node { ...AllFilmProperties } } } }',
     );
     const result = await swapi(query);
-    expect(result.data.allFilms.edges.length).to.equal(6);
+    expect(result.data.allFilms.edges.length).toBe(6);
   });
 
   it('Pagination query', async () => {
     const query = `{
       allFilms(first: 2) { edges { cursor, node { title } } }
     }`;
     const result = await swapi(query);
-    expect(result.data.allFilms.edges.map(e => e.node.title)).to.deep.equal([
+    expect(result.data.allFilms.edges.map(e => e.node.title)).toMatchObject([
       'A New Hope',
       'The Empire Strikes Back',
     ]);
@@ -119,6 +117,6 @@ describe('Film type', async () => {
     const nextResult = await swapi(nextQuery);
     expect(
       nextResult.data.allFilms.edges.map(e => e.node.title),
-    ).to.deep.equal(['Return of the Jedi', 'The Phantom Menace']);
+    ).toMatchObject(['Return of the Jedi', 'The Phantom Menace']);
   });
 });

src/schema/__tests__/film.js src/schema/__tests__/film.spec.js

@@ -6,8 +6,6 @@
  * LICENSE-examples file in the root directory of this source tree.
  */
 
-import { expect } from 'chai';
-import { describe, it } from 'mocha';
 import { swapi } from './swapi';
 
 function getDocument(query) {
@@ -30,27 +28,27 @@ function getDocument(query) {
   `;
 }
 
-describe('Person type', async () => {
+describe('Person type', () => {
   it('Gets an object by SWAPI ID', async () => {
     const query = '{ person(personID: 1) { name } }';
     const result = await swapi(query);
-    expect(result.data.person.name).to.equal('Luke Skywalker');
+    expect(result.data.person.name).toBe('Luke Skywalker');
   });
 
   it('Gets a different object by SWAPI ID', async () => {
     const query = '{ person(personID: 2) { name } }';
     const result = await swapi(query);
-    expect(result.data.person.name).to.equal('C-3PO');
+    expect(result.data.person.name).toBe('C-3PO');
   });
 
   it('Gets an object by global ID', async () => {
     const query = '{ person(personID: 1) { id, name } }';
     const result = await swapi(query);
     const nextQuery = `{ person(id: "${result.data.person.id}") { id, name } }`;
     const nextResult = await swapi(nextQuery);
-    expect(result.data.person.name).to.equal('Luke Skywalker');
-    expect(nextResult.data.person.name).to.equal('Luke Skywalker');
-    expect(result.data.person.id).to.equal(nextResult.data.person.id);
+    expect(result.data.person.name).toBe('Luke Skywalker');
+    expect(nextResult.data.person.name).toBe('Luke Skywalker');
+    expect(result.data.person.id).toBe(nextResult.data.person.id);
   });
 
   it('Gets an object by global ID with node', async () => {
@@ -65,9 +63,9 @@ describe('Person type', async () => {
       }
     }`;
     const nextResult = await swapi(nextQuery);
-    expect(result.data.person.name).to.equal('Luke Skywalker');
-    expect(nextResult.data.node.name).to.equal('Luke Skywalker');
-    expect(result.data.person.id).to.equal(nextResult.data.node.id);
+    expect(result.data.person.name).toBe('Luke Skywalker');
+    expect(nextResult.data.node.name).toBe('Luke Skywalker');
+    expect(result.data.person.id).toBe(nextResult.data.node.id);
   });
 
   it('Gets all properties', async () => {
@@ -94,23 +92,23 @@ describe('Person type', async () => {
       starshipConnection: { edges: [{ node: { name: 'X-wing' } }] },
       vehicleConnection: { edges: [{ node: { name: 'Snowspeeder' } }] },
     };
-    expect(result.data.person).to.deep.equal(expected);
+    expect(result.data.person).toMatchObject(expected);
   });
 
   it('All objects query', async () => {
     const query = getDocument(
       '{ allPeople { edges { cursor, node { ...AllPersonProperties } } } }',
     );
     const result = await swapi(query);
-    expect(result.data.allPeople.edges.length).to.equal(82);
+    expect(result.data.allPeople.edges.length).toBe(82);
   });
 
   it('Pagination query', async () => {
     const query = `{
       allPeople(first: 2) { edges { cursor, node { name } } }
     }`;
     const result = await swapi(query);
-    expect(result.data.allPeople.edges.map(e => e.node.name)).to.deep.equal([
+    expect(result.data.allPeople.edges.map(e => e.node.name)).toMatchObject([
       'Luke Skywalker',
       'C-3PO',
     ]);
@@ -122,22 +120,22 @@ describe('Person type', async () => {
     const nextResult = await swapi(nextQuery);
     expect(
       nextResult.data.allPeople.edges.map(e => e.node.name),
-    ).to.deep.equal(['R2-D2', 'Darth Vader']);
+    ).toMatchObject(['R2-D2', 'Darth Vader']);
   });
 
   describe('Edge cases', () => {
     it('Returns null if no species is set', async () => {
       const query = '{ person(personID: 42) { name, species { name } } }';
       const result = await swapi(query);
-      expect(result.data.person.name).to.equal('Quarsh Panaka');
-      expect(result.data.person.species).to.equal(null);
+      expect(result.data.person.name).toBe('Quarsh Panaka');
+      expect(result.data.person.species).toBe(null);
     });
 
     it('Returns correctly if a species is set', async () => {
       const query = '{ person(personID: 67) { name, species { name } } }';
       const result = await swapi(query);
-      expect(result.data.person.name).to.equal('Dooku');
-      expect(result.data.person.species.name).to.equal('Human');
+      expect(result.data.person.name).toBe('Dooku');
+      expect(result.data.person.species.name).toBe('Human');
     });
   });
 });