Fix mocha tests in TypeScript

`mock-require` does not work with TypeScript, as the compiled JS expects a sub-object: `import { config } from Config` compiles to `const config_1 = require("./config")`, but the config object is now in `config_1.config`, *not* in `config_1` directly.

Therefore `mock-require` was replaced with `ts-mock-imports`, which also simplifies the code a bit.

Signed-off-by: David Mehren <dmehren1@gmail.com>

package.json

@@ -215,11 +215,12 @@
     "less-loader": "^5.0.0",
     "mini-css-extract-plugin": "^0.8.0",
     "mocha": "^5.2.0",
-    "mock-require": "^3.0.3",
     "optimize-css-assets-webpack-plugin": "^5.0.3",
     "script-loader": "^0.7.2",
+    "sinon": "^9.0.2",
     "string-loader": "^0.0.1",
     "style-loader": "^1.0.0",
+    "ts-mock-imports": "^1.3.0",
     "ts-node": "^8.8.2",
     "typescript": "^3.7.2",
     "url-loader": "^2.3.0",

src/test/csp.ts

@@ -5,7 +5,8 @@ import assert from 'assert'
 import crypto from 'crypto'
 import fs from 'fs'
 import path from 'path'
-import mock from 'mock-require'
+import * as configModule from '../lib/config';
+import { ImportMock } from 'ts-mock-imports';
 
 describe('Content security policies', function () {
   let defaultConfig, csp
@@ -31,22 +32,11 @@ describe('Content security policies', function () {
     }
   })
 
-  afterEach(function () {
-    mock.stop('../lib/config')
-    csp = mock.reRequire('../lib/csp')
-  })
-
-  after(function () {
-    mock.stopAll()
-    csp = mock.reRequire('../lib/csp')
-  })
-
   // beginnging Tests
   it('Disable CDN', function () {
     const testconfig = defaultConfig
     testconfig.useCDN = false
-    mock('../lib/config', testconfig)
-    csp = mock.reRequire('../lib/csp')
+    ImportMock.mockOther(configModule, 'config', testconfig);
 
     assert(!csp.computeDirectives().scriptSrc.includes('https://cdnjs.cloudflare.com'))
     assert(!csp.computeDirectives().scriptSrc.includes('https://cdn.mathjax.org'))
@@ -59,8 +49,7 @@ describe('Content security policies', function () {
   it('Disable Google Analytics', function () {
     const testconfig = defaultConfig
     testconfig.csp.addGoogleAnalytics = false
-    mock('../lib/config', testconfig)
-    csp = mock.reRequire('../lib/csp')
+    ImportMock.mockOther(configModule, 'config', testconfig);
 
     assert(!csp.computeDirectives().scriptSrc.includes('https://www.google-analytics.com'))
   })
@@ -68,8 +57,7 @@ describe('Content security policies', function () {
   it('Disable Disqus', function () {
     const testconfig = defaultConfig
     testconfig.csp.addDisqus = false
-    mock('../lib/config', testconfig)
-    csp = mock.reRequire('../lib/csp')
+    ImportMock.mockOther(configModule, 'config', testconfig);
 
     assert(!csp.computeDirectives().scriptSrc.includes('https://disqus.com'))
     assert(!csp.computeDirectives().scriptSrc.includes('https://*.disqus.com'))
@@ -81,16 +69,14 @@ describe('Content security policies', function () {
   it('Set ReportURI', function () {
     const testconfig = defaultConfig
     testconfig.csp.reportURI = 'https://example.com/reportURI'
-    mock('../lib/config', testconfig)
-    csp = mock.reRequire('../lib/csp')
+    ImportMock.mockOther(configModule, 'config', testconfig);
 
     assert.strictEqual(csp.computeDirectives().reportUri, 'https://example.com/reportURI')
   })
 
   it('Set own directives', function () {
     const testconfig = defaultConfig
-    mock('../lib/config', defaultConfig)
-    csp = mock.reRequire('../lib/csp')
+    ImportMock.mockOther(configModule, 'config', testconfig);
     const unextendedCSP = csp.computeDirectives()
     testconfig.csp.directives = {
       defaultSrc: ['https://default.example.com'],
@@ -103,8 +89,7 @@ describe('Content security policies', function () {
       childSrc: ['https://child.example.com'],
       connectSrc: ['https://connect.example.com']
     }
-    mock('../lib/config', testconfig)
-    csp = mock.reRequire('../lib/csp')
+    ImportMock.mockOther(configModule, 'config', testconfig);
 
     const variations = ['default', 'script', 'img', 'style', 'font', 'object', 'media', 'child', 'connect']
 
@@ -118,7 +103,7 @@ describe('Content security policies', function () {
    */
   it('Unchanged hash for reveal.js speaker notes plugin', function () {
     const hash = crypto.createHash('sha1')
-    hash.update(fs.readFileSync(path.resolve(__dirname, '../node_modules/reveal.js/plugin/notes/notes.html'), 'utf8'), 'utf8')
+    hash.update(fs.readFileSync(path.join(process.cwd(), '/node_modules/reveal.js/plugin/notes/notes.html'), 'utf8'), 'utf8')
     assert.strictEqual(hash.digest('hex'), 'd5d872ae49b5db27f638b152e6e528837204d380')
   })
 })

src/test/letter-avatars.ts

@@ -2,11 +2,13 @@
 
 'use strict'
 
+import { ImportMock } from 'ts-mock-imports'
+import * as configModule from '../lib/config'
+
 const assert = require('assert')
-const mock = require('mock-require')
+const avatars = require('../lib/letter-avatars')
 
 describe('generateAvatarURL() gravatar enabled', function () {
-  let avatars
   beforeEach(function () {
     // Reset config to make sure we don't influence other tests
     let testconfig = {
@@ -14,8 +16,7 @@ describe('generateAvatarURL() gravatar enabled', function () {
       serverURL: 'http://localhost:3000',
       port: 3000
     }
-    mock('../lib/config', testconfig)
-    avatars = mock.reRequire('../lib/letter-avatars')
+    ImportMock.mockOther(configModule, 'config', testconfig);
   })
 
   it('should return correct urls', function () {
@@ -29,7 +30,6 @@ describe('generateAvatarURL() gravatar enabled', function () {
 })
 
 describe('generateAvatarURL() gravatar disabled', function () {
-  let avatars
   beforeEach(function () {
     // Reset config to make sure we don't influence other tests
     let testconfig = {
@@ -37,8 +37,7 @@ describe('generateAvatarURL() gravatar disabled', function () {
       serverURL: 'http://localhost:3000',
       port: 3000
     }
-    mock('../lib/config', testconfig)
-    avatars = mock.reRequire('../lib/letter-avatars')
+    ImportMock.mockOther(configModule, 'config', testconfig);
   })
 
   it('should return correct urls', function () {