Fix jest configuration

Author: Frederic Collonval

jest.config.js

@@ -1,11 +1,12 @@
 module.exports = {
   automock: false,
   moduleNameMapper: {
-    '\\.(css|less|sass|scss)$': 'identity-obj-proxy'
+    '\\.(css|less|sass|scss)$': 'identity-obj-proxy',
+    '\\.(svg)$': '<rootDir>/testutils/jest-file-mock.js'
   },
   preset: 'ts-jest/presets/js-with-babel',
   moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
-  setupFiles: ['./setupJest.js'],
+  setupFiles: ['<rootDir>/testutils/jest-setup-files.js'],
   testPathIgnorePatterns: ['/dev_mode/', '/lib/', '/node_modules/'],
   testRegex: '/tests/test-.*/.*.spec.ts[x]?$',
   transformIgnorePatterns: ['/node_modules/(?!(@jupyterlab/.*)/)'],

package.json

@@ -52,7 +52,7 @@
     "@jupyterlab/application": "^1.1.0",
     "@jupyterlab/apputils": "^1.1.0",
     "@jupyterlab/console": "^1.1.0",
-    "@jupyterlab/coreutils": "^3.0.0",
+    "@jupyterlab/coreutils": "^3.1.0",
     "@jupyterlab/filebrowser": "^1.1.0",
     "@jupyterlab/mainmenu": "^1.1.0",
     "@jupyterlab/services": "^4.1.0",

testutils/jest-file-mock.js

@@ -0,0 +1 @@
+module.exports = 'test-file-stub';