Fix lint and tests

js/.eslintrc.js

@@ -12,6 +12,7 @@ module.exports = {
     browser: true,
     es6: true,
     commonjs: true,
+    jest: true,
   },
   extends: [
     "eslint:recommended",

js/jest.config.js

@@ -1,12 +1,27 @@
 /******************************************************************************
  *
- * Copyright (c) 2019, the jupyter-fs authors.
+ * Copyright (c) 2019, the nbcelltests authors.
  *
- * This file is part of the jupyter-fs library, distributed under the terms of
+ * This file is part of the nbcelltests library, distributed under the terms of
  * the Apache License 2.0.  The full license can be found in the LICENSE file.
  *
  */
-const esModules = ["@jupyter", "@jupyterlab", "@jupyter-widgets", "@lumino", "lib0", "nanoid", "y-protocols", "internmap", "delaunator", "robust-predicates", "lodash-es", "tree-finder"].join("|");
+const esModules = [
+  "@jupyter",
+  "@jupyterlab",
+  "@jupyter-widgets",
+  "@lumino",
+  "@microsoft",
+  "delaunator",
+  "exenv-es6",
+  "internmap",
+  "lib0",
+  "lodash-es",
+  "nanoid",
+  "robust-predicates",
+  "vscode-ws-jsonrpc",
+  "y-protocols",
+].join("|");
 
 module.exports = {
   preset: "ts-jest/presets/js-with-babel",

js/tests/setup.js

@@ -9,3 +9,17 @@
 Object.defineProperty(window, "DragEvent", {
   value: class DragEvent {},
 });
+
+Object.defineProperty(window, "matchMedia", {
+  writable: true,
+  value: jest.fn().mockImplementation(query => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: jest.fn(), // Deprecated
+    removeListener: jest.fn(), // Deprecated
+    addEventListener: jest.fn(),
+    removeEventListener: jest.fn(),
+    dispatchEvent: jest.fn(),
+  })),
+});