1 files changed, 31 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/test/shim.js b/devtools/client/debugger/src/test/shim.js
new file mode 100644
index 0000000000..d1ac2f549f
--- /dev/null
+++ b/devtools/client/debugger/src/test/shim.js
@@ -0,0 +1,31 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+const {
+  setMocksInGlobal,
+} = require("devtools/client/shared/test-helpers/shared-node-helpers");
+setMocksInGlobal();
+
+const { LocalizationHelper } = require("devtools/shared/l10n");
+global.L10N = new LocalizationHelper(
+  "devtools/client/locales/debugger.properties"
+);
+
+const { URL } = require("url");
+global.URL = URL;
+
+// JSDOM doesn't seem to have those functions that are used by codeMirror.
+// See https://github.com/jsdom/jsdom/issues/3002
+document.createRange = () => {
+  const range = new Range();
+
+  range.getBoundingClientRect = jest.fn();
+
+  range.getClientRects = jest.fn(() => ({
+    item: () => null,
+    length: 0,
+  }));
+
+  return range;
+};