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+/* 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/.
+ *
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ *
+ * This IDL file is related to the WebExtensions API object only used in
+ * unit tests.
+ *
+ * More info about generating webidl API bindings for WebExtensions API at:
+ *
+ * https://firefox-source-docs.mozilla.org/toolkit/components/extensions/webextensions/webidl_bindings.html
+ *
+ * A short summary of the special setup used by these WebIDL files (meant to aid
+ * webidl peers reviews and sign-offs) is available in the following section:
+ *
+ * https://firefox-source-docs.mozilla.org/toolkit/components/extensions/webextensions/webidl_bindings.html#review-process-on-changes-to-webidl-definitions
+ */
+
+// WebIDL definition for the "mockExtensionAPI" WebExtensions API,
+// only available in tests and locked behind an about:config preference
+// ("extensions.webidl-api.expose_mock_interface").
+[Exposed=(ServiceWorker), LegacyNoInterfaceObject]
+interface ExtensionMockAPI {
+  // Test API methods scenarios.
+
+  [Throws, WebExtensionStub]
+  any methodSyncWithReturn(any... args);
+
+  [Throws, WebExtensionStub="NoReturn"]
+  undefined methodNoReturn(any... args);
+
+  [Throws, WebExtensionStub="Async"]
+  any methodAsync(any arg0, optional Function cb);
+
+  [Throws, WebExtensionStub="AsyncAmbiguous"]
+  any methodAmbiguousArgsAsync(any... args);
+
+  [Throws, WebExtensionStub="ReturnsPort"]
+  ExtensionPort methodReturnsPort(DOMString testName);
+
+  // Test API properties.
+
+  [Replaceable]
+  readonly attribute any propertyAsErrorObject;
+
+  [Replaceable]
+  readonly attribute DOMString propertyAsString;
+
+  // Test API events.
+
+  [Replaceable, SameObject]
+  readonly attribute ExtensionEventManager onTestEvent;
+};