1 files changed, 60 insertions, 0 deletions
diff --git a/remote/marionette/permissions.sys.mjs b/remote/marionette/permissions.sys.mjs
new file mode 100644
index 0000000000..43fac98422
--- /dev/null
+++ b/remote/marionette/permissions.sys.mjs
@@ -0,0 +1,60 @@
+/* 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 lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  error: "chrome://remote/content/shared/webdriver/Errors.sys.mjs",
+  MarionettePrefs: "chrome://remote/content/marionette/prefs.sys.mjs",
+});
+
+/** @namespace */
+export const permissions = {};
+
+/**
+ * Set a permission's state.
+ * Note: Currently just a shim to support testdriver's set_permission.
+ *
+ * @param {Object} descriptor
+ *     Descriptor with the `name` property.
+ * @param {string} state
+ *     State of the permission. It can be `granted`, `denied` or `prompt`.
+ * @param {boolean} oneRealm
+ *     Currently ignored
+ *
+ * @throws {UnsupportedOperationError}
+ *     If `marionette.setpermission.enabled` is not set or
+ *     an unsupported permission is used.
+ */
+permissions.set = function(descriptor, state, oneRealm) {
+  if (!lazy.MarionettePrefs.setPermissionEnabled) {
+    throw new lazy.error.UnsupportedOperationError(
+      "'Set Permission' is not available"
+    );
+  }
+
+  const { name } = descriptor;
+  if (!["clipboard-write", "clipboard-read"].includes(name)) {
+    throw new lazy.error.UnsupportedOperationError(
+      `'Set Permission' doesn't support '${name}'`
+    );
+  }
+
+  if (state === "prompt") {
+    throw new lazy.error.UnsupportedOperationError(
+      "'Set Permission' doesn't support prompt"
+    );
+  }
+
+  // This is not a real implementation of the permissions API.
+  // Instead the purpose of this implementation is to have web-platform-tests
+  // that use `set_permission('clipboard-write|read')` not fail.
+  // We enable dom.events.testing.asyncClipboard for the whole test suite anyway,
+  // so no extra permission is necessary.
+  if (!Services.prefs.getBoolPref("dom.events.testing.asyncClipboard", false)) {
+    throw new lazy.error.UnsupportedOperationError(
+      "'Set Permission' expected dom.events.testing.asyncClipboard to be set"
+    );
+  }
+};