1 files changed, 54 insertions, 0 deletions
diff --git a/devtools/client/shared/redux/middleware/xpcshell/test_middleware-task-03.js b/devtools/client/shared/redux/middleware/xpcshell/test_middleware-task-03.js
new file mode 100644
index 0000000000..2c3b69291c
--- /dev/null
+++ b/devtools/client/shared/redux/middleware/xpcshell/test_middleware-task-03.js
@@ -0,0 +1,54 @@
+/* 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/. */
+
+"use strict";
+
+const {
+  createStore,
+  applyMiddleware,
+} = require("devtools/client/shared/vendor/redux");
+const {
+  task,
+  ERROR_TYPE,
+} = require("devtools/client/shared/redux/middleware/task");
+
+/**
+ * Tests that the middleware handles errors thrown in tasks, and rejected promises.
+ */
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(async function() {
+  const store = applyMiddleware(task)(createStore)(reducer);
+
+  store.dispatch(generatorError());
+  await waitUntilState(store, () => store.getState().length === 1);
+  equal(
+    store.getState()[0].type,
+    ERROR_TYPE,
+    "generator errors dispatch ERROR_TYPE actions"
+  );
+  equal(
+    store.getState()[0].error,
+    "task-middleware-error-generator",
+    "generator errors dispatch ERROR_TYPE actions with error"
+  );
+});
+
+function generatorError() {
+  return function*({ dispatch, getState }) {
+    const error = "task-middleware-error-generator";
+    throw error;
+  };
+}
+
+function reducer(state = [], action) {
+  info("Action called: " + action.type);
+  if (action.type === ERROR_TYPE) {
+    state.push(action);
+  }
+  return [...state];
+}