1 files changed, 52 insertions, 0 deletions
diff --git a/devtools/server/tests/unit/test_promises_actor_attach.js b/devtools/server/tests/unit/test_promises_actor_attach.js
new file mode 100644
index 000000000..17c2a1f41
--- /dev/null
+++ b/devtools/server/tests/unit/test_promises_actor_attach.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we can attach and detach to the PromisesActor under the correct
+ * states.
+ */
+
+const { PromisesFront } = require("devtools/shared/fronts/promises");
+
+add_task(function* () {
+  let client = yield startTestDebuggerServer("promises-actor-test");
+  let chromeActors = yield getChromeActors(client);
+
+  // We have to attach the chrome TabActor before playing with the PromiseActor
+  yield attachTab(client, chromeActors);
+  yield testAttach(client, chromeActors);
+
+  let response = yield listTabs(client);
+  let targetTab = findTab(response.tabs, "promises-actor-test");
+  ok(targetTab, "Found our target tab.");
+
+  let [ tabResponse ] = yield attachTab(client, targetTab);
+
+  yield testAttach(client, tabResponse);
+
+  yield close(client);
+});
+
+function* testAttach(client, parent) {
+  let promises = PromisesFront(client, parent);
+
+  try {
+    yield promises.detach();
+    ok(false, "Should not be able to detach when in a detached state.");
+  } catch (e) {
+    ok(true, "Expected detach to fail when already in a detached state.");
+  }
+
+  yield promises.attach();
+  ok(true, "Expected attach to succeed.");
+
+  try {
+    yield promises.attach();
+    ok(false, "Should not be able to attach when in an attached state.");
+  } catch (e) {
+    ok(true, "Expected attach to fail when already in an attached state.");
+  }
+
+  yield promises.detach();
+  ok(true, "Expected detach to succeed.");
+}