1 files changed, 68 insertions, 0 deletions
diff --git a/devtools/client/framework/test/browser_tab_descriptor_fission.js b/devtools/client/framework/test/browser_tab_descriptor_fission.js
new file mode 100644
index 0000000000..bf15f01293
--- /dev/null
+++ b/devtools/client/framework/test/browser_tab_descriptor_fission.js
@@ -0,0 +1,68 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Check that tab descriptor survives after the page navigates and changes
+ * process.
+ */
+
+const EXAMPLE_COM_URI =
+  "https://example.com/document-builder.sjs?html=<div id=com>com";
+const EXAMPLE_ORG_URI =
+  "https://example.org/document-builder.sjs?html=<div id=org>org";
+
+add_task(async function () {
+  const tab = await addTab(EXAMPLE_COM_URI);
+  const toolbox = await gDevTools.showToolboxForTab(tab);
+  const target = toolbox.target;
+  const client = toolbox.commands.client;
+
+  info("Retrieve the initial list of tab descriptors");
+  const tabDescriptors = await client.mainRoot.listTabs();
+  const tabDescriptor = tabDescriptors.find(
+    d => decodeURIComponent(d.url) === EXAMPLE_COM_URI
+  );
+  ok(tabDescriptor, "Should have a descriptor actor for the tab");
+
+  info("Retrieve the target corresponding to the TabDescriptor");
+  const comTabTarget = await tabDescriptor.getTarget();
+  is(
+    target,
+    comTabTarget,
+    "The toolbox target is also the target associated with the tab descriptor"
+  );
+
+  await navigateTo(EXAMPLE_ORG_URI);
+
+  info("Call list tabs again to update the tab descriptor forms");
+  await client.mainRoot.listTabs();
+
+  is(
+    decodeURIComponent(tabDescriptor.url),
+    EXAMPLE_ORG_URI,
+    "The existing descriptor now points to the new URI"
+  );
+
+  const newTarget = toolbox.target;
+
+  is(
+    comTabTarget.actorID,
+    null,
+    "With Fission or server side target switching, example.com target front is destroyed"
+  );
+  Assert.notEqual(
+    comTabTarget,
+    newTarget,
+    "With Fission or server side target switching, a new target was created for example.org"
+  );
+
+  const onDescriptorDestroyed = tabDescriptor.once("descriptor-destroyed");
+
+  await removeTab(tab);
+
+  info("Wait for descriptor destroyed event");
+  await onDescriptorDestroyed;
+  ok(tabDescriptor.isDestroyed(), "the descriptor front is really destroyed");
+});