1 files changed, 39 insertions, 0 deletions
diff --git a/devtools/client/framework/test/browser_toolbox_getpanelwhenready.js b/devtools/client/framework/test/browser_toolbox_getpanelwhenready.js
new file mode 100644
index 0000000000..85436c2925
--- /dev/null
+++ b/devtools/client/framework/test/browser_toolbox_getpanelwhenready.js
@@ -0,0 +1,39 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that getPanelWhenReady returns the correct panel in promise
+// resolutions regardless of whether it has opened first.
+
+var toolbox = null;
+
+const URL = "data:text/html;charset=utf8,test for getPanelWhenReady";
+
+add_task(async function () {
+  const tab = await addTab(URL);
+  toolbox = await gDevTools.showToolboxForTab(tab);
+
+  const debuggerPanelPromise = toolbox.getPanelWhenReady("jsdebugger");
+  await toolbox.selectTool("jsdebugger");
+  const debuggerPanel = await debuggerPanelPromise;
+
+  is(
+    debuggerPanel,
+    toolbox.getPanel("jsdebugger"),
+    "The debugger panel from getPanelWhenReady before loading is the actual panel"
+  );
+
+  const debuggerPanel2 = await toolbox.getPanelWhenReady("jsdebugger");
+  is(
+    debuggerPanel2,
+    toolbox.getPanel("jsdebugger"),
+    "The debugger panel from getPanelWhenReady after loading is the actual panel"
+  );
+
+  await cleanup();
+});
+
+async function cleanup() {
+  await toolbox.destroy();
+  gBrowser.removeCurrentTab();
+  toolbox = null;
+}