1 files changed, 75 insertions, 0 deletions
diff --git a/devtools/client/inspector/test/browser_inspector_pane_state_restore.js b/devtools/client/inspector/test/browser_inspector_pane_state_restore.js
new file mode 100644
index 0000000000..8eb345e3de
--- /dev/null
+++ b/devtools/client/inspector/test/browser_inspector_pane_state_restore.js
@@ -0,0 +1,75 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that the previous inspector split box sizes are restored when reopening the
+// inspector.
+
+const EXPECTED_INITIAL_WIDTH = 101;
+const EXPECTED_INITIAL_HEIGHT = 102;
+const EXPECTED_INITIAL_SIDEBAR_WIDTH = 103;
+
+const EXPECTED_NEW_WIDTH = 150;
+const EXPECTED_NEW_HEIGHT = 100;
+const EXPECTED_NEW_SIDEBAR_WIDTH = 250;
+
+add_task(async function () {
+  // Simulate that the user has already stored their preferred split boxes widths.
+  await pushPref(
+    "devtools.toolsidebar-width.inspector",
+    EXPECTED_INITIAL_WIDTH
+  );
+  await pushPref(
+    "devtools.toolsidebar-height.inspector",
+    EXPECTED_INITIAL_HEIGHT
+  );
+  await pushPref(
+    "devtools.toolsidebar-width.inspector.splitsidebar",
+    EXPECTED_INITIAL_SIDEBAR_WIDTH
+  );
+
+  const { inspector } = await openInspectorForURL("about:blank");
+
+  info("Check the initial size of the inspector.");
+  const { width, height, splitSidebarWidth } = inspector.getSidebarSize();
+  is(width, EXPECTED_INITIAL_WIDTH, "Got correct initial width.");
+  is(height, EXPECTED_INITIAL_HEIGHT, "Got correct initial height.");
+  is(
+    splitSidebarWidth,
+    EXPECTED_INITIAL_SIDEBAR_WIDTH,
+    "Got correct initial split sidebar width."
+  );
+
+  info("Simulate updates to the dimensions of the various splitboxes.");
+  inspector.splitBox.setState({
+    width: EXPECTED_NEW_WIDTH,
+    height: EXPECTED_NEW_HEIGHT,
+  });
+  inspector.sidebarSplitBoxRef.current.setState({
+    width: EXPECTED_NEW_SIDEBAR_WIDTH,
+  });
+
+  await closeToolbox();
+
+  info(
+    "Check the stored sizes of the inspector in the preferences when the inspector " +
+      "is closed"
+  );
+  const storedWidth = Services.prefs.getIntPref(
+    "devtools.toolsidebar-width.inspector"
+  );
+  const storedHeight = Services.prefs.getIntPref(
+    "devtools.toolsidebar-height.inspector"
+  );
+  const storedSplitSidebarWidth = Services.prefs.getIntPref(
+    "devtools.toolsidebar-width.inspector.splitsidebar"
+  );
+  is(storedWidth, EXPECTED_NEW_WIDTH, "Got correct stored width.");
+  is(storedHeight, EXPECTED_NEW_HEIGHT, "Got correct stored height");
+  is(
+    storedSplitSidebarWidth,
+    EXPECTED_NEW_SIDEBAR_WIDTH,
+    "Got correct stored split sidebar width."
+  );
+});