1 files changed, 44 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_sizemodeBeforeMinimized.js b/browser/components/sessionstore/test/browser_sizemodeBeforeMinimized.js
new file mode 100644
index 0000000000..a832e71bcf
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_sizemodeBeforeMinimized.js
@@ -0,0 +1,44 @@
+add_task(async function test() {
+  // Test for bugfix 384278. Confirms that sizemodeBeforeMinimized is set properly when window state is saved.
+  let win = await BrowserTestUtils.openNewBrowserWindow();
+
+  async function changeSizeMode(mode) {
+    let promise = BrowserTestUtils.waitForEvent(win, "sizemodechange");
+    win[mode]();
+    await promise;
+  }
+
+  function checkCurrentState(sizemodeBeforeMinimized) {
+    let state = ss.getWindowState(win);
+    let winState = state.windows[0];
+    is(
+      winState.sizemodeBeforeMinimized,
+      sizemodeBeforeMinimized,
+      "sizemodeBeforeMinimized should match"
+    );
+  }
+
+  // Note: Uses ss.getWindowState(win); as a more time efficient alternative to forceSaveState(); (causing timeouts).
+  // Simulates FF restart.
+
+  if (win.windowState != win.STATE_NORMAL) {
+    await changeSizeMode("restore");
+  }
+  ss.getWindowState(win);
+  await changeSizeMode("minimize");
+  checkCurrentState("normal");
+
+  // Need to create new window or test will timeout on linux.
+  await BrowserTestUtils.closeWindow(win);
+  win = await BrowserTestUtils.openNewBrowserWindow();
+
+  if (win.windowState != win.STATE_MAXIMIZED) {
+    await changeSizeMode("maximize");
+  }
+  ss.getWindowState(win);
+  await changeSizeMode("minimize");
+  checkCurrentState("maximized");
+
+  // Clean up.
+  await BrowserTestUtils.closeWindow(win);
+});