1 files changed, 39 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_1446343-windowsize.js b/browser/components/sessionstore/test/browser_1446343-windowsize.js
new file mode 100644
index 0000000000..97f664a460
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_1446343-windowsize.js
@@ -0,0 +1,39 @@
+add_task(async function test() {
+  const win = await BrowserTestUtils.openNewBrowserWindow();
+
+  async function changeSizeMode(mode) {
+    let promise = BrowserTestUtils.waitForEvent(win, "sizemodechange");
+    win[mode]();
+    await promise;
+  }
+  if (win.windowState != win.STATE_NORMAL) {
+    await changeSizeMode("restore");
+  }
+
+  const { outerWidth, outerHeight, screenX, screenY } = win;
+  function checkCurrentState(sizemode) {
+    let state = ss.getWindowState(win);
+    let winState = state.windows[0];
+    let msgSuffix = ` should match on ${sizemode} mode`;
+    is(winState.width, outerWidth, "width" + msgSuffix);
+    is(winState.height, outerHeight, "height" + msgSuffix);
+    // The position attributes seem to be affected on macOS when the
+    // window gets maximized, so skip checking them for now.
+    if (AppConstants.platform != "macosx" || sizemode == "normal") {
+      is(winState.screenX, screenX, "screenX" + msgSuffix);
+      is(winState.screenY, screenY, "screenY" + msgSuffix);
+    }
+    is(winState.sizemode, sizemode, "sizemode should match");
+  }
+
+  checkCurrentState("normal");
+
+  await changeSizeMode("maximize");
+  checkCurrentState("maximized");
+
+  await changeSizeMode("minimize");
+  checkCurrentState("minimized");
+
+  // Clean up.
+  await BrowserTestUtils.closeWindow(win);
+});