1 files changed, 43 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_printpreview.js b/browser/base/content/test/general/browser_printpreview.js
new file mode 100644
index 0000000000..945e2bbd3a
--- /dev/null
+++ b/browser/base/content/test/general/browser_printpreview.js
@@ -0,0 +1,43 @@
+let ourTab;
+
+async function test() {
+  waitForExplicitFinish();
+
+  BrowserTestUtils.openNewForegroundTab(gBrowser, "about:home", true).then(
+    function (tab) {
+      ourTab = tab;
+      ok(
+        !document.querySelector(".printPreviewBrowser"),
+        "Should NOT be in print preview mode at starting this tests"
+      );
+      testClosePrintPreviewWithEscKey();
+    }
+  );
+}
+
+function tidyUp() {
+  BrowserTestUtils.removeTab(ourTab);
+  finish();
+}
+
+async function testClosePrintPreviewWithEscKey() {
+  await openPrintPreview();
+  EventUtils.synthesizeKey("KEY_Escape");
+  await checkPrintPreviewClosed();
+  ok(true, "print preview mode should be finished by Esc key press");
+  tidyUp();
+}
+
+async function openPrintPreview() {
+  document.getElementById("cmd_print").doCommand();
+  await BrowserTestUtils.waitForCondition(() => {
+    let preview = document.querySelector(".printPreviewBrowser");
+    return preview && BrowserTestUtils.is_visible(preview);
+  });
+}
+
+async function checkPrintPreviewClosed() {
+  await BrowserTestUtils.waitForCondition(
+    () => !document.querySelector(".printPreviewBrowser")
+  );
+}