1 files changed, 74 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_jsterm_editor_code_folding.js b/devtools/client/webconsole/test/browser/browser_jsterm_editor_code_folding.js
new file mode 100644
index 0000000000..e902a7e761
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+++ b/devtools/client/webconsole/test/browser/browser_jsterm_editor_code_folding.js
@@ -0,0 +1,74 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests for code folding appears in editor mode, does not appear in inline mode,
+// and that folded code does not remain folded when switched to inline mode.
+// See https://bugzilla.mozilla.org/show_bug.cgi?id=1581641
+
+"use strict";
+
+const TEST_URI =
+  "data:text/html;charset=utf-8,<!DOCTYPE html>Test JsTerm editor code folding";
+
+add_task(async function () {
+  await pushPref("devtools.webconsole.input.editor", true);
+
+  const hud = await openNewTabAndConsole(TEST_URI);
+
+  info("Check that code folding gutter & arrow are rendered in editor mode");
+
+  const multilineExpression = `function() {
+    // Silence is golden
+  }`;
+  await setInputValue(hud, multilineExpression);
+
+  ok(
+    await waitFor(() => getFoldArrowOpenElement(hud)),
+    "code folding gutter was rendered in editor mode"
+  );
+
+  const foldingArrow = getFoldArrowOpenElement(hud);
+  ok(foldingArrow, "code folding arrow was rendered in code folding gutter");
+  is(getCodeLines(hud).length, 3, "There are 3 lines displayed");
+
+  info("Check that code folds when gutter marker clicked");
+  EventUtils.synthesizeMouseAtCenter(
+    foldingArrow,
+    {},
+    foldingArrow.ownerDocument.defaultView
+  );
+  await waitFor(() => getCodeLines(hud).length === 1);
+  ok(true, "The code was folded, there's only one line displayed now");
+
+  info("Check that folded code is expanded when rendered inline");
+
+  await toggleLayout(hud);
+
+  is(
+    getCodeLines(hud).length,
+    3,
+    "folded code is expended when rendered in inline"
+  );
+
+  info(
+    "Check that code folding gutter is hidden when we switch to inline mode"
+  );
+  ok(
+    !getFoldGutterElement(hud),
+    "code folding gutter is hidden when we switsch to inline mode"
+  );
+});
+
+function getCodeLines(hud) {
+  return hud.ui.outputNode.querySelectorAll(
+    ".CodeMirror-code pre.CodeMirror-line"
+  );
+}
+
+function getFoldGutterElement(hud) {
+  return hud.ui.outputNode.querySelector(".CodeMirror-foldgutter");
+}
+
+function getFoldArrowOpenElement(hud) {
+  return hud.ui.outputNode.querySelector(".CodeMirror-foldgutter-open");
+}