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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Check that when the input overflows, inserting a tab doesn't not impact the
// scroll position. See Bug 1578283.
"use strict";
const TEST_URI = "data:text/html,<!DOCTYPE html><meta charset=utf8>";
add_task(async function () {
const hud = await openNewTabAndConsole(TEST_URI);
const cmScroller = hud.ui.outputNode.querySelector(".CodeMirror-scroll");
info("Fill in the input with a hundred lines to make it overflow");
await setInputValue(hud, "x;\n".repeat(100));
ok(hasVerticalOverflow(cmScroller), "input overflows");
info("Put the cursor at the very beginning");
hud.jsterm.editor.setCursor({
line: 0,
ch: 0,
});
is(cmScroller.scrollTop, 0, "input is scrolled all the way up");
info("Move the cursor one line down and hit Tab");
EventUtils.synthesizeKey("KEY_ArrowDown");
EventUtils.synthesizeKey("KEY_Tab");
checkInputValueAndCursorPosition(
hud,
`x;\n\t|x;\n${"x;\n".repeat(98)}`,
"a tab char was added at the start of the second line after hitting Tab"
);
is(
cmScroller.scrollTop,
0,
"Scroll position wasn't affected by new char addition"
);
});
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