fix(lanes,git): harden the lane git surface and fix client races in the Changes panel

Server (git-diff.js, git-ops.js, worktree.js, routes/lanes.js):
- Every lane git call runs with GIT_LITERAL_PATHSPECS=1 and -z porcelain, so a
  file name is a file name, never a glob, and odd names parse correctly.
- A lane that is a subdirectory of its repo sees and acts on ONLY its own
  paths (reads, stage/unstage/discard/commit, and gitFacts.files).
- Any file named settings.local.json (the lane's router API key) is refused as
  403 ESECRET on disk (symlinks resolved) and at every committed rev.
- commit refuses with 400 ESTAGEDOUTSIDE while anything outside the lane is
  staged (checked with --no-renames, so a move into the lane is caught).
- push resolves its remote (upstream → only remote → origin), else 400
  ENOREMOTE; unstaging a rename unstages both halves.
- Git writes serialize on the repo's git dir, not the lane id, so two lanes on
  one index cannot collide on index.lock.
- git refusing an action (a numeric exit status) answers 409 EGIT with git's
  stderr instead of a 500 carrying a numeric code; one shared parseNumstat.

Client:
- Changes panel: no stale answer from a previous lane or an older quick-open
  query repaints the panel; discard disarms on lane switch; Enter on a file
  path opens it instead of folding; bounded tree expand-all.
- Large diffs (> 500 rows) render only the visible rows, with stable width
  and in-sync split columns; mirrored split scroll is clamped.
- Git bar: no "in sync" without counts, a clear no-remote message, branch list
  re-read after a switch, and no previous-lane facts after a lane switch.
- Tooltips no longer flicker or close on unrelated scrolls.
This commit is contained in:
2026-09-24 09:54:51 +07:00
parent 6153d50fa8
commit 7bc4594b94
24 changed files with 2832 additions and 342 deletions
@@ -245,10 +245,11 @@ describe("AddLaneModal — picking an existing branch (issue #34)", () => {
await user.type(repoField, "/Users/tester/projects/repo");
await screen.findByLabelText("Branch to fork from");
await user.type(screen.getByLabelText("Title"), "Auto named");
// The placeholder previews the name the server will pick.
// No `feat/…` guess: the prefix is the server's LANE_BRANCH_PREFIX, which
// the form cannot see, so the placeholder only says the field is optional.
expect(screen.getByLabelText("New branch name")).toHaveAttribute(
"placeholder",
"feat/auto-named"
"Automatic — named from the title"
);
await user.click(screen.getByRole("button", { name: "Add lane" }));
@@ -237,6 +237,17 @@ describe("LaneCard git block", () => {
expect(screen.queryByText(/stale\/recorded/)).toBeNull();
});
it("drops the previous lane's facts the moment the lane changes", async () => {
vi.mocked(api.lanes.git).mockResolvedValueOnce(facts);
const { rerender } = render(<LaneCard lane={makeLane()} onAction={vi.fn()} />);
await screen.findByText(/feat\/rename-metric/);
// The next lane's read never lands: nothing of lane 1's git may linger.
vi.mocked(api.lanes.git).mockReturnValueOnce(new Promise(() => {}));
rerender(<LaneCard lane={makeLane({ id: 2, branch: "lane/other" })} onAction={vi.fn()} />);
expect(screen.queryByText(/feat\/rename-metric/)).toBeNull();
});
it("names the files behind the counts on hover, with each one's line delta", async () => {
vi.mocked(api.lanes.git).mockResolvedValueOnce(facts);
render(<LaneCard lane={makeLane()} onAction={vi.fn()} />);
@@ -11,7 +11,7 @@
*/
import { describe, it, expect, vi, beforeEach } from "vitest";
import { render, screen, waitFor } from "@testing-library/react";
import { render, screen, waitFor, act } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { LaneChangesPanel } from "../LaneChangesPanel";
import { api } from "../../../lib/api";
@@ -94,12 +94,14 @@ beforeEach(() => {
},
],
});
vi.mocked(api.lanes.gitLs).mockResolvedValue({
available: true,
paths: ["src/main.ts"],
truncated: false,
total: 1,
});
vi.mocked(api.lanes.gitLs)
.mockReset()
.mockResolvedValue({
available: true,
paths: ["src/main.ts"],
truncated: false,
total: 1,
});
vi.mocked(api.lanes.gitTree).mockResolvedValue({
available: true,
path: "",
@@ -229,6 +231,76 @@ describe("LaneChangesPanel", () => {
});
});
it("disarms a pending discard when the lane changes, so one click cannot discard in another lane", async () => {
const user = userEvent.setup();
const { rerender } = render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
const [discard] = screen.getAllByRole("button", { name: "Discard this file's changes" });
await user.click(discard!);
// Lane 8 has a file at the SAME path.
rerender(<LaneChangesPanel laneId={8} />);
await waitFor(() => expect(api.lanes.changes).toHaveBeenCalledWith(8, expect.anything()));
expect(
screen.queryByRole("button", { name: "Click again to discard — this cannot be undone" })
).toBeNull();
const [again] = await screen.findAllByRole("button", { name: "Discard this file's changes" });
await user.click(again!);
expect(api.lanes.gitAction).not.toHaveBeenCalled();
});
it("disarms a pending discard once that path leaves the file list", async () => {
const user = userEvent.setup();
render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
const [discard] = screen.getAllByRole("button", { name: "Discard this file's changes" });
await user.click(discard!);
// The file was committed/reverted elsewhere; a later reappearance must not be pre-armed.
const base = changes();
const rest = base.available ? base.files.slice(1) : [];
vi.mocked(api.lanes.changes).mockResolvedValueOnce(changes({ files: rest }));
vi.mocked(api.lanes.changes).mockResolvedValue(changes());
// A plain refresh (the poll's twin), not a git action — an action already disarms.
await user.click(screen.getByRole("button", { name: "Refresh" }));
await waitFor(() => expect(screen.queryByText("server/lib/git-ops.js")).toBeNull());
await user.click(screen.getByRole("button", { name: "Refresh" }));
await screen.findByText("server/lib/git-ops.js");
expect(
screen.queryByRole("button", { name: "Click again to discard — this cannot be undone" })
).toBeNull();
});
it("ignores a late response for the lane it has already left", async () => {
let resolveOld: (v: LaneChanges) => void = () => {};
vi.mocked(api.lanes.changes).mockImplementation((id) =>
id === 7
? new Promise<LaneChanges>((r) => (resolveOld = r))
: Promise.resolve(
changes({
files: [
{
path: "lane8.txt",
status: "??",
untracked: true,
added: 1,
deleted: 0,
binary: false,
},
],
})
)
);
const { rerender } = render(<LaneChangesPanel laneId={7} />);
rerender(<LaneChangesPanel laneId={8} />);
expect(await screen.findByText("lane8.txt")).toBeInTheDocument();
resolveOld(changes());
await new Promise((r) => setTimeout(r, 20));
expect(screen.getByText("lane8.txt")).toBeInTheDocument();
expect(screen.queryByText("server/lib/git-ops.js")).toBeNull();
});
it("opens a commit from history as a commit-range review", async () => {
const user = userEvent.setup();
render(<LaneChangesPanel laneId={7} />);
@@ -411,6 +483,16 @@ describe("LaneChangesPanel", () => {
});
});
it("drops a half-typed commit message on a lane switch", async () => {
const user = userEvent.setup();
const { rerender } = render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-commit");
await user.type(screen.getByLabelText("Commit message"), "fix: meant for lane 7");
rerender(<LaneChangesPanel laneId={8} />);
await screen.findByTestId("lane-changes-commit");
expect(screen.getByLabelText("Commit message")).toHaveValue("");
});
it("hides the commit box when nothing is staged", async () => {
vi.mocked(api.lanes.changes).mockResolvedValue(
changes({
@@ -515,6 +597,73 @@ describe("LaneChangesPanel", () => {
);
});
it("opens, not folds, when Enter is pressed on the path", async () => {
const user = userEvent.setup();
render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
await user.click(screen.getByRole("button", { name: "Review" }));
await screen.findByTestId("lane-changes-review");
screen.getByRole("button", { name: "server/lib/git-ops.js" }).focus();
await user.keyboard("{Enter}");
await waitFor(() =>
expect(api.lanes.changes).toHaveBeenCalledWith(7, {
range: "work",
path: "server/lib/git-ops.js",
context: 3,
})
);
});
it("drops a quick-open answer for the lane it has already left", async () => {
const user = userEvent.setup();
let answer: (v: { paths: string[] }) => void = () => {};
vi.mocked(api.lanes.gitLs).mockReturnValueOnce(
new Promise((r) => {
answer = r as typeof answer;
}) as ReturnType<typeof api.lanes.gitLs>
);
const { rerender } = render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
await user.click(screen.getByRole("button", { name: "Files" }));
await user.type(await screen.findByLabelText("Find a file by path…"), "main");
await waitFor(() => expect(api.lanes.gitLs).toHaveBeenCalledWith(7, "main"));
rerender(<LaneChangesPanel laneId={8} />);
await act(async () => answer({ paths: ["from/lane7.ts"] }));
// Back in Files on lane 8, before its own search lands: nothing of lane 7.
await user.click(screen.getByRole("button", { name: "Files" }));
expect(screen.queryByText("from/lane7.ts")).toBeNull();
});
it("keeps the newest quick-open answer when an older one lands after it", async () => {
const user = userEvent.setup();
let answer: (v: { paths: string[] }) => void = () => {};
vi.mocked(api.lanes.gitLs)
.mockReturnValueOnce(
new Promise((r) => {
answer = r as typeof answer;
}) as ReturnType<typeof api.lanes.gitLs>
)
.mockResolvedValueOnce({
available: true,
paths: ["new/mainx.ts"],
truncated: false,
total: 1,
});
render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
await user.click(screen.getByRole("button", { name: "Files" }));
const box = await screen.findByLabelText("Find a file by path…");
await user.type(box, "main");
await waitFor(() => expect(api.lanes.gitLs).toHaveBeenCalledWith(7, "main"));
await user.type(box, "x");
expect(await screen.findByText("new/mainx.ts")).toBeInTheDocument();
await act(async () => answer({ paths: ["old/main-only.ts"] }));
expect(screen.queryByText("old/main-only.ts")).toBeNull();
});
it("goes back to the list it came from, at the offset it was left at", async () => {
const user = userEvent.setup();
render(<LaneChangesPanel laneId={7} />);
@@ -537,4 +686,152 @@ describe("LaneChangesPanel", () => {
expect(await screen.findByTestId("lane-changes-review")).toBeInTheDocument();
expect(screen.getByTestId("lane-changes-body").scrollTop).toBe(640);
});
it("opens an unchanged tracked file from Files with no error banner", async () => {
const user = userEvent.setup();
render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
vi.mocked(api.lanes.changes).mockRejectedValue(
Object.assign(new Error("file has no changes in this range"), {
code: "ENOFILECHANGE",
status: 400,
})
);
await user.click(screen.getByRole("button", { name: "Files" }));
await user.type(await screen.findByLabelText("Find a file by path…"), "main");
await user.click(await screen.findByText("src/main.ts"));
expect(await screen.findByTestId("lane-file-view")).toHaveTextContent("const whole = 1;");
await user.click(screen.getByRole("button", { name: "Refresh" }));
await waitFor(() => expect(api.lanes.changes).toHaveBeenCalledTimes(3));
expect(screen.queryByRole("alert")).toBeNull();
expect(screen.getByTestId("lane-file-view")).toBeInTheDocument();
});
it("keeps the overview rows mounted across re-renders (typing in the commit box)", async () => {
const user = userEvent.setup();
render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-commit");
const before = screen.getByText("server/lib/git-ops.js");
await user.type(screen.getByLabelText("Commit message"), "x");
expect(screen.getByText("server/lib/git-ops.js")).toBe(before);
});
it("expands all folders with at most four tree reads in flight", async () => {
const user = userEvent.setup();
let inFlight = 0;
let peak = 0;
vi.mocked(api.lanes.gitTree).mockClear();
vi.mocked(api.lanes.gitTree).mockImplementation(async (_id, path = "") => {
inFlight += 1;
peak = Math.max(peak, inFlight);
await new Promise((r) => setTimeout(r, 5));
inFlight -= 1;
const depth = path ? path.split("/").length : 0;
const entries =
depth >= 2
? [{ name: "leaf.ts", path: `${path}/leaf.ts`, dir: false }]
: Array.from({ length: 5 }, (_, i) => ({
name: `d${i}`,
path: path ? `${path}/d${i}` : `d${i}`,
dir: true,
}));
return { available: true, path, entries, truncated: false };
});
render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
await user.click(screen.getByRole("button", { name: "Files" }));
await screen.findByText("d0");
await user.click(screen.getByRole("button", { name: "Expand all folders" }));
await waitFor(() => expect(screen.getAllByText("leaf.ts")).toHaveLength(25));
// Root + 5 + 25 folders, each fetched exactly once.
expect(api.lanes.gitTree).toHaveBeenCalledTimes(31);
expect(peak).toBeLessThanOrEqual(4);
});
it("does not repaint the previous lane after its git action resolves post-switch", async () => {
const user = userEvent.setup();
let resolveAction: (v: { action: string; ok: true; output: string }) => void = () => {};
vi.mocked(api.lanes.gitAction).mockReturnValue(
new Promise((r) => (resolveAction = r)) as ReturnType<typeof api.lanes.gitAction>
);
vi.mocked(api.lanes.changes).mockImplementation(async (id) =>
id === 7
? changes()
: changes({
files: [
{
path: "lane8.txt",
status: "??",
untracked: true,
added: 1,
deleted: 0,
binary: false,
},
],
})
);
const { rerender } = render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
const [stage] = screen.getAllByRole("button", { name: "Stage this file" });
await user.click(stage!);
rerender(<LaneChangesPanel laneId={8} />);
expect(await screen.findByText("lane8.txt")).toBeInTheDocument();
const lane7Reads = vi.mocked(api.lanes.changes).mock.calls.filter(([id]) => id === 7).length;
resolveAction({ action: "stage", ok: true, output: "" });
await new Promise((r) => setTimeout(r, 20));
expect(vi.mocked(api.lanes.changes).mock.calls.filter(([id]) => id === 7)).toHaveLength(
lane7Reads
);
expect(screen.getByText("lane8.txt")).toBeInTheDocument();
expect(screen.queryByText("server/lib/git-ops.js")).toBeNull();
});
it("does not paint the previous lane's tree when an expand-all walk outlives a lane switch", async () => {
const user = userEvent.setup();
let resolveSrc: () => void = () => {};
vi.mocked(api.lanes.gitTree).mockImplementation((id, path) => {
if (id === 7 && path === "src")
return new Promise(
(r) =>
(resolveSrc = () =>
r({
available: true,
path: "src",
entries: [{ name: "main.ts", path: "src/main.ts", dir: false }],
truncated: false,
}))
);
return Promise.resolve({
available: true,
path: "",
entries: [
id === 7
? { name: "src", path: "src", dir: true }
: { name: "lib8", path: "lib8", dir: false },
],
truncated: false,
});
});
const { rerender } = render(<LaneChangesPanel laneId={7} />);
await screen.findByTestId("lane-changes-overview");
await user.click(screen.getByRole("button", { name: "Files" }));
await screen.findByText("src");
await user.click(screen.getByRole("button", { name: "Expand all folders" }));
rerender(<LaneChangesPanel laneId={8} />);
await user.click(await screen.findByRole("button", { name: "Files" }));
expect(await screen.findByText("lib8")).toBeInTheDocument();
resolveSrc();
await new Promise((r) => setTimeout(r, 20));
expect(screen.getByText("lib8")).toBeInTheDocument();
expect(screen.queryByText("src")).toBeNull();
expect(screen.queryByText("main.ts")).toBeNull();
expect(screen.getByRole("button", { name: "Expand all folders" })).toBeEnabled();
});
});
@@ -3,13 +3,21 @@
* @description Pins the side-by-side renderer: two independently scrolling
* columns (a long line must be reachable, not painted over its neighbour)
* whose horizontal scroll is mirrored, so the two halves of a line stay
* opposite each other.
* opposite each other. Also pins the clamped mirroring (a narrow column may
* not drag the wide one back) and the row windowing of large diffs.
* @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
*/
import { describe, it, expect } from "vitest";
import { fireEvent, render, screen } from "@testing-library/react";
import { LaneDiffView } from "../LaneDiffView";
import {
LaneDiffView,
LaneFileView,
ROW_PX,
WINDOW_THRESHOLD,
analyseHunk,
visibleRange,
} from "../LaneDiffView";
import type { LaneChangeFile } from "../../../lib/types";
const FILE: LaneChangeFile = {
@@ -33,6 +41,17 @@ const FILE: LaneChangeFile = {
],
};
/** jsdom has no layout: give a scroller the extents a browser would. */
function layout(
el: HTMLElement,
g: { scrollWidth?: number; clientWidth?: number; scrollHeight?: number; clientHeight?: number }
) {
for (const [k, v] of Object.entries(g))
Object.defineProperty(el, k, { value: v, configurable: true });
}
const ROOMY = { scrollWidth: 2000, clientWidth: 200, scrollHeight: 2000, clientHeight: 200 };
describe("LaneDiffView — side by side", () => {
it("gives each column its own scroller", () => {
render(<LaneDiffView file={FILE} layout="split" />);
@@ -56,6 +75,8 @@ describe("LaneDiffView — side by side", () => {
render(<LaneDiffView file={FILE} layout="split" />);
const left = screen.getByTestId("lane-diff-split-left");
const right = screen.getByTestId("lane-diff-split-right");
layout(left, ROOMY);
layout(right, ROOMY);
left.scrollLeft = 320;
fireEvent.scroll(left);
@@ -66,6 +87,55 @@ describe("LaneDiffView — side by side", () => {
expect(left.scrollLeft).toBe(0);
});
it("keeps the split columns on the same row vertically too", () => {
render(<LaneDiffView file={FILE} layout="split" />);
const left = screen.getByTestId("lane-diff-split-left");
const right = screen.getByTestId("lane-diff-split-right");
layout(left, ROOMY);
layout(right, ROOMY);
left.scrollTop = 480;
fireEvent.scroll(left);
expect(right.scrollTop).toBe(480);
right.scrollTop = 40;
fireEvent.scroll(right);
expect(left.scrollTop).toBe(40);
});
it("clamps the mirrored offset to the other column's own extent", () => {
render(<LaneDiffView file={FILE} layout="split" />);
const left = screen.getByTestId("lane-diff-split-left");
const right = screen.getByTestId("lane-diff-split-right");
layout(left, { scrollWidth: 500, clientWidth: 200, scrollHeight: 300, clientHeight: 200 });
layout(right, { scrollWidth: 1000, clientWidth: 200, scrollHeight: 300, clientHeight: 200 });
right.scrollLeft = 600;
right.scrollTop = 250;
fireEvent.scroll(right);
expect(left.scrollLeft).toBe(300);
expect(left.scrollTop).toBe(100);
});
it("does not let the narrow column's clamped echo drag the wide one back", () => {
render(<LaneDiffView file={FILE} layout="split" />);
const left = screen.getByTestId("lane-diff-split-left");
const right = screen.getByTestId("lane-diff-split-right");
layout(left, { scrollWidth: 500, clientWidth: 200 });
layout(right, { scrollWidth: 1000, clientWidth: 200 });
right.scrollLeft = 600;
fireEvent.scroll(right);
// A browser fires the narrow column's scroll for the clamped write.
fireEvent.scroll(left);
expect(right.scrollLeft).toBe(600);
// A real move of the narrow column still carries the wide one.
left.scrollLeft = 100;
fireEvent.scroll(left);
expect(right.scrollLeft).toBe(100);
});
it("keeps the unified layout on one scroller", () => {
render(<LaneDiffView file={FILE} layout="unified" />);
expect(screen.queryByTestId("lane-diff-split-left")).toBeNull();
@@ -158,3 +228,154 @@ describe("LaneDiffView — row styling", () => {
expect(left!.className).not.toMatch(/status-(success|danger)/);
});
});
describe("analyseHunk", () => {
const hunk = {
header: "@@ -1,4 +1,4 @@",
context: "",
oldStart: 1,
newStart: 1,
lines: [
{ type: "ctx" as const, oldLine: 1, newLine: 1, text: "keep" },
{ type: "del" as const, oldLine: 2, newLine: null, text: "foo = 1" },
{ type: "add" as const, oldLine: null, newLine: 2, text: "foo = 2" },
{ type: "del" as const, oldLine: 3, newLine: null, text: "bar = 1" },
{ type: "add" as const, oldLine: null, newLine: 3, text: "bar = 2" },
],
};
it("pairs each del/add with its emphasis, keyed by line index", () => {
const a = analyseHunk(hunk);
expect(a.rows).toHaveLength(3);
expect(a.emph.get(1)).toEqual([6, 7]);
expect(a.emph.get(2)).toEqual([6, 7]);
expect(a.emph.get(3)).toEqual([6, 7]);
expect(a.emph.get(4)).toEqual([6, 7]);
expect(a.emph.has(0)).toBe(false);
});
it("computes once per hunk, so both split columns and re-renders share it", () => {
expect(analyseHunk(hunk)).toBe(analyseHunk(hunk));
});
});
describe("visibleRange", () => {
it("covers the viewport plus overscan on both sides", () => {
expect(visibleRange(0, 160, 16, 1000, 5)).toEqual({ start: 0, end: 15 });
expect(visibleRange(1600, 160, 16, 1000, 5)).toEqual({ start: 95, end: 115 });
});
it("clamps a scrollTop past the content to the last full viewport", () => {
expect(visibleRange(99999, 160, 16, 1000, 5)).toEqual({ start: 985, end: 1000 });
expect(visibleRange(-50, 160, 16, 1000, 5)).toEqual({ start: 0, end: 15 });
});
it("never runs past a short list", () => {
expect(visibleRange(0, 800, 16, 3, 5)).toEqual({ start: 0, end: 3 });
expect(visibleRange(0, 800, 16, 0, 5)).toEqual({ start: 0, end: 0 });
});
});
function bigFile(n: number): LaneChangeFile {
const lines = Array.from({ length: n }, (_, i) =>
i % 2
? { type: "add" as const, oldLine: null, newLine: i + 1, text: `line ${i};` }
: { type: "ctx" as const, oldLine: i + 1, newLine: i + 1, text: `line ${i};` }
);
lines[7] = { type: "ctx", oldLine: 8, newLine: 8, text: `line 7; ${"w".repeat(300)}` };
return fileWith(lines);
}
const rowsIn = (el: HTMLElement) => [...el.querySelectorAll<HTMLElement>("div.flex.w-max")];
describe("LaneDiffView — windowing", () => {
it("renders every row below the threshold, with no spacers", () => {
const { container } = render(
<LaneDiffView file={bigFile(WINDOW_THRESHOLD - 10)} layout="unified" />
);
expect(rowsIn(container)).toHaveLength(WINDOW_THRESHOLD - 10);
expect(container.querySelector("[data-diff-spacer]")).toBeNull();
});
it("renders far fewer rows than a 5000-line diff holds, keeping the full scroll height", () => {
const { container } = render(<LaneDiffView file={bigFile(5000)} layout="unified" />);
const rows = rowsIn(container);
expect(rows.length).toBeGreaterThan(0);
expect(rows.length).toBeLessThan(300);
const spacers = [...container.querySelectorAll<HTMLElement>("[data-diff-spacer]")];
const spaced = spacers.reduce((sum, s) => sum + parseFloat(s.style.height), 0);
// header + 5000 lines, every item one fixed row tall
const rendered = container.querySelectorAll("[data-diff-item]").length;
expect(spaced + rendered * ROW_PX).toBe(5001 * ROW_PX);
});
it("moves the window with the scroll", () => {
const { container } = render(<LaneDiffView file={bigFile(5000)} layout="unified" />);
const view = screen.getByTestId("lane-diff-view");
expect(container.textContent).not.toContain("line 3000;");
view.scrollTop = 3000 * ROW_PX;
fireEvent.scroll(view);
expect(container.textContent).toContain("line 3000;");
expect(container.textContent).not.toContain("line 10;");
});
it("starts windowing where the reader is when a diff grows past the threshold", () => {
const { container, rerender } = render(<LaneDiffView file={bigFile(400)} layout="unified" />);
const view = screen.getByTestId("lane-diff-view");
view.scrollTop = 350 * ROW_PX;
fireEvent.scroll(view);
// Expanding context replaces the file in place, same mounted view.
rerender(<LaneDiffView file={bigFile(600)} layout="unified" />);
expect(container.textContent).toContain("line 350;");
});
it("starts from the top again after a round trip through split", () => {
const { container, rerender } = render(<LaneDiffView file={bigFile(5000)} layout="unified" />);
const view = screen.getByTestId("lane-diff-view");
view.scrollTop = 3000 * ROW_PX;
fireEvent.scroll(view);
rerender(<LaneDiffView file={bigFile(5000)} layout="split" />);
// In split the outer box is no scroller; the browser drops its offset.
screen.getByTestId("lane-diff-view").scrollTop = 0;
rerender(<LaneDiffView file={bigFile(5000)} layout="unified" />);
expect(container.textContent).toContain("line 5;");
});
it("holds the horizontal extent at the longest line, rendered or not", () => {
const { container } = render(<LaneDiffView file={bigFile(5000)} layout="unified" />);
const view = screen.getByTestId("lane-diff-view");
view.scrollTop = 3000 * ROW_PX;
fireEvent.scroll(view);
const content = container.querySelector<HTMLElement>("[data-diff-content]")!;
// the 300-w line 7 is off screen now, and still sets the width
expect(content.style.minWidth).toContain(`${"line 7; ".length + 300 + 1}ch`);
});
it("windows both split columns over the same row range", () => {
render(<LaneDiffView file={bigFile(5000)} layout="split" />);
const left = screen.getByTestId("lane-diff-split-left");
const right = screen.getByTestId("lane-diff-split-right");
layout(left, { scrollHeight: 5001 * ROW_PX, clientHeight: 400 });
layout(right, { scrollHeight: 5001 * ROW_PX, clientHeight: 400 });
right.scrollTop = 2000 * ROW_PX;
fireEvent.scroll(right);
expect(left.scrollTop).toBe(2000 * ROW_PX);
const l = rowsIn(left);
const r = rowsIn(right);
expect(l.length).toBeLessThan(300);
expect(l).toHaveLength(r.length);
expect(right.textContent).toContain("line 2001;");
// same rows: the right column's add has its filler row on the left
expect(left.textContent).toContain("line 2000;");
});
it("windows a whole-file read too", () => {
const lines = Array.from({ length: 5000 }, (_, i) => `row ${i}`);
const { container } = render(<LaneFileView path="a.ts" lines={lines} />);
expect(rowsIn(container).length).toBeLessThan(300);
const view = screen.getByTestId("lane-file-view");
view.scrollTop = 4000 * ROW_PX;
fireEvent.scroll(view);
expect(container.textContent).toContain("row 4000");
});
});
@@ -120,6 +120,15 @@ describe("LaneGitBar", () => {
);
});
it("re-reads the branch list after a switch, so the branch just left is not held", async () => {
const user = userEvent.setup();
render(<LaneGitBar laneId={3} git={facts({ dirty: 0, untracked: 0 })} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /Branch/ }));
await user.selectOptions(await screen.findByLabelText("Switch branch…"), "development");
await user.click(screen.getByRole("button", { name: "Switch branch" }));
await waitFor(() => expect(api.lanes.gitBranches).toHaveBeenCalledTimes(2));
});
it("creates a branch without switching, then offers a sibling lane on it", async () => {
const user = userEvent.setup();
const onNewLane = vi.fn();
@@ -146,6 +155,34 @@ describe("LaneGitBar", () => {
expect(onNewLane).toHaveBeenCalledWith("development");
});
it("offers a sibling lane only on a branch no worktree holds — the server refuses the rest", async () => {
vi.mocked(api.lanes.gitBranches).mockResolvedValue({
available: true,
branches: ["development", "feat/thing", "feat/free"],
current: "feat/thing",
worktrees: [
{ path: "/repo/lane3", branch: "feat/thing" },
{ path: "/repo/dev", branch: "development" },
],
});
const user = userEvent.setup();
render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} onNewLane={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /Branch/ }));
const select = await screen.findByLabelText("Switch branch…");
const newLane = () => screen.getByRole("button", { name: "New lane here" });
// This lane's own branch: its worktree is this lane.
await user.selectOptions(select, "feat/thing");
expect(newLane()).toBeDisabled();
// Held by another worktree: git allows one worktree per branch (EBRANCHBUSY).
await user.selectOptions(select, "development");
expect(newLane()).toBeDisabled();
expect(newLane()).toHaveAttribute("title", expect.stringContaining("/repo/dev"));
await user.selectOptions(select, "feat/free");
expect(newLane()).toBeEnabled();
});
it("commits only the index when asked", async () => {
const user = userEvent.setup();
render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
@@ -172,4 +209,115 @@ describe("LaneGitBar", () => {
await user.click(screen.getByRole("button", { name: /Push/ }));
expect(await screen.findByTestId("lane-git-bar-error")).toHaveTextContent("non-fast-forward");
});
it("keeps a half-typed commit message through a fetch", async () => {
const user = userEvent.setup();
render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /^Commit$/ }));
await user.type(screen.getByLabelText("Commit message"), "fix: half");
await user.click(screen.getByRole("button", { name: /Fetch/ }));
await waitFor(() => expect(api.lanes.gitAction).toHaveBeenCalledWith(3, "fetch", {}));
expect(screen.getByLabelText("Commit message")).toHaveValue("fix: half");
});
it("clears and closes the commit box once the commit lands", async () => {
const user = userEvent.setup();
render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /^Commit$/ }));
await user.type(screen.getByLabelText("Commit message"), "fix: done");
await user.click(screen.getByRole("button", { name: /Commit 3 files/ }));
await waitFor(() => expect(screen.queryByLabelText("Commit message")).toBeNull());
});
it("drops the commit box and message on a lane switch, so Enter cannot commit lane B under lane A's message", async () => {
const user = userEvent.setup();
const { rerender } = render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /^Commit$/ }));
await user.type(screen.getByLabelText("Commit message"), "fix: lane three");
rerender(<LaneGitBar laneId={4} git={facts()} onChanged={vi.fn()} />);
expect(screen.queryByLabelText("Commit message")).toBeNull();
await user.click(screen.getByRole("button", { name: /^Commit$/ }));
expect(screen.getByLabelText("Commit message")).toHaveValue("");
await user.keyboard("{Enter}");
expect(api.lanes.gitAction).not.toHaveBeenCalled();
});
it("re-reads the branch list for the new lane instead of showing the old one's", async () => {
const user = userEvent.setup();
const { rerender } = render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /Branch/ }));
await user.selectOptions(await screen.findByLabelText("Switch branch…"), "development");
rerender(<LaneGitBar laneId={4} git={facts()} onChanged={vi.fn()} />);
expect(screen.queryByLabelText("Switch branch…")).toBeNull();
await user.click(screen.getByRole("button", { name: /Branch/ }));
await waitFor(() => expect(api.lanes.gitBranches).toHaveBeenCalledWith(4));
expect(await screen.findByLabelText("Switch branch…")).toHaveValue("");
});
it("sends one commit for a double Enter", async () => {
vi.mocked(api.lanes.gitAction).mockReturnValue(new Promise(() => {}));
const user = userEvent.setup();
render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /^Commit$/ }));
await user.type(screen.getByLabelText("Commit message"), "fix: once{Enter}{Enter}");
expect(api.lanes.gitAction).toHaveBeenCalledTimes(1);
expect(screen.getByRole("button", { name: "Commit staged" })).toBeDisabled();
});
it("forgets which branches the previous lane's worktrees held once the lane changes", async () => {
let resolveOld: (v: Awaited<ReturnType<typeof api.lanes.gitBranches>>) => void = () => {};
vi.mocked(api.lanes.gitBranches).mockReturnValueOnce(
new Promise((r) => {
resolveOld = r;
})
);
const user = userEvent.setup();
const { rerender } = render(
<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} onNewLane={vi.fn()} />
);
await user.click(screen.getByRole("button", { name: /Branch/ }));
rerender(<LaneGitBar laneId={4} git={facts()} onChanged={vi.fn()} onNewLane={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /Branch/ }));
const select = await screen.findByLabelText("Switch branch…");
await waitFor(() => expect(api.lanes.gitBranches).toHaveBeenCalledWith(4));
// Lane 3's answer lands late: its worktree held `development`.
resolveOld({
available: true,
branches: ["development", "feat/thing"],
current: "feat/thing",
worktrees: [{ path: "/repo/dev", branch: "development" }],
});
await user.selectOptions(select, "development");
const newLane = screen.getByRole("button", { name: "New lane here" });
expect(newLane).toBeEnabled();
expect(newLane).not.toHaveAttribute("title", expect.stringContaining("/repo/dev"));
});
it("claims no sync state when the upstream comparison could not be counted", () => {
render(
<LaneGitBar
laneId={3}
git={facts({ upstream: "origin/gone", ahead: null, behind: null })}
onChanged={vi.fn()}
/>
);
expect(screen.queryByText("in sync")).toBeNull();
expect(screen.queryByTestId("lane-git-tracking")).toBeNull();
});
it("explains a push with nowhere to go instead of the server's generic text", async () => {
const user = userEvent.setup();
vi.mocked(api.lanes.gitAction).mockRejectedValue(
Object.assign(new Error("this repository has no remote to push to"), { code: "ENOREMOTE" })
);
render(<LaneGitBar laneId={3} git={facts()} onChanged={vi.fn()} />);
await user.click(screen.getByRole("button", { name: /Push/ }));
expect(await screen.findByTestId("lane-git-bar-error")).toHaveTextContent(
"No remote to push to or pull from"
);
});
});