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TypeScript

import { render, screen, waitFor, within } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { describe, expect, it, vi } from "vitest";
import { CandidateLab } from "../../src/components/CandidateLab";
import { createEmptyPuzzle, normalizePuzzle } from "../../src/domain";
import type { CandidateOverlay } from "../../src/helpers";
function mask(...values: number[]): number {
return values.reduce((result, value) => result | (1 << (value - 1)), 0);
}
const puzzle = normalizePuzzle(createEmptyPuzzle(4));
describe("candidate lab", () => {
it("inspects selected cells, filters digits and focuses a link overlay", async () => {
const user = userEvent.setup();
const overlays: (CandidateOverlay | undefined)[] = [];
const candidateMasks = new Array<number>(16).fill(0);
candidateMasks[0] = mask(1, 2);
candidateMasks[1] = mask(1, 2);
render(
<CandidateLab
puzzle={puzzle}
values={puzzle.givens}
candidateMasks={candidateMasks}
selectedCells={[0]}
onOverlayChange={(overlay) => overlays.push(overlay)}
/>,
);
const selected = screen.getByRole("heading", {
name: "Selected cells",
}).parentElement!;
expect(within(selected).getByText("r1c1")).toBeInTheDocument();
expect(within(selected).getByText("1 2")).toBeInTheDocument();
await user.click(
screen.getByRole("button", { name: "Filter candidate 1" }),
);
await waitFor(() => {
expect(overlays.at(-1)?.activeValues).toEqual([1]);
expect(overlays.at(-1)?.candidateCells).toEqual([0, 1]);
});
const link = screen.getByRole("button", { name: /r1c1\(1\).*r1c2\(1\)/u });
await user.click(link);
await waitFor(() => expect(overlays.at(-1)?.links).toHaveLength(1));
expect(link).toHaveAttribute("aria-pressed", "true");
await user.click(screen.getByRole("button", { name: "Show all" }));
expect(link).toHaveAttribute("aria-pressed", "false");
});
it("reveals weak links on demand within a chosen house", async () => {
const user = userEvent.setup();
const candidateMasks = new Array<number>(16).fill(0);
candidateMasks[0] = mask(3);
candidateMasks[1] = mask(3);
candidateMasks[2] = mask(3);
render(
<CandidateLab
puzzle={puzzle}
values={puzzle.givens}
candidateMasks={candidateMasks}
selectedCells={[0]}
/>,
);
await user.selectOptions(
screen.getByLabelText("Candidate house scope"),
"unit:0",
);
await user.click(
screen.getByRole("button", { name: "Filter candidate 3" }),
);
expect(screen.getByText(/No links match this scope/u)).toBeInTheDocument();
await user.click(screen.getByRole("checkbox", { name: "Weak links" }));
expect(
screen.getAllByRole("button", { name: /weak · Row 1/u }),
).toHaveLength(3);
});
it("clears the board overlay when it unmounts", async () => {
const onOverlayChange = vi.fn();
const { unmount } = render(
<CandidateLab
puzzle={puzzle}
values={puzzle.givens}
candidateMasks={new Array<number>(16).fill(0)}
selectedCells={[0]}
onOverlayChange={onOverlayChange}
/>,
);
await waitFor(() => expect(onOverlayChange).toHaveBeenCalled());
unmount();
expect(onOverlayChange).toHaveBeenLastCalledWith(undefined);
});
});