nova28
0243663ec6
Co-authored-by: nova28 <17953305+nova28@users.noreply.github.com> Co-authored-by: Carlos Florencio <carlosmflorencio@gmail.com>
47 lines
1.7 KiB
TypeScript
47 lines
1.7 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import { renderHook, act } from "@testing-library/react";
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import { useLatestOnly } from "./use-latest-only";
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// Regression for the Office task-detail refetch race: a WS trigger can
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// fire again before a prior GET resolves, and a slower earlier response
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// can arrive after a faster later one. useLatestOnly must let the caller
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// discard the stale response regardless of arrival order.
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describe("useLatestOnly", () => {
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it("marks only the most recently begun token as current", () => {
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const { result } = renderHook(() => useLatestOnly());
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let tokenA = -1;
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let tokenB = -1;
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act(() => {
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tokenA = result.current.begin();
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tokenB = result.current.begin();
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});
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expect(result.current.isCurrent(tokenA)).toBe(false);
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expect(result.current.isCurrent(tokenB)).toBe(true);
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});
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it("discards an earlier call's result when it resolves after a later call started", async () => {
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const { result } = renderHook(() => useLatestOnly());
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const applied: string[] = [];
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// Simulates the exact race: call A starts, call B starts before A
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// resolves, then A's (stale) response arrives followed by B's.
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const tokenA = result.current.begin();
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const tokenB = result.current.begin();
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if (result.current.isCurrent(tokenA)) applied.push("A");
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if (result.current.isCurrent(tokenB)) applied.push("B");
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expect(applied).toEqual(["B"]);
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});
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it("accepts a call's result when no newer call has started since", () => {
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const { result } = renderHook(() => useLatestOnly());
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const token = result.current.begin();
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expect(result.current.isCurrent(token)).toBe(true);
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});
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});
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