Archived
54 lines
1.4 KiB
TypeScript
54 lines
1.4 KiB
TypeScript
import { describe, expect, it, vi, beforeEach, afterEach } from "bun:test";
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import { get } from "svelte/store";
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import { useSWR } from "../index";
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// Mock fetcher
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const fetcher = vi.fn((key: string) => Promise.resolve(`data-${key}`));
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describe("useSWR (Svelte)", () => {
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beforeEach(() => {
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vi.useFakeTimers();
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fetcher.mockClear();
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});
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afterEach(() => {
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vi.useRealTimers();
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});
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it("fetches data on mount", async () => {
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const { data, isLoading } = useSWR("test-key", fetcher);
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// Initial state (synchronously set by my core change)
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expect(get(isLoading)).toBe(true);
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// Wait for fetch
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vi.runAllTimers();
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expect(get(data)).toBe("data-test-key");
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expect(get(isLoading)).toBe(false);
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});
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it("deduplicates requests", async () => {
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const { data: d1 } = useSWR("dedupe-key", fetcher);
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const { data: d2 } = useSWR("dedupe-key", fetcher);
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vi.runAllTimers();
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expect(fetcher).toHaveBeenCalledTimes(1);
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expect(get(d1)).toBe("data-dedupe-key");
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expect(get(d2)).toBe("data-dedupe-key");
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});
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it("mutates data manually", async () => {
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const { data, mutate } = useSWR("mutate-key", fetcher);
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vi.runAllTimers();
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expect(get(data)).toBe("data-mutate-key");
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await mutate("new-data");
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expect(get(data)).toBe("new-data");
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});
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});
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