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import { act, renderHook } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { useRate } from "#/hooks/use-rate";
describe("useRate", () => {
beforeEach(() => {
vi.useFakeTimers();
});
afterEach(() => {
vi.useRealTimers();
});
it("should initialize", () => {
const { result } = renderHook(() => useRate());
expect(result.current.items).toHaveLength(0);
expect(result.current.rate).toBeNull();
expect(result.current.lastUpdated).toBeNull();
expect(result.current.isUnderThreshold).toBe(true);
});
it("should handle the case of a single element", () => {
const { result } = renderHook(() => useRate());
act(() => {
result.current.record(123);
});
expect(result.current.items).toHaveLength(1);
expect(result.current.lastUpdated).not.toBeNull();
});
it("should return the difference between the last two elements", () => {
const { result } = renderHook(() => useRate());
vi.setSystemTime(500);
act(() => {
result.current.record(4);
});
vi.advanceTimersByTime(500);
act(() => {
result.current.record(9);
});
expect(result.current.items).toHaveLength(2);
expect(result.current.rate).toBe(5);
expect(result.current.lastUpdated).toBe(1000);
});
it("should update isUnderThreshold after [threshold]ms of no activity", () => {
const { result } = renderHook(() => useRate({ threshold: 500 }));
expect(result.current.isUnderThreshold).toBe(true);
act(() => {
// not sure if fake timers is buggy with intervals,
// but I need to call it twice to register
vi.advanceTimersToNextTimer();
vi.advanceTimersToNextTimer();
});
expect(result.current.isUnderThreshold).toBe(false);
});
it("should return an isUnderThreshold boolean", () => {
const { result } = renderHook(() => useRate({ threshold: 500 }));
vi.setSystemTime(500);
act(() => {
result.current.record(400);
});
act(() => {
result.current.record(1000);
});
expect(result.current.isUnderThreshold).toBe(false);
act(() => {
result.current.record(1500);
});
expect(result.current.isUnderThreshold).toBe(true);
act(() => {
vi.advanceTimersToNextTimer();
vi.advanceTimersToNextTimer();
});
expect(result.current.isUnderThreshold).toBe(false);
});
});
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