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export const tests = []
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const t = (f) => tests.push(f)
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const add = (arr, el) => arr.push(el)
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// async setInterval is not precise enough so I made this synchronous one
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const setIntervalSync = (fn, delay, limit) => {
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let run = true
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let count = 1
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const start = Date.now()
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while (run) {
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const tick = Date.now()
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const elapsed = tick - start
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if (elapsed > count * delay) {
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console.log({ elapsed, count })
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fn()
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count++
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if (count >= limit) return
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}
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}
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}
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// it uses the array to better test the leading and trailing edge of the time limit
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// so if the leading edge is true it will execute the callback
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// if the trailing edge is true it will execute the callback before returning the array
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const run = (callback, { delay, count }) => {
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const arr = []
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setIntervalSync(() => callback(arr, 1), delay, count)
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return arr.length
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}
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t(async ({ eq }) =>
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// test with debounce wait limit inferior to wait time call (how much time we wait to the function be called again)
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// it works concurrently
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eq(
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await Promise.all([
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run(debounce(add, 5), { delay: 10, count: 5 }),
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run(debounce(add, 2), { delay: 5, count: 10 }),
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]),
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[4, 9]
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)
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)
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t(async ({ eq }) =>
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// testing with wait limit superior to wait time call
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// execution on the trailing edge, after wait limit has elapsed
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eq(await run(debounce(add, 10), { delay: 5, count: 5 }), 0)
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)
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t(async ({ eq }) =>
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// it works concurrently
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eq(
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await Promise.all([
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run(opDebounce(add, 4), { delay: 2, count: 5 }),
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run(opDebounce(add, 4), { delay: 2, count: 2 }),
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]),
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[0, 0]
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)
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)
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t(async ({ eq }) =>
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// leading edge as true
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// it works concurrently
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eq(
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await Promise.all([
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run(opDebounce(add, 20, { leading: true }), { delay: 7, count: 3 }),
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run(opDebounce(add, 10, { leading: true }), { delay: 14, count: 3 }),
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]),
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[1, 2]
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)
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)
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Object.freeze(tests)
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