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33 lines
845 B
33 lines
845 B
Array.prototype.forEach = undefined |
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// /*/ // ⚡ |
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export const tests = [] |
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const t = (f) => tests.push(f) |
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export const setup = () => { |
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const arr = [1, 2, 3, 4, 5, Math.random(), 7, 10, -10, 20, -95] |
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Object.getPrototypeOf([]).proto = ' [avoid for..in] ' |
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return { arr } |
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} |
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t(({ eq, ctx }) => { |
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// callback is call with the item value |
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const result = [] |
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forEach(ctx.arr, (value) => result.push(value)) |
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return eq(result, ctx.arr) |
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}) |
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t(({ eq, ctx }) => { |
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// callback second parameter is the index |
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const result = [] |
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forEach(ctx.arr, (_, index) => result.push(index)) |
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return eq(result, [...ctx.arr.keys()]) |
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}) |
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t(({ eq, ctx }) => { |
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// callback third parameter is the array |
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const result = [] |
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forEach(ctx.arr, (_, __, arr) => result.push(arr)) |
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return eq(result, Array(ctx.arr.length).fill(ctx.arr)) |
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}) |
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Object.freeze(tests)
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