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import * as cp from 'child_process'
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import { mkdir, writeFile } from 'fs/promises'
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import { join, isAbsolute } from 'path'
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import { tmpdir } from 'os'
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import { promisify } from 'util'
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const exec = promisify(cp.exec)
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export const tests = []
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export const setup = async ({ path }) => {
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const randomFilesNumber = Math.floor(Math.random() * (30 - 1) + 1)
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const dir = `${tmpdir()}/tell-me-how-many`
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await mkdir(dir)
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for (let i = 0; i < randomFilesNumber; i++) {
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await writeFile(`${dir}/${i}.txt`, '', 'utf8')
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}
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const run = async (cmd) => {
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const cmdPath = isAbsolute(cmd || '') ? cmd : join(dir, cmd || '')
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const { stdout } = await exec(`node ${path} ${cmdPath}`)
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return { stdout: stdout.trim() }
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}
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return { randomFilesNumber, tmpPath: dir, run }
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}
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tests.push(async ({ path, eq, ctx }) => {
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// will execute the script in a folder named `tell-me-how-many`
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// '../tell-me-how-many' in the argument passed
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// `tell-me-how-many` folder has a random file number
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const { stdout } = await ctx.run('../tell-me-how-many')
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return eq(Number(stdout), ctx.randomFilesNumber)
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})
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tests.push(async ({ path, eq, ctx }) => {
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// will execute the script without argument
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const { stdout } = await ctx.run()
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return eq(Number(stdout), ctx.randomFilesNumber)
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})
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tests.push(async ({ path, eq, ctx }) => {
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// will execute the script with `tell-me-how-many` folder's absolute path as argument
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const { stdout } = await ctx.run(ctx.tmpPath)
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return eq(Number(stdout), ctx.randomFilesNumber)
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})
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Object.freeze(tests)
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