@onflow/flow-js-testing/examples/run.js

This package will expose a set of utility methods, to allow Cadence code testing with libraries like Jest

const path = require("path")
const fs = require("fs")

// Regexp to match files in folder
const exampleMatcher = /(\.\/)?\w{1,3}-.*\.js/g

const printTitle = (exampleName, padSymbol) => {
  if (exampleName.endsWith(".js")) {
    exampleName = exampleName.slice(0, -3)
  }
  const fixedName = exampleName
    .split("-")
    .map((item, i) => {
      return i === 0 ? `#${item} -` : item[0].toUpperCase() + item.slice(1)
    })
    .join(" ")
  const title = `Launching Example ${fixedName}`
  const divider = "".padEnd(title.length + 4, padSymbol)

  console.log(divider)
  console.log(title)
  console.log(divider)
}

fs.readdir(__dirname, (err, files) => {
  const examples = files.filter(file => file.match(exampleMatcher))
  let [exampleName] = process.argv.slice(2)

  let filepath
  if (exampleName.match(exampleMatcher)) {
    filepath = path.resolve(__dirname, exampleName)
  } else {
    const name = examples.find(item => item.includes(exampleName))
    if (!name) {
      filepath = null
    } else {
      filepath = path.resolve(__dirname, name)
    }
  }

  if (filepath) {
    const title = filepath.match(/\d{1,3}-.*.js$/)[0]
    printTitle(title, "=")

    process.chdir("../")
    // eslint-disable-next-line jest/no-jest-import
    require("jest").run(`--runTestsByPath ${filepath}`)
  } else {
    console.log(`Example "${exampleName}" not found!\n`)
    console.log("Try one of available examples:", examples)
  }
})