mergedCoverage.js

/*
 * Copyright 2021 Harness Inc. All rights reserved.
 * Use of this source code is governed by the PolyForm Shield 1.0.0 license
 * that can be found in the licenses directory at the root of this repository, also available at
 * https://polyformproject.org/wp-content/uploads/2020/06/PolyForm-Shield-1.0.0.txt.
 */

/**
 * This script merges the coverage reports from Cypress and Jest into a single one,
 * inside the "merged-coverage" folder
 */
const { execSync } = require('child_process')
const fs = require('fs-extra')
const REPORTS_FOLDER = 'reports'
const FINAL_OUTPUT_FOLDER = 'merged-coverage'
const run = commands => {
  commands.forEach(command => execSync(command, { stdio: 'inherit' }))
}
// Create the reports folder and move the reports from cypress and jest inside it
fs.emptyDirSync(REPORTS_FOLDER)
fs.copyFileSync('cypress-coverage/coverage-final.json', `${REPORTS_FOLDER}/from-cypress.json`)
fs.copyFileSync('coverage/coverage-final.json', `${REPORTS_FOLDER}/from-jest.json`)
fs.emptyDirSync(FINAL_OUTPUT_FOLDER)
// Run "nyc merge" inside the reports folder, merging the two coverage files into one,
// then generate the final report on the coverage folder
run([
  // "nyc merge" will create a "coverage.json" file on the FINAL_OUTPUT_FOLDER
  `nyc merge ${REPORTS_FOLDER} ${FINAL_OUTPUT_FOLDER}/merged-coverage.json`,
  `nyc report -t ${FINAL_OUTPUT_FOLDER} --reporter html --reporter json-summary --report-dir ${FINAL_OUTPUT_FOLDER}`
])