puppeteer/test/assert-coverage-test.js

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const {describe, it} = require('mocha');
const {getCoverageResults} = require('./coverage-utils');
const expect = require('expect');
describe('API coverage test', () => {
it('calls every method', () => {
if (!process.env.COVERAGE) return;
const coverageMap = getCoverageResults();
const missingMethods = [];
for (const method of coverageMap.keys()) {
if (!coverageMap.get(method))
missingMethods.push(method);
}
if (missingMethods.length) {
console.error('\nCoverage check failed: not all API methods called. See above output for list of missing methods.');
console.error(missingMethods.join('\n'));
}
// We know this will fail because we checked above
// but we need the actual test to fail.
expect(missingMethods.length).toEqual(0);
});
});