Marcus Eide
140 lines
3.3 KiB
JavaScript
140 lines
3.3 KiB
JavaScript
/*
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* Copyright 2020 Spotify AB
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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const childProcess = require('child_process');
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const { spawn } = childProcess;
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const EXPECTED_LOAD_ERRORS = /ECONNREFUSED|ECONNRESET|did not get to load all resources/;
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function spawnPiped(cmd, options) {
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function pipeWithPrefix(stream, prefix = '') {
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return data => {
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const prefixedMsg = data
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.toString('utf8')
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.trimRight()
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.replace(/^/gm, prefix);
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stream.write(`${prefixedMsg}\n`, 'utf8');
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};
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}
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const child = spawn(cmd[0], cmd.slice(1), {
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stdio: 'pipe',
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shell: true,
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...options,
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});
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child.on('error', handleError);
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child.on('exit', code => {
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if (code) {
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print(`Child '${cmd.join(' ')}' exited with code ${code}`);
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process.exit(code);
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}
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});
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child.stdout.on(
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'data',
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pipeWithPrefix(process.stdout, `[${cmd.join(' ')}].out: `),
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);
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child.stderr.on(
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'data',
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pipeWithPrefix(process.stderr, `[${cmd.join(' ')}].err: `),
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);
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return child;
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}
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function handleError(err) {
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process.stdout.write(`${err.name}: ${err.stack || err.message}\n`);
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if (typeof err.code === 'number') {
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process.exit(err.code);
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} else {
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process.exit(1);
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}
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}
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function waitFor(fn) {
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return new Promise(resolve => {
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const handle = setInterval(() => {
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if (fn()) {
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clearInterval(handle);
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resolve();
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return;
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}
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}, 100);
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});
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}
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async function waitForExit(child) {
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if (child.exitCode !== null) {
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throw new Error(`Child already exited with code ${child.exitCode}`);
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}
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await new Promise((resolve, reject) =>
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child.once('exit', code => {
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if (code) {
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reject(new Error(`Child exited with code ${code}`));
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} else {
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print('Child finished');
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resolve();
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}
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}),
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);
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}
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async function waitForPageWithText(
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browser,
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path,
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text,
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{ intervalMs = 1000, maxAttempts = 240 } = {},
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) {
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let attempts = 0;
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for (;;) {
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try {
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await new Promise(resolve => setTimeout(resolve, intervalMs));
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await browser.visit(path);
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break;
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} catch (error) {
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if (error.message.match(EXPECTED_LOAD_ERRORS)) {
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attempts++;
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if (attempts > maxAttempts) {
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throw new Error(
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`Failed to load page '${path}', max number of attempts reached`,
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);
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}
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} else {
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throw error;
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}
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}
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}
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const escapedText = text.replace(/"/g, '\\"');
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browser.assert.evaluate(
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`Array.from(document.querySelectorAll("*")).some(el => el.textContent === "${escapedText}")`,
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true,
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`expected to find text ${text}`,
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);
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}
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function print(msg) {
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return process.stdout.write(`${msg}\n`);
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}
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module.exports = {
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spawnPiped,
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handleError,
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waitFor,
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waitForExit,
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waitForPageWithText,
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print,
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};
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