@zappar/jest-console-logs
v1.1.1
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Capture and test console logs using jest/puppeteer
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jest-console-logs
This library contains some handy console functions which aid jest-puppeteer tests.
You can find some examples in action over at https://github.com/zappar-xr/jest-console-logs/tree/master/tests
Table Of Contents
Starting Development
You can use this library by installing from NPM for use in a jest-puppeteer project.
NPM
Run the following NPM command inside your project directory:
npm install --save-dev @zappar/jest-console-logs
Then import the library into your tests:
import * as util from '@zappar/jest-console-logs';
Usage
Expecting Console Logs (Sequential)
util.expectSequential
resolves once provided logs are detected before the timeout. You may provide a set of logs to be ignored.
it('expectConsoleLogs', async () => {
const page = await browser.newPage();
page.goto(url);
await util.expectSequential(
{
expected: [
'log 1',
'log 2',
'log 3',
],
page,
timeoutMs: 30000,
ignore: new Set([
'[HMR] Waiting for update signal from WDS...',
'[WDS] Hot Module Replacement enabled.',
'[WDS] Live Reloading enabled.',
]),
},
);
await new Promise((resolve) => setTimeout(resolve, 1000));
await page.close();
});
Expecting Console Logs (Unordered)
util.expectLogs
resolves once provided logs are detected before the timeout.
it('expectUnorderedLogs', async () => {
const page = await browser.newPage();
page.goto(url);
await util.expectLogs({
expected: [
'log 1',
'log 3',
'log 2',
],
timeoutMs: 1000,
page,
});
});
Catching errors:
it('expectUnorderedLogsErrors', async () => {
const page = await browser.newPage();
page.goto(url);
try {
await util.expectLogs({
expected: [
'log 1',
'log 35',
'log 2',
],
timeoutMs: 1000,
page,
});
} catch (e) {
expect(e.message).toEqual('Could not find expected console logs: log 35');
}
});
Waiting for console logs
util.waitForConsoleLog
takes a log to wait for, the page and a timeout.
it('waitForConsoleLog', async () => {
const page = await browser.newPage();
page.goto(url);
await util.waitForConsoleLog('log 5', page, 10000);
});