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karma.conf.cjs
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/* eslint-disable @typescript-eslint/no-var-requires */
const istanbul = require('rollup-plugin-istanbul')
const json = require('@rollup/plugin-json')
const resolve = require('@rollup/plugin-node-resolve')
const yargs = require('yargs')
const env = process.env.NODE_ENV
module.exports = async function (karma) {
const builds = (await import('./rollup.config.js')).default
const args = yargs.option('verbose', { default: false }).argv
// Use the same rollup config as our dist files: when debugging (--watch),
// we will prefer the unminified build which is easier to browse and works
// better with source mapping. In other cases, pick the minified build to
// make sure that the minification process (terser) doesn't break anything.
const regex = karma.autoWatch ? /\.js$/ : /\.min\.js$/
const build = builds.filter((v) => v.output.format === 'umd' && v.output.file.match(regex))[0]
if (env === 'test') {
build.plugins.push(istanbul({ exclude: ['node_modules/**/*.js', 'package.json'] }))
}
karma.set({
frameworks: ['jasmine'],
reporters: ['spec', 'kjhtml'],
browsers: (args.browsers || 'chrome,firefox').split(','),
logLevel: karma.LOG_INFO,
client: {
jasmine: {
stopOnSpecFailure: !!karma.autoWatch,
timeoutInterval: 10000,
},
},
// Explicitly disable hardware acceleration to make image
// diff more stable when ran on Travis and dev machine.
// https://github.com/chartjs/Chart.js/pull/5629
// Since FF 110 https://github.com/chartjs/Chart.js/issues/11164
customLaunchers: {
chrome: {
base: 'Chrome',
flags: ['--disable-accelerated-2d-canvas'],
},
firefox: {
base: 'Firefox',
prefs: {
'layers.acceleration.disabled': true,
'gfx.canvas.accelerated': false,
},
},
},
files: [
{ pattern: 'test/fixtures/**/*.js', included: false },
{ pattern: 'test/fixtures/**/*.png', included: false },
{ pattern: 'node_modules/chart.js/dist/chart.umd.js' },
{ pattern: 'node_modules/hammer-simulator/index.js' },
{ pattern: 'node_modules/hammerjs/hammer.js' },
{ pattern: 'node_modules/chartjs-adapter-date-fns/dist/chartjs-adapter-date-fns.bundle.js' },
{ pattern: 'test/index.js' },
{ pattern: 'src/index.umd.ts' },
{ pattern: 'test/specs/**/*.js' },
],
preprocessors: {
'test/index.js': ['rollup'],
'src/index.umd.ts': ['sources'],
},
rollupPreprocessor: {
plugins: [json(), resolve({ extensions: ['.js', '.ts'] })],
external: ['chart.js'],
output: {
name: 'test',
format: 'umd',
globals: {
'chart.js': 'Chart',
},
},
},
customPreprocessors: {
fixtures: {
base: 'rollup',
options: {
output: {
format: 'iife',
name: 'fixture',
},
},
},
sources: {
base: 'rollup',
options: build,
},
},
// These settings deal with browser disconnects. We had seen test flakiness from Firefox
// [Firefox 56.0.0 (Linux 0.0.0)]: Disconnected (1 times), because no message in 10000 ms.
// https://github.com/jasmine/jasmine/issues/1327#issuecomment-332939551
browserDisconnectTolerance: 3,
})
if (env === 'test') {
karma.reporters.push('coverage')
karma.coverageReporter = {
dir: 'coverage/',
reporters: [
{ type: 'html', subdir: 'html' },
{ type: 'lcovonly', subdir: (browser) => browser.toLowerCase().split(/[ /-]/)[0] },
],
}
}
}