debian-mirror-gitlab/scripts/frontend/parallel_ci_sequencer.js

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const Sequencer = require('@jest/test-sequencer').default;
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const sortByPath = (test1, test2) => {
if (test1.path < test2.path) {
return -1;
}
if (test1.path > test2.path) {
return 1;
}
return 0;
};
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class ParallelCISequencer extends Sequencer {
constructor() {
super();
this.ciNodeIndex = Number(process.env.CI_NODE_INDEX || '1');
this.ciNodeTotal = Number(process.env.CI_NODE_TOTAL || '1');
}
sort(tests) {
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const sortedTests = [...tests].sort(sortByPath);
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const testsForThisRunner = this.distributeAcrossCINodes(sortedTests);
console.log(`CI_NODE_INDEX: ${this.ciNodeIndex}`);
console.log(`CI_NODE_TOTAL: ${this.ciNodeTotal}`);
console.log(`Total number of tests: ${tests.length}`);
console.log(`Total number of tests for this runner: ${testsForThisRunner.length}`);
return testsForThisRunner;
}
distributeAcrossCINodes(tests) {
return tests.filter((test, index) => {
return index % this.ciNodeTotal === this.ciNodeIndex - 1;
});
}
}
module.exports = ParallelCISequencer;