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Detox/E2E: Add custom test sequencer (#6611)

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* Detox/E2E: Add custom test sequencer

* Fix lint

* Added explicit dev dependency on sequencer
This commit is contained in:
Joseph Baylon 2022-09-01 07:56:31 -07:00 committed by GitHub
parent e0828d6a74
commit fab4c1a216
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 34 additions and 0 deletions
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1
detox/e2e/config.js
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@ -8,6 +8,7 @@ module.exports = {
maxWorkers: 1,
testEnvironment: './environment',
testRunner: 'jest-circus/runner',
testSequencer: './custom_sequencer.js',
testTimeout: 120000,
testRegex: '\\.e2e\\.ts$',
transform: {

31
detox/e2e/custom_sequencer.js Normal file
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@ -0,0 +1,31 @@
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
const Sequencer = require('@jest/test-sequencer').default;
class CustomSequencer extends Sequencer {
/**
* Select tests for shard requested via --shard=shardIndex/shardCount
* Sharding is applied before sorting
*/
shard(tests, {shardIndex, shardCount}) {
const shardSize = Math.ceil(tests.length / shardCount);
const shardStart = shardSize * (shardIndex - 1);
const shardEnd = shardSize * shardIndex;
return [...tests].sort((a, b) => (a.path > b.path ? 1 : -1)).slice(shardStart, shardEnd);
}
/**
* Sort test to determine order of execution
* Sorting is applied after sharding
*/
sort(tests) {
// Test structure information
// https://github.com/facebook/jest/blob/6b8b1404a1d9254e7d5d90a8934087a9c9899dab/packages/jest-runner/src/types.ts#L17-L21
const copyTests = Array.from(tests);
return copyTests.sort((testA, testB) => (testA.path > testB.path ? 1 : -1));
}
}
module.exports = CustomSequencer;

1
detox/package-lock.json generated
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@ -10,6 +10,7 @@
"@babel/plugin-transform-modules-commonjs": "7.18.6",
"@babel/plugin-transform-runtime": "7.18.10",
"@babel/preset-env": "7.18.10",
"@jest/test-sequencer": "28.1.3",
"@types/jest": "28.1.6",
"@types/tough-cookie": "4.0.2",
"@types/uuid": "8.3.4",

1
detox/package.json
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@ -8,6 +8,7 @@
"@babel/plugin-transform-modules-commonjs": "7.18.6",
"@babel/plugin-transform-runtime": "7.18.10",
"@babel/preset-env": "7.18.10",
"@jest/test-sequencer": "28.1.3",
"@types/jest": "28.1.6",
"@types/tough-cookie": "4.0.2",
"@types/uuid": "8.3.4",