[tests] Run unit tests concurrently in chunks (#9615)

We can separate each package `test-unit` into a separate job. This will help isolate problems and we can re-run CI for a specific package.

packages/node/test/integration-setup.js

@@ -1,6 +1,6 @@
 const fs = require('fs');
 const path = require('path');
-const { intoChunks, NUMBER_OF_CHUNKS } = require('../../../utils/chunk-tests');
+const { intoChunks } = require('../../../utils/chunk-tests');
 
 const {
   testDeployment,
@@ -20,7 +20,7 @@ module.exports = function setupTests(groupIndex) {
   let fixtures = fs.readdirSync(fixturesPath);
 
   if (typeof groupIndex !== 'undefined') {
-    fixtures = intoChunks(NUMBER_OF_CHUNKS, fixtures)[groupIndex - 1];
+    fixtures = intoChunks(1, 5, fixtures)[groupIndex - 1];
 
     console.log('testing group', groupIndex, fixtures);
   }

packages/static-build/test/integration-setup.js

@@ -1,6 +1,6 @@
 const fs = require('fs');
 const path = require('path');
-const { intoChunks, NUMBER_OF_CHUNKS } = require('../../../utils/chunk-tests');
+const { intoChunks } = require('../../../utils/chunk-tests');
 
 const {
   testDeployment,
@@ -33,7 +33,7 @@ module.exports = function setupTests(groupIndex) {
   let fixtures = fs.readdirSync(fixturesPath);
 
   if (typeof groupIndex !== 'undefined') {
-    fixtures = intoChunks(NUMBER_OF_CHUNKS, fixtures)[groupIndex - 1];
+    fixtures = intoChunks(1, 5, fixtures)[groupIndex - 1];
 
     console.log('testing group', groupIndex, fixtures);
   }

utils/chunk-tests.js

@@ -1,12 +1,19 @@
+// @ts-check
 const child_process = require('child_process');
 const path = require('path');
 
-const NUMBER_OF_CHUNKS = 5;
-const MINIMUM_PER_CHUNK = 1;
 const runnersMap = new Map([
-  ['test-e2e', ['ubuntu-latest']],
-  ['test-next-local', ['ubuntu-latest']],
-  ['test-dev', ['ubuntu-latest', 'macos-latest']],
+  [
+    'test-unit',
+    {
+      min: 1,
+      max: 1,
+      runners: ['ubuntu-latest', 'macos-latest', 'windows-latest'],
+    },
+  ],
+  ['test-e2e', { min: 1, max: 5, runners: ['ubuntu-latest'] }],
+  ['test-next-local', { min: 1, max: 5, runners: ['ubuntu-latest'] }],
+  ['test-dev', { min: 1, max: 5, runners: ['ubuntu-latest', 'macos-latest'] }],
 ]);
 
 async function getChunkedTests() {
@@ -60,11 +67,14 @@ async function getChunkedTests() {
     ([packagePathAndName, scriptNames]) => {
       const [packagePath, packageName] = packagePathAndName.split(',');
       return Object.entries(scriptNames).flatMap(([scriptName, testPaths]) => {
+        const {
+          runners = ['ubuntu-latest'],
+          min = 1,
+          max = 1,
+        } = runnersMap.get(scriptName) || {};
         const sortedTestPaths = testPaths.sort((a, b) => a.localeCompare(b));
-        return intoChunks(NUMBER_OF_CHUNKS, sortedTestPaths).flatMap(
+        return intoChunks(min, max, sortedTestPaths).flatMap(
           (chunk, chunkNumber, allChunks) => {
-            const runners = runnersMap.get(scriptName) || ['ubuntu-latest'];
-
             return runners.map(runner => {
               return {
                 runner,
@@ -115,7 +125,7 @@ async function turbo(args) {
         if (code !== 0) {
           reject(new Error(`Turbo exited with code ${code}`));
         } else {
-          resolve();
+          resolve(code);
         }
       });
     });
@@ -128,17 +138,15 @@ async function turbo(args) {
 
 /**
  * @template T
- * @param {number} totalChunks maximum number of chunks
- * @param {T[]} values
+ * @param {number} minChunks minimum number of chunks
+ * @param {number} maxChunks maximum number of chunks
+ * @param {T[]} arr
  * @returns {T[][]}
  */
-function intoChunks(totalChunks, arr) {
-  const chunkSize = Math.max(
-    MINIMUM_PER_CHUNK,
-    Math.ceil(arr.length / totalChunks)
-  );
+function intoChunks(minChunks, maxChunks, arr) {
+  const chunkSize = Math.max(minChunks, Math.ceil(arr.length / maxChunks));
   const chunks = [];
-  for (let i = 0; i < totalChunks; i++) {
+  for (let i = 0; i < maxChunks; i++) {
     chunks.push(arr.slice(i * chunkSize, (i + 1) * chunkSize));
   }
   return chunks.filter(x => x.length > 0);
@@ -161,5 +169,4 @@ if (module === require.main || !module.parent) {
 
 module.exports = {
   intoChunks,
-  NUMBER_OF_CHUNKS,
 };

utils/chunk-tests.test.js

@@ -3,16 +3,27 @@ const { intoChunks } = require('./chunk-tests');
 describe('it should create chunks correctly', () => {
   it('should split chunks correctly less chunks than items', () => {
     const files = ['/first', '/second', '/third'];
-    expect(intoChunks(2, files)).toEqual([['/first', '/second'], ['/third']]);
+    expect(intoChunks(1, 2, files)).toEqual([
+      ['/first', '/second'],
+      ['/third'],
+    ]);
   });
 
   it('should split chunks correctly more chunks than items', () => {
     const files = ['/first', '/second', '/third'];
-    expect(intoChunks(5, files)).toEqual([['/first'], ['/second'], ['/third']]);
+    expect(intoChunks(1, 5, files)).toEqual([
+      ['/first'],
+      ['/second'],
+      ['/third'],
+    ]);
   });
 
   it('should split chunks correctly equal chunks with items', () => {
     const files = ['/first', '/second', '/third'];
-    expect(intoChunks(3, files)).toEqual([['/first'], ['/second'], ['/third']]);
+    expect(intoChunks(1, 3, files)).toEqual([
+      ['/first'],
+      ['/second'],
+      ['/third'],
+    ]);
   });
 });