Add test sequencer

Author: fabioh8010

jest-sequencer.js

@@ -0,0 +1,18 @@
+const Sequencer = require('@jest/test-sequencer').default;
+
+class TestSequencer extends Sequencer {
+    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(tests) {
+        const copyTests = [...tests];
+        return copyTests.sort((testA, testB) => (testA.path > testB.path ? 1 : -1));
+    }
+}
+
+module.exports = TestSequencer;

jest.config.js

@@ -14,4 +14,5 @@ module.exports = {
     setupFilesAfterEnv: ['./jestSetup.js'],
     testTimeout: 60000,
     transformIgnorePatterns: ['node_modules/(?!((@)?react-native|@ngneat/falso|uuid)/)'],
+    testSequencer: './jest-sequencer.js',
 };