Ci server custom jest reporter (#20765)

# Introduction
Only display failing unit tests trace in the ci-server server-test jobs
So it's possible to identify what unit test are failing without having
to re run them locally

packages/twenty-server/jest-failures-only-reporter.js

@@ -0,0 +1,88 @@
+class JestFailuresOnlyReporter {
+  constructor() {
+    this._failures = [];
+  }
+
+  onTestResult(_test, testResult) {
+    if (testResult.numFailingTests === 0 && !testResult.testExecError) {
+      return;
+    }
+
+    const relativePath = testResult.testFilePath.replace(
+      process.cwd() + '/',
+      '',
+    );
+
+    process.stderr.write(`\n\x1b[31mFAIL\x1b[0m ${relativePath}\n`);
+
+    if (testResult.failureMessage) {
+      process.stderr.write(testResult.failureMessage + '\n');
+    }
+
+    if (testResult.testExecError) {
+      process.stderr.write(
+        `\n  Runtime error: ${testResult.testExecError.message}\n`,
+      );
+    }
+
+    this._failures.push({ path: relativePath, testResult });
+  }
+
+  onRunComplete(_testContexts, aggregatedResults) {
+    const {
+      numPassedTestSuites,
+      numFailedTestSuites,
+      numTotalTestSuites,
+      numPassedTests,
+      numFailedTests,
+      numTotalTests,
+    } = aggregatedResults;
+
+    process.stderr.write('\n');
+
+    if (this._failures.length > 0) {
+      process.stderr.write(
+        `\x1b[31m${'='.repeat(60)}\x1b[0m\n` +
+          `\x1b[31m FAILED TEST SUITES SUMMARY\x1b[0m\n` +
+          `\x1b[31m${'='.repeat(60)}\x1b[0m\n\n`,
+      );
+
+      for (const failure of this._failures) {
+        process.stderr.write(`  \x1b[31m✕\x1b[0m ${failure.path}\n`);
+
+        const failedTests = failure.testResult.testResults.filter(
+          (result) => result.status === 'failed',
+        );
+
+        for (const failedTest of failedTests) {
+          process.stderr.write(`    \x1b[31m→\x1b[0m ${failedTest.fullName}\n`);
+        }
+
+        process.stderr.write('\n');
+      }
+
+      process.stderr.write(`\x1b[31m${'='.repeat(60)}\x1b[0m\n\n`);
+    }
+
+    const suiteSummary =
+      `Test Suites: ` +
+      (numFailedTestSuites > 0
+        ? `\x1b[31m${numFailedTestSuites} failed\x1b[0m, `
+        : '') +
+      (numPassedTestSuites > 0
+        ? `\x1b[32m${numPassedTestSuites} passed\x1b[0m, `
+        : '') +
+      `${numTotalTestSuites} total`;
+
+    const testSummary =
+      `Tests:       ` +
+      (numFailedTests > 0 ? `\x1b[31m${numFailedTests} failed\x1b[0m, ` : '') +
+      (numPassedTests > 0 ? `\x1b[32m${numPassedTests} passed\x1b[0m, ` : '') +
+      `${numTotalTests} total`;
+
+    process.stderr.write(suiteSummary + '\n');
+    process.stderr.write(testSummary + '\n');
+  }
+}
+
+module.exports = JestFailuresOnlyReporter;

packages/twenty-server/jest.config.mjs

@@ -1,12 +1,15 @@
 import { createRequire } from 'module';
 const require = createRequire(import.meta.url);
 
+const isCI = process.env.CI === 'true';
+
 const jestConfig = {
   // For more information please have a look to official docs https://jestjs.io/docs/configuration/#prettierpath-string
   // Prettier v3 should be supported in jest v30 https://github.com/jestjs/jest/releases/tag/v30.0.0-alpha.1
   prettierPath: null,
   // to enable logs, comment out the following line
   silent: true,
+  ...(isCI && { reporters: ['./jest-failures-only-reporter.js'] }),
   errorOnDeprecated: true,
   clearMocks: true,
   displayName: 'twenty-server',