test: Run node integration tests in isolation

Author: Luca Forstner

packages/node-integration-tests/package.json

@@ -17,7 +17,7 @@
     "fix:prettier": "prettier --write \"{suites,utils}/**/*.ts\"",
     "type-check": "tsc",
     "pretest": "run-s --silent prisma:init",
-    "test": "jest --forceExit",
+    "test": "ts-node ./utils/run-tests.ts",
     "test:watch": "yarn test --watch"
   },
   "dependencies": {

packages/node-integration-tests/utils/run-tests.ts

@@ -0,0 +1,61 @@
+/* eslint-disable no-console */
+import childProcess from 'child_process';
+import os from 'os';
+
+const testPaths = childProcess.execSync('jest --listTests', { encoding: 'utf8' }).trim().split('\n');
+
+let testsSucceeded = true;
+const testAmount = testPaths.length;
+const fails: string[] = [];
+
+const threads = os.cpus().map(async (_, i) => {
+  let testPath = testPaths.pop();
+  while (testPath !== undefined) {
+    console.log(`(Worker ${i}) Running test "${testPath}"`);
+    await new Promise(resolve => {
+      const p = childProcess.spawn('jest', ['--runTestsByPath', testPath as string, '--forceExit']);
+
+      let output = '';
+
+      p.stdout.on('data', (data: Buffer) => {
+        output = output + data.toString();
+      });
+
+      p.stderr.on('data', (data: Buffer) => {
+        output = output + data.toString();
+      });
+
+      p.on('error', error => {
+        console.log(`(Worker ${i}) Error in test "${testPath}"`, error);
+        console.log(output);
+        resolve();
+      });
+
+      p.on('exit', exitcode => {
+        console.log(`(Worker ${i}) Finished test "${testPath}"`);
+        console.log(output);
+        if (exitcode !== 0) {
+          fails.push(`FAILED: "${testPath}"`);
+          testsSucceeded = false;
+        }
+        resolve();
+      });
+    });
+    testPath = testPaths.pop();
+  }
+});
+
+void Promise.all(threads).then(() => {
+  console.log('-------------------');
+  console.log(`Successfully ran ${testAmount} tests.`);
+  if (!testsSucceeded) {
+    console.log('Not all tests succeeded:\n');
+    fails.forEach(fail => {
+      console.log(`● ${fail}`);
+    });
+    process.exit(1);
+  } else {
+    console.log('All testcases returned the expected results.');
+    process.exit(0);
+  }
+});