test: split report OOM tests

On some machines the report OOM tests can take too long to complete,
resulting in a timeout. This splits the test into several different
smaller tests to reduce the flakiness of it.

PR-URL: nodejs/node#44389
Refs: nodejs/reliability#356
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/fixtures/report-oom.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const list = [];
+while (true) {
+  const record = new MyRecord();
+  list.push(record);
+}
+
+function MyRecord() {
+  this.name = 'foo';
+  this.id = 128;
+  this.account = 98454324;
+}

test/report/test-report-fatalerror-oomerror-compact.js

@@ -0,0 +1,35 @@
+'use strict';
+
+// Testcases for situations involving fatal errors, like Javascript heap OOM
+
+require('../common');
+const assert = require('assert');
+const fs = require('fs');
+const helper = require('../common/report.js');
+const spawnSync = require('child_process').spawnSync;
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+
+// Common args that will cause an out-of-memory error for child process.
+const ARGS = [
+  '--max-old-space-size=20',
+  fixtures.path('report-oom'),
+];
+
+{
+  // Verify that --report-compact is respected when set.
+  tmpdir.refresh();
+  const args = ['--report-on-fatalerror', '--report-compact', ...ARGS];
+  const child = spawnSync(process.execPath, args, { cwd: tmpdir.path });
+  assert.notStrictEqual(child.status, 0, 'Process exited unexpectedly');
+
+  const reports = helper.findReports(child.pid, tmpdir.path);
+  assert.strictEqual(reports.length, 1);
+
+  const report = reports[0];
+  helper.validate(report);
+  assert.strictEqual(require(report).header.threadId, null);
+  // Subtract 1 because "xx\n".split("\n") => [ 'xx', '' ].
+  const lines = fs.readFileSync(report, 'utf8').split('\n').length - 1;
+  assert.strictEqual(lines, 1);
+}

test/report/test-report-fatalerror-oomerror-directory.js

@@ -0,0 +1,36 @@
+'use strict';
+
+// Testcases for situations involving fatal errors, like Javascript heap OOM
+
+require('../common');
+const assert = require('assert');
+const fs = require('fs');
+const helper = require('../common/report.js');
+const spawnSync = require('child_process').spawnSync;
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+
+// Common args that will cause an out-of-memory error for child process.
+const ARGS = [
+  '--max-old-space-size=20',
+  fixtures.path('report-oom'),
+];
+
+{
+  // Verify that --report-directory is respected when set.
+  // Verify that --report-compact is respected when not set.
+  tmpdir.refresh();
+  const dir = '--report-directory=' + tmpdir.path;
+  const args = ['--report-on-fatalerror', dir, ...ARGS];
+  const child = spawnSync(process.execPath, args, { });
+  assert.notStrictEqual(child.status, 0, 'Process exited unexpectedly');
+
+  const reports = helper.findReports(child.pid, tmpdir.path);
+  assert.strictEqual(reports.length, 1);
+
+  const report = reports[0];
+  helper.validate(report);
+  assert.strictEqual(require(report).header.threadId, null);
+  const lines = fs.readFileSync(report, 'utf8').split('\n').length - 1;
+  assert(lines > 10);
+}

test/report/test-report-fatalerror-oomerror-filename.js

@@ -0,0 +1,40 @@
+'use strict';
+
+// Testcases for situations involving fatal errors, like Javascript heap OOM
+
+require('../common');
+const assert = require('assert');
+const helper = require('../common/report.js');
+const spawnSync = require('child_process').spawnSync;
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+
+// Common args that will cause an out-of-memory error for child process.
+const ARGS = [
+  '--max-old-space-size=20',
+  fixtures.path('report-oom'),
+];
+
+{
+  // Verify that --report-compact is respected when set.
+  // Verify that --report-filename is respected when set.
+  tmpdir.refresh();
+  const args = [
+    '--report-on-fatalerror',
+    '--report-compact',
+    '--report-filename=stderr',
+    ...ARGS,
+  ];
+  const child = spawnSync(process.execPath, args, { encoding: 'utf8' });
+  assert.notStrictEqual(child.status, 0, 'Process exited unexpectedly');
+
+  const reports = helper.findReports(child.pid, tmpdir.path);
+  assert.strictEqual(reports.length, 0);
+
+  const lines = child.stderr.split('\n');
+  // Skip over unavoidable free-form output and gc log from V8.
+  const report = lines.find((i) => i.startsWith('{'));
+  const json = JSON.parse(report);
+
+  assert.strictEqual(json.header.threadId, null);
+}

test/report/test-report-fatalerror-oomerror-not-set.js

@@ -0,0 +1,26 @@
+'use strict';
+
+// Testcases for situations involving fatal errors, like Javascript heap OOM
+
+require('../common');
+const assert = require('assert');
+const helper = require('../common/report.js');
+const spawnSync = require('child_process').spawnSync;
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+
+// Common args that will cause an out-of-memory error for child process.
+const ARGS = [
+  '--max-old-space-size=20',
+  fixtures.path('report-oom'),
+];
+
+{
+  tmpdir.refresh();
+  // Verify that --report-on-fatalerror is respected when not set.
+  const args = ARGS;
+  const child = spawnSync(process.execPath, args, { cwd: tmpdir.path });
+  assert.notStrictEqual(child.status, 0, 'Process exited unexpectedly');
+  const reports = helper.findReports(child.pid, tmpdir.path);
+  assert.strictEqual(reports.length, 0);
+}

test/report/test-report-fatalerror-oomerror-set.js

@@ -0,0 +1,37 @@
+'use strict';
+
+// Testcases for situations involving fatal errors, like Javascript heap OOM
+
+require('../common');
+const assert = require('assert');
+const helper = require('../common/report.js');
+const spawnSync = require('child_process').spawnSync;
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+
+// Common args that will cause an out-of-memory error for child process.
+const ARGS = [
+  '--max-old-space-size=20',
+  fixtures.path('report-oom'),
+];
+
+{
+  // Verify that --report-on-fatalerror is respected when set.
+  tmpdir.refresh();
+  const args = ['--report-on-fatalerror', ...ARGS];
+  const child = spawnSync(process.execPath, args, { cwd: tmpdir.path });
+  assert.notStrictEqual(child.status, 0, 'Process exited unexpectedly');
+
+  const reports = helper.findReports(child.pid, tmpdir.path);
+  assert.strictEqual(reports.length, 1);
+
+  const report = reports[0];
+  helper.validate(report);
+
+  const content = require(report);
+  // Errors occur in a context where env is not available, so thread ID is
+  // unknown. Assert this, to verify that the underlying env-less situation is
+  // actually reached.
+  assert.strictEqual(content.header.threadId, null);
+  assert.strictEqual(content.header.trigger, 'OOMError');
+}