fixup! fixup! test: log more information in debugger tests

test/fixtures/snapshot/dns-localhost.js

@@ -0,0 +1,26 @@
+'use strict';
+const dns = require('dns');
+
+const {
+  setDeserializeMainFunction
+} = require('v8').startupSnapshot;
+
+function query() {
+  dns.resolve4('nodejs.org', (err, addresses) => {
+    if (err) throw error;
+
+    console.log(`addresses: ${JSON.stringify(addresses)}`);
+
+    addresses.forEach((a) => {
+      dns.reverse(a, (err, hostnames) => {
+        if (err) throw error;
+
+        console.log(`reverse for ${a}: ${JSON.stringify(hostnames)}`);
+      });
+    });
+  });
+}
+
+query();
+
+setDeserializeMainFunction(query);

test/internet/test-snapshot-dns.js

@@ -0,0 +1,49 @@
+'use strict';
+
+// This tests support for the dns module in snapshot.
+
+require('../common');
+const assert = require('assert');
+const { spawnSync } = require('child_process');
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+const path = require('path');
+const fs = require('fs');
+
+tmpdir.refresh();
+const blobPath = path.join(tmpdir.path, 'snapshot.blob');
+const entry = fixtures.path('snapshot', 'dns-local.js');
+{
+  const child = spawnSync(process.execPath, [
+    '--snapshot-blob',
+    blobPath,
+    '--build-snapshot',
+    entry,
+  ], {
+    cwd: tmpdir.path
+  });
+  if (child.status !== 0) {
+    console.log(child.stderr.toString());
+    console.log(child.stdout.toString());
+    assert.strictEqual(child.status, 0);
+  }
+  const stats = fs.statSync(path.join(tmpdir.path, 'snapshot.blob'));
+  assert(stats.isFile());
+}
+
+{
+  const child = spawnSync(process.execPath, [
+    '--snapshot-blob',
+    blobPath,
+  ], {
+    cwd: tmpdir.path,
+    env: {
+      ...process.env,
+    }
+  });
+
+  const stdout = child.stdout.toString().trim();
+  const file = fs.readFileSync(fixtures.path('x1024.txt'), 'utf8');
+  assert.strictEqual(stdout, file);
+  assert.strictEqual(child.status, 0);
+}

test/sequential/test-debugger-exec.js

@@ -8,8 +8,6 @@ const startCLI = require('../common/debugger');
 
 const assert = require('assert');
 
-process.env.NODE_DEBUG = 'inspect';
-
 {
 
   const cli = startCLI([fixtures.path('debugger/alive.js')]);