test: change promises to async/await

test/sequential/test-debugger-launch.mjs

@@ -0,0 +1,35 @@
+import { skipIfInspectorDisabled } from '../common/index.mjs';
+skipIfInspectorDisabled();
+
+import { path } from '../common/fixtures.mjs';
+import startCLI from '../common/debugger.js';
+
+import assert from 'assert';
+const script = path('debugger', 'three-lines.js');
+const cli = startCLI([script]);
+try {
+  await cli.waitForInitialBreak();
+  await cli.waitForPrompt();
+  assert.match(cli.output, /debug>/, 'prints a prompt');
+  assert.match(
+    cli.output,
+    /< Debugger listening on [^\n]*9229/,
+    'forwards child output'
+  );
+  await cli.command('["hello", "world"].join(" ")');
+  assert.match(cli.output, /hello world/, 'prints the result');
+  await cli.command('');
+  assert.match(
+    cli.output,
+    /hello world/,
+    'repeats the last command on <enter>'
+  );
+  await cli.command('version');
+  assert.ok(
+    cli.output.includes(process.versions.v8),
+    'version prints the v8 version'
+  );
+} finally {
+  const code = await cli.quit();
+  assert.strictEqual(code, 0);
+}