test: improve test coverage in child_process

PR-URL: #26282
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/test-child-process-validate-stdio.js

@@ -5,14 +5,13 @@ const common = require('../common');
 const assert = require('assert');
 const getValidStdio = require('internal/child_process').getValidStdio;
 
-const expectedError =
-  common.expectsError({ code: 'ERR_INVALID_OPT_VALUE', type: TypeError }, 2);
+const expectedError = { code: 'ERR_INVALID_OPT_VALUE', type: TypeError };
 
 // Should throw if string and not ignore, pipe, or inherit
-assert.throws(() => getValidStdio('foo'), expectedError);
+common.expectsError(() => getValidStdio('foo'), expectedError);
 
 // Should throw if not a string or array
-assert.throws(() => getValidStdio(600), expectedError);
+common.expectsError(() => getValidStdio(600), expectedError);
 
 // Should populate stdio with undefined if len < 3
 {
@@ -30,6 +29,19 @@ common.expectsError(() => getValidStdio(stdio2, true),
                     { code: 'ERR_IPC_SYNC_FORK', type: Error }
 );
 
+// Should throw if stdio is not a valid input
+{
+  const stdio = ['foo'];
+  common.expectsError(() => getValidStdio(stdio, false),
+                      { code: 'ERR_INVALID_SYNC_FORK_INPUT', type: TypeError }
+  );
+}
+
+// Should throw if stdio is not a valid option
+{
+  const stdio = [{ foo: 'bar' }];
+  common.expectsError(() => getValidStdio(stdio), expectedError);
+}
 
 if (common.isMainThread) {
   const stdio3 = [process.stdin, process.stdout, process.stderr];