test: improve crypto.setEngine coverage to check for errors

PR-URL: #11143
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-crypto-engine.js

@@ -0,0 +1,18 @@
+'use strict';
+const common = require('../common');
+
+if (!common.hasCrypto) {
+  common.skip('missing crypto');
+  return;
+}
+
+const assert = require('assert');
+const crypto = require('crypto');
+
+assert.throws(function() {
+  crypto.setEngine(true);
+}, /^TypeError: "id" argument should be a string$/);
+
+assert.throws(function() {
+  crypto.setEngine('/path/to/engine', 'notANumber');
+}, /^TypeError: "flags" argument should be a number, if present$/);