test: expand coverage for crypto

crypto.Hash
- Call constructor without new keyword

crypto.Hmac
- Call constructor without new keyword
- Call constructor with typeof hmac != string
- Call constructor with typeof hmac = string, typeof key != string

PR-URL: https://github.com/nodejs/node/pull/17447
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/test/parallel/test-crypto-hmac.js b/test/parallel/test-crypto-hmac.js
index 8b9473704d..6c2102fe23 100644
--- a/test/parallel/test-crypto-hmac.js
+++ b/test/parallel/test-crypto-hmac.js
@@ -7,6 +7,30 @@ const assert = require('assert');
 const crypto = require('crypto');
 
 {
+  const Hmac = crypto.Hmac;
+  const instance = crypto.Hmac('sha256', 'Node');
+  assert(instance instanceof Hmac, 'Hmac is expected to return a new instance' +
+                                   ' when called without `new`');
+}
+
+common.expectsError(
+  () => crypto.createHmac(null),
+  {
+    code: 'ERR_INVALID_ARG_TYPE',
+    type: TypeError,
+    message: 'The "hmac" argument must be of type string'
+  });
+
+common.expectsError(
+  () => crypto.createHmac('sha1', null),
+  {
+    code: 'ERR_INVALID_ARG_TYPE',
+    type: TypeError,
+    message: 'The "key" argument must be one of type string, TypedArray, or ' +
+             'DataView'
+  });
+
+{
   // Test HMAC
   const actual = crypto.createHmac('sha1', 'Node')
     .update('some data')