test: add msg validation to test-buffer-compare

PR-URL: nodejs#10807
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-buffer-compare.js

@@ -28,8 +28,11 @@ assert.strictEqual(Buffer.compare(Buffer.alloc(0), Buffer.alloc(0)), 0);
 assert.strictEqual(Buffer.compare(Buffer.alloc(0), Buffer.alloc(1)), -1);
 assert.strictEqual(Buffer.compare(Buffer.alloc(1), Buffer.alloc(0)), 1);
 
-assert.throws(() => Buffer.compare(Buffer.alloc(1), 'abc'));
+assert.throws(() => Buffer.compare(Buffer.alloc(1), 'abc'),
+              /^TypeError: Arguments must be Buffers or Uint8Arrays$/);
 
-assert.throws(() => Buffer.compare('abc', Buffer.alloc(1)));
+assert.throws(() => Buffer.compare('abc', Buffer.alloc(1)),
+              /^TypeError: Arguments must be Buffers or Uint8Arrays$/);
 
-assert.throws(() => Buffer.alloc(1).compare('abc'));
+assert.throws(() => Buffer.alloc(1).compare('abc'),
+              /^TypeError: Argument must be a Buffer or Uint8Array$/);