test: refactor all tests that depends on crypto

we had a few ways versions of looking for support before executing a test. this
commit unifies them as well as add the check for all tests that previously
lacked them. found by running `./configure --without-ssl && make test`. also,
produce tap skip output if the test is skipped.

PR-URL: https://github.com/iojs/io.js/pull/1049
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Shigeki Ohtsu <ohtsu@iij.ad.jp>

1 files changed, 4 insertions, 0 deletions

diff --git a/test/pummel/test-dh-regr.js b/test/pummel/test-dh-regr.js
index 5f4534c365..5c40173b12 100644
--- a/test/pummel/test-dh-regr.js
+++ b/test/pummel/test-dh-regr.js
@@ -1,6 +1,10 @@
 var common = require('../common');
 var assert = require('assert');
 
+if (!common.hasCrypto) {
+  console.log('1..0 # Skipped: missing crypto');
+  process.exit();
+}
 var crypto = require('crypto');
 
 var p = crypto.createDiffieHellman(256).getPrime();