test: only refresh tmpDir for tests that need it

Expose `common.refreshTmpDir()` and only call it
for tests that use common.tmpDir or common.PIPE.

A positive side effect is the removal of a code
smell where child processes were detected by the
presence of `.send()`. Now each process can decide
for itself if it needs to refresh tmpDir.

PR-URL: https://github.com/nodejs/io.js/pull/1954
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>

1 files changed, 3 insertions, 0 deletions

diff --git a/test/parallel/test-fs-write-string-coerce.js b/test/parallel/test-fs-write-string-coerce.js
index 32f73172b7..1c43e719e4 100644
--- a/test/parallel/test-fs-write-string-coerce.js
+++ b/test/parallel/test-fs-write-string-coerce.js
@@ -4,6 +4,9 @@ var assert = require('assert');
 var path = require('path');
 var Buffer = require('buffer').Buffer;
 var fs = require('fs');
+
+common.refreshTmpDir();
+
 var fn = path.join(common.tmpDir, 'write-string-coerce.txt');
 var data = true;
 var expected = data + '';