timers: make Timer.close idempotent

fixes #1287

PR-URL: https://github.com/iojs/io.js/pull/1288
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

1 files changed, 14 insertions, 0 deletions

diff --git a/test/parallel/test-timer-close.js b/test/parallel/test-timer-close.js
new file mode 100644
index 0000000000..b374fe162c
--- /dev/null
+++ b/test/parallel/test-timer-close.js
@@ -0,0 +1,14 @@
+var assert = require('assert');
+
+var t = new (process.binding('timer_wrap').Timer);
+var called = 0;
+function onclose() {
+  called++;
+}
+
+t.close(onclose);
+t.close(onclose);
+
+process.on('exit', function() {
+  assert.equal(1, called);
+});