From 16134060dea378618b7fa4f2accd6cd4831541f0 Mon Sep 17 00:00:00 2001
From: Shawn Smith <shawn.p.smith@gmail.com>
Date: Mon, 6 Jan 2014 10:32:07 -0800
Subject: [PATCH] time: add tests for Tick, NewTicker with negative duration

R=golang-codereviews, gobot, r, bradfitz
CC=golang-codereviews
https://golang.org/cl/37660044
---
 src/pkg/time/tick_test.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/pkg/time/tick_test.go b/src/pkg/time/tick_test.go
index d8a086ceb2..32f4740ad9 100644
--- a/src/pkg/time/tick_test.go
+++ b/src/pkg/time/tick_test.go
@@ -48,6 +48,24 @@ func TestTeardown(t *testing.T) {
 	}
 }
 
+// Test the Tick convenience wrapper.
+func TestTick(t *testing.T) {
+	// Test that giving a negative duration returns nil.
+	if got := Tick(-1); got != nil {
+		t.Errorf("Tick(-1) = %v; want nil", got)
+	}
+}
+
+// Test that NewTicker panics when given a duration less than zero.
+func TestNewTickerLtZeroDuration(t *testing.T) {
+	defer func() {
+		if err := recover(); err == nil {
+			t.Errorf("NewTicker(-1) should have panicked")
+		}
+	}()
+	NewTicker(-1)
+}
+
 func BenchmarkTicker(b *testing.B) {
 	ticker := NewTicker(1)
 	b.ResetTimer()
-- 
2.48.1