From 601f00f6fb13e8999ec92a948527fdde2eaf1276 Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Sat, 25 Mar 2017 13:06:00 +1300
Subject: [PATCH] Add AtomicTimer tests

---
 src/gtest/test_metrics.cpp | 48 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/src/gtest/test_metrics.cpp b/src/gtest/test_metrics.cpp
index 8a5a1b5ce..c199b323e 100644
--- a/src/gtest/test_metrics.cpp
+++ b/src/gtest/test_metrics.cpp
@@ -4,6 +4,54 @@
 #include "utiltime.h"
 
 
+TEST(Metrics, AtomicTimer) {
+    AtomicTimer t;
+    SetMockTime(100);
+
+    EXPECT_FALSE(t.running());
+
+    t.start();
+    EXPECT_TRUE(t.running());
+
+    t.start();
+    EXPECT_TRUE(t.running());
+
+    t.stop();
+    EXPECT_TRUE(t.running());
+
+    t.stop();
+    EXPECT_FALSE(t.running());
+
+    // Additional calls to stop() are ignored.
+    t.stop();
+    EXPECT_FALSE(t.running());
+
+    t.start();
+    EXPECT_TRUE(t.running());
+
+    AtomicCounter c;
+    EXPECT_EQ(0, t.rate(c));
+
+    c.increment();
+    EXPECT_EQ(0, t.rate(c));
+
+    SetMockTime(101);
+    EXPECT_EQ(1, t.rate(c));
+
+    c.decrement();
+    EXPECT_EQ(0, t.rate(c));
+
+    SetMockTime(102);
+    EXPECT_EQ(0, t.rate(c));
+
+    c.increment();
+    EXPECT_EQ(0.5, t.rate(c));
+
+    t.stop();
+    EXPECT_FALSE(t.running());
+    EXPECT_EQ(0.5, t.rate(c));
+}
+
 TEST(Metrics, GetLocalSolPS) {
     SetMockTime(100);
     miningTimer.start();