Add unit tests of Counters class

diff --git a/unittest/CMakeLists.txt b/unittest/CMakeLists.txt
index 360824f800258025ddca50e8e8b6d0a4718f1731..6ae54ffa21f16564ff5d58d5886b09e66ff3942e 100644 (file)
--- a/unittest/CMakeLists.txt
+++ b/unittest/CMakeLists.txt
@@ -7,6 +7,7 @@ set(
   test_Checksum.cpp
   test_Compression.cpp
   test_Config.cpp
+  test_Counters.cpp
   test_FormatNonstdStringView.cpp
   test_Hash.cpp
   test_Lockfile.cpp

diff --git a/unittest/test_Counters.cpp b/unittest/test_Counters.cpp
new file mode 100644 (file)
index 0000000..951856a
--- /dev/null
+++ b/unittest/test_Counters.cpp
@@ -0,0 +1,92 @@
+// Copyright (C) 2020 Joel Rosdahl and other contributors
+//
+// See doc/AUTHORS.adoc for a complete list of contributors.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+// more details.
+//
+// You should have received a copy of the GNU General Public License along with
+// this program; if not, write to the Free Software Foundation, Inc., 51
+// Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+#include "../src/Counters.hpp"
+#include "../src/stats.hpp"
+#include "TestUtil.hpp"
+
+#include "third_party/doctest.h"
+
+using TestUtil::TestContext;
+
+TEST_SUITE_BEGIN("Counters");
+
+TEST_CASE("Counters")
+{
+  TestContext test_context;
+
+  Counters counters;
+  CHECK(counters.size() == static_cast<size_t>(Statistic::END));
+
+  SUBCASE("Get and set statistic")
+  {
+    CHECK(counters.get(Statistic::cache_miss) == 0);
+    counters.set(Statistic::cache_miss, 27);
+    CHECK(counters.get(Statistic::cache_miss) == 27);
+  }
+
+  SUBCASE("Get and set raw index")
+  {
+    CHECK(counters.get_raw(4) == 0);
+    counters.set_raw(4, 27);
+    CHECK(counters.get(Statistic::cache_miss) == 27);
+  }
+
+  SUBCASE("Set future raw counter")
+  {
+    const auto future_index = static_cast<size_t>(Statistic::END) + 2;
+    counters.set_raw(future_index, 42);
+    CHECK(counters.get_raw(future_index) == 42);
+  }
+
+  SUBCASE("Increment single counter")
+  {
+    counters.set(Statistic::cache_miss, 4);
+
+    counters.increment(Statistic::cache_miss);
+    CHECK(counters.get(Statistic::cache_miss) == 5);
+
+    counters.increment(Statistic::cache_miss, -3);
+    CHECK(counters.get(Statistic::cache_miss) == 2);
+
+    counters.increment(Statistic::cache_miss, -3);
+    CHECK(counters.get(Statistic::cache_miss) == 0);
+  }
+
+  SUBCASE("Increment many counters")
+  {
+    counters.set(Statistic::direct_cache_hit, 3);
+    counters.set(Statistic::cache_miss, 2);
+    counters.set(Statistic::files_in_cache, 10);
+    counters.set(Statistic::cache_size_kibibyte, 1);
+
+    Counters updates;
+    updates.set(Statistic::direct_cache_hit, 6);
+    updates.set(Statistic::cache_miss, 5);
+    updates.set(Statistic::files_in_cache, -1);
+    updates.set(Statistic::cache_size_kibibyte, -4);
+
+    counters.increment(updates);
+    CHECK(counters.get(Statistic::direct_cache_hit) == 9);
+    CHECK(counters.get(Statistic::cache_miss) == 7);
+    CHECK(counters.get(Statistic::files_in_cache) == 9);
+    CHECK(counters.get(Statistic::cache_size_kibibyte) == 0); // No wrap-around
+  }
+}
+
+TEST_SUITE_END();