Add filter test, remove re test, and googletest deps

test/CMakeLists.txt

 # Enable the tests
 
-# Import and build Google Test
-include(ExternalProject)
-set_directory_properties(properties EP_PREFIX "${CMAKE_BINARY_DIR}/third_party")
-ExternalProject_Add(googletest
-  URL "https://googletest.googlecode.com/files/gtest-1.7.0.zip"
-  URL_MD5 2d6ec8ccdf5c46b05ba54a9fd1d130d7
-  SOURCE_DIR "${CMAKE_BINARY_DIR}/third_party/gtest"
-  CMAKE_ARGS "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-  INSTALL_COMMAND "")
-
-ExternalProject_Get_Property(googletest source_dir)
-ExternalProject_Get_Property(googletest binary_dir)
-include_directories(${source_dir}/include)
-link_directories(${binary_dir})
-
 find_package(Threads REQUIRED)
 
 macro(compile_benchmark_test name)
   add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark gtest ${CMAKE_THREAD_LIBS_INIT})
-  add_dependencies(${name} googletest)
+  target_link_libraries(${name} benchmark ${CMAKE_THREAD_LIBS_INIT})
 endmacro(compile_benchmark_test)
 
-macro(add_gtest_test name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark gtest gtest_main ${CMAKE_THREAD_LIBS_INIT})
-  add_dependencies(${name} googletest)
-  add_test(${name} ${name})
-endmacro(add_gtest_test)
-
 # Demonstration executable
 compile_benchmark_test(benchmark_test)
 add_test(benchmark benchmark_test --benchmark_min_time=0.1 51)
-add_test(benchmark_filter_simple benchmark_test --benchmark_filter=Calculate 16)
-add_test(benchmark_filter_suffix benchmark_test --benchmark_filter=Calculate* 16)
-add_test(benchmark_filter_regex_wildcard benchmark_test --benchmark_filter=.*Calculate.* 16)
 
-add_gtest_test(re_test)
+compile_benchmark_test(filter_test)
+add_test(filter_simple filter_test --benchmark_filter=Calculate 16)
+add_test(filter_suffix filter_test --benchmark_filter=Calculate* 16)
+add_test(filter_regex_all filter_test --benchmark_filter=.* 16)
+add_test(filter_regex_blank filter_test --benchmark_filter= 16)
+add_test(filter_regex_none filter_test --benchmark_filter=monkey 0)
+add_test(filter_regex_wildcard filter_test --benchmark_filter=.*Calculate.* 16)
+add_test(filter_regex_begin filter_test --benchmark_filter=^BM_Calculate.* 16)
+add_test(filter_regex_end filter_test --benchmark_filter=.*Pi$ 8)

test/benchmark_test.cc

@@ -14,8 +14,6 @@
 #include <string>
 #include <vector>
 
-#include <gtest/gtest.h>
-
 #if defined(__GNUC__)
 # define BENCHMARK_NOINLINE __attribute__((noinline))
 #else
@@ -55,7 +53,7 @@ static void BM_Factorial(benchmark::State& state) {
   while (state.KeepRunning())
     fac_42 = Factorial(8);
   // Prevent compiler optimizations
-  EXPECT_NE(fac_42, std::numeric_limits<int>::max());
+  std::cout << fac_42;
 }
 BENCHMARK(BM_Factorial);
 
@@ -149,45 +147,12 @@ static void BM_LongTest(benchmark::State& state) {
 }
 BENCHMARK(BM_LongTest)->Range(1<<16,1<<28);
 
-class TestReporter : public benchmark::internal::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) const {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) const {
-    ++count_;
-    ConsoleReporter::ReportRuns(report);
-  };
-
-  TestReporter() : count_(0) {}
-
-  virtual ~TestReporter() {}
-
-  size_t GetCount() const {
-    return count_;
-  }
-
- private:
-  mutable size_t count_;
-};
-
 int main(int argc, const char* argv[]) {
   benchmark::Initialize(&argc, argv);
 
   assert(Factorial(8) == 40320);
   assert(CalculatePi(1) == 0.0);
 
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  // Make sure we ran all of the tests
-  const size_t count = test_reporter.GetCount();
-  const size_t expected = (argc == 2) ? std::stoul(argv[1]) : count;
-  if (count != expected) {
-    std::cerr << "ERROR: Expected " << expected << " tests to be ran but only "
-              << count << " completed" << std::endl;
-    return -1;
-  }
+  benchmark::RunSpecifiedBenchmarks();
 }
 

test/filter_test.cc

+#include "benchmark/benchmark.h"
+
+#include <assert.h>
+#include <math.h>
+#include <stdint.h>
+
+#include <iostream>
+#include <sstream>
+#include <string>
+
+namespace {
+
+double CalculatePi(int depth) {
+  double pi = 0.0;
+  for (int i = 0; i < depth; ++i) {
+    double numerator = static_cast<double>(((i % 2) * 2) - 1);
+    double denominator = static_cast<double>((2 * i) - 1);
+    pi += numerator / denominator;
+  }
+  return (pi - 1.0) * 4;
+}
+
+class TestReporter : public benchmark::internal::ConsoleReporter {
+ public:
+  virtual bool ReportContext(const Context& context) const {
+    return ConsoleReporter::ReportContext(context);
+  };
+
+  virtual void ReportRuns(const std::vector<Run>& report) const {
+    ++count_;
+    ConsoleReporter::ReportRuns(report);
+  };
+
+  TestReporter() : count_(0) {}
+
+  virtual ~TestReporter() {}
+
+  size_t GetCount() const {
+    return count_;
+  }
+
+ private:
+  mutable size_t count_;
+};
+
+}  // end namespace
+
+static void BM_CalculatePiRange(benchmark::State& state) {
+  double pi = 0.0;
+  while (state.KeepRunning())
+    pi = CalculatePi(state.range_x());
+  std::stringstream ss;
+  ss << pi;
+  state.SetLabel(ss.str());
+}
+BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
+
+static void BM_CalculatePi(benchmark::State& state) {
+  static const int depth = 1024;
+  double pi BENCHMARK_UNUSED = 0.0;
+  while (state.KeepRunning()) {
+    pi = CalculatePi(depth);
+  }
+}
+BENCHMARK(BM_CalculatePi)->Threads(8);
+BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
+BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
+
+int main(int argc, const char* argv[]) {
+  benchmark::Initialize(&argc, argv);
+
+  assert(CalculatePi(1) == 0.0);
+
+  TestReporter test_reporter;
+  benchmark::RunSpecifiedBenchmarks(&test_reporter);
+
+  // Make sure we ran all of the tests
+  const size_t count = test_reporter.GetCount();
+  const size_t expected = (argc == 2) ? std::stoul(argv[1]) : count;
+  if (count != expected) {
+    std::cerr << "ERROR: Expected " << expected << " tests to be ran but only "
+              << count << " completed" << std::endl;
+    return -1;
+  }
+}
+

test/re_test.cc

-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <gtest/gtest.h>
-#include "../src/re.h"
-
-TEST(Regex, RegexSimple) {
-    benchmark::Regex re;
-    EXPECT_TRUE(re.Init("a+", NULL));
-
-    EXPECT_FALSE(re.Match(""));
-    EXPECT_TRUE(re.Match("a"));
-    EXPECT_TRUE(re.Match("aa"));
-    EXPECT_TRUE(re.Match("baa"));
-    EXPECT_FALSE(re.Match("b"));
-}
-
-TEST(Regex, RegexWildcard) {
-    benchmark::Regex re;
-    EXPECT_TRUE(re.Init("^a*$", NULL));
-
-    EXPECT_TRUE(re.Match(""));
-    EXPECT_TRUE(re.Match("a"));
-    EXPECT_TRUE(re.Match("aa"));
-    EXPECT_FALSE(re.Match("baa"));
-    EXPECT_FALSE(re.Match("b"));
-}
-
-TEST(Regex, RegexAny) {
-    benchmark::Regex re;
-    EXPECT_TRUE(re.Init(".", NULL));
-
-    EXPECT_FALSE(re.Match(""));
-    EXPECT_TRUE(re.Match("a"));
-    EXPECT_TRUE(re.Match("aa"));
-}
-
-TEST(Regex, RegexExact) {
-    benchmark::Regex re;
-    EXPECT_TRUE(re.Init("^.$", NULL));
-
-    EXPECT_FALSE(re.Match(""));
-    EXPECT_TRUE(re.Match("a"));
-    EXPECT_FALSE(re.Match("aa"));
-}
-
-TEST(Regex, RegexComplicated) {
-    benchmark::Regex re;
-    EXPECT_TRUE(re.Init("([0-9]+ )?(mon|low)key(s)?", NULL));
-
-    EXPECT_TRUE(re.Match("something monkey hands"));
-    EXPECT_TRUE(re.Match("1 lowkey"));
-    EXPECT_TRUE(re.Match("19 monkeys"));
-    EXPECT_FALSE(re.Match("09 a"));
-}
-
-TEST(Regex, InvalidNoErrorMessage) {
-    benchmark::Regex re;
-    EXPECT_FALSE(re.Init("[", NULL));
-}
-
-TEST(Regex, Invalid) {
-    std::string error;
-    benchmark::Regex re;
-    EXPECT_FALSE(re.Init("[", &error));
-
-    EXPECT_NE("", error);
-}