Move folly/MallctlHelper.h to folly/memory/

[folly.git] / folly / test / MemoryTest.cpp

diff --git a/folly/test/MemoryTest.cpp b/folly/test/MemoryTest.cpp
index c9409d2206148247e31b0cc08258da1b1dbb6861..5ad28d5abb91ce3e32c3ce8f8d4f109cad2f678a 100644 (file)
--- a/folly/test/MemoryTest.cpp
+++ b/folly/test/MemoryTest.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,17 +14,39 @@
  * limitations under the License.
  */
 
-#include "folly/Memory.h"
-#include "folly/Arena.h"
-#include "folly/String.h"
+#include <folly/Memory.h>
+
+#include <type_traits>
+#include <utility>
 
 #include <glog/logging.h>
-#include <gtest/gtest.h>
 
-#include <type_traits>
+#include <folly/Arena.h>
+#include <folly/String.h>
+#include <folly/portability/GTest.h>
 
 using namespace folly;
 
+TEST(make_unique, compatible_with_std_make_unique) {
+  //  HACK: To enforce that `folly::` is imported here.
+  to_shared_ptr(std::unique_ptr<std::string>());
+
+  using namespace std;
+  make_unique<string>("hello, world");
+}
+
+TEST(to_weak_ptr, example) {
+  auto s = std::make_shared<int>(17);
+  EXPECT_EQ(1, s.use_count());
+  EXPECT_EQ(2, (to_weak_ptr(s).lock(), s.use_count())) << "lvalue";
+  EXPECT_EQ(3, (to_weak_ptr(decltype(s)(s)).lock(), s.use_count())) << "rvalue";
+}
+
+TEST(allocate_sys_buffer, compiles) {
+  auto buf = allocate_sys_buffer(256);
+  //  Freed at the end of the scope.
+}
+
 template <std::size_t> struct T {};
 template <std::size_t> struct S {};
 template <std::size_t> struct P {};
@@ -58,10 +80,75 @@ TEST(StlAllocator, void_allocator) {
   ASSERT_EQ(nullptr, i.get());
 }
 
-int main(int argc, char **argv) {
-  FLAGS_logtostderr = true;
-  google::InitGoogleLogging(argv[0]);
-  testing::InitGoogleTest(&argc, argv);
+TEST(rebind_allocator, sanity_check) {
+  std::allocator<long> alloc;
+
+  auto i = std::allocate_shared<int>(
+    rebind_allocator<int, decltype(alloc)>(alloc), 10
+  );
+  ASSERT_NE(nullptr, i.get());
+  EXPECT_EQ(10, *i);
+  i.reset();
+  ASSERT_EQ(nullptr, i.get());
+
+  auto d = std::allocate_shared<double>(
+    rebind_allocator<double>(alloc), 5.6
+  );
+  ASSERT_NE(nullptr, d.get());
+  EXPECT_EQ(5.6, *d);
+  d.reset();
+  ASSERT_EQ(nullptr, d.get());
+
+  auto s = std::allocate_shared<std::string>(
+    rebind_allocator<std::string>(alloc), "HELLO, WORLD"
+  );
+  ASSERT_NE(nullptr, s.get());
+  EXPECT_EQ("HELLO, WORLD", *s);
+  s.reset();
+  ASSERT_EQ(nullptr, s.get());
+}
+
+template <typename C>
+static void test_enable_shared_from_this(std::shared_ptr<C> sp) {
+  ASSERT_EQ(1l, sp.use_count());
+
+  // Test shared_from_this().
+  std::shared_ptr<C> sp2 = sp->shared_from_this();
+  ASSERT_EQ(sp, sp2);
+
+  // Test weak_from_this().
+  std::weak_ptr<C> wp = sp->weak_from_this();
+  ASSERT_EQ(sp, wp.lock());
+  sp.reset();
+  sp2.reset();
+  ASSERT_EQ(nullptr, wp.lock());
+
+  // Test shared_from_this() and weak_from_this() on object not owned by a
+  // shared_ptr. Undefined in C++14 but well-defined in C++17. Also known to
+  // work with libstdc++ >= 20150123. Feel free to add other standard library
+  // versions where the behavior is known.
+#if __cplusplus >= 201700L || \
+    __GLIBCXX__ >= 20150123L
+  C stack_resident;
+  ASSERT_THROW(stack_resident.shared_from_this(), std::bad_weak_ptr);
+  ASSERT_TRUE(stack_resident.weak_from_this().expired());
+#endif
+}
+
+TEST(enable_shared_from_this, compatible_with_std_enable_shared_from_this) {
+  // Compile-time compatibility.
+  class C_std : public std::enable_shared_from_this<C_std> {};
+  class C_folly : public folly::enable_shared_from_this<C_folly> {};
+  static_assert(
+    noexcept(std::declval<C_std>().shared_from_this()) ==
+    noexcept(std::declval<C_folly>().shared_from_this()), "");
+  static_assert(
+    noexcept(std::declval<C_std const>().shared_from_this()) ==
+    noexcept(std::declval<C_folly const>().shared_from_this()), "");
+  static_assert(noexcept(std::declval<C_folly>().weak_from_this()), "");
+  static_assert(noexcept(std::declval<C_folly const>().weak_from_this()), "");
 
-  return RUN_ALL_TESTS();
+  // Runtime compatibility.
+  test_enable_shared_from_this(std::make_shared<C_folly>());
+  test_enable_shared_from_this(std::make_shared<C_folly const>());
 }