add test.cc

source/extensions/common/wasm/shared_from_test.cc

@@ -0,0 +1,95 @@
+#include <memory>
+#include "gtest/gtest.h"
+class ShareDefault : public std::enable_shared_from_this<ShareDefault> {
+};
+
+class ShareNoExplicitEnableSharedFromThis : public std::enable_shared_from_this<ShareNoExplicitEnableSharedFromThis> {
+ public:
+  ShareNoExplicitEnableSharedFromThis() = default;
+  ShareNoExplicitEnableSharedFromThis(const ShareNoExplicitEnableSharedFromThis&) /*: enable_shared_from_this<>() */ {}
+};
+
+class ShareNoExplicitCtorNeedArg : public std::enable_shared_from_this<ShareNoExplicitCtorNeedArg> {
+ public:
+  ShareNoExplicitCtorNeedArg(int i) : i_(i);
+  ShareNoExplicitCtorNeedArg(const ShareNoExplicitCtorNeedArg&) /*: enable_shared_from_this<>() */ {}
+ private:
+  int i_;
+};
+
+class ShareFoo : public std::enable_shared_from_this<ShareFoo> {
+ public:
+  ShareFoo() = default;
+  ShareFoo(const ShareFoo&) : enable_shared_from_this<ShareFoo>() {}
+};
+
+class ShareBar : public std::enable_shared_from_this<ShareBar> {
+ public:
+  ShareBar() = default;
+  ShareBar(const ShareBar& that) : enable_shared_from_this<ShareBar>(that) {}
+};
+
+TEST(ShareDefaultTest, copyShareNoExplicitEnableSharedFromThis) {
+  using ShareStruct = ShareNoExplicitEnableSharedFromThis;
+  auto pShare = std::make_shared<ShareStruct>();
+  EXPECT_EQ(1, pShare.use_count());
+  auto copyShare = std::make_shared<ShareStruct>(*pShare);
+  ASSERT_EQ(1, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+  auto copyPtr = pShare;
+  ASSERT_EQ(2, copyPtr.use_count());
+  ASSERT_EQ(2, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+}
+
+TEST(ShareDefaultTest, copyShareNoExplicitCtorNeedArg) {
+  using ShareStruct = ShareNoExplicitCtorNeedArg;
+  auto pShare = std::make_shared<ShareStruct>();
+  EXPECT_EQ(1, pShare.use_count());
+  auto copyShare = std::make_shared<ShareStruct>(*pShare);
+  ASSERT_EQ(1, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+  auto copyPtr = pShare;
+  ASSERT_EQ(2, copyPtr.use_count());
+  ASSERT_EQ(2, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+}
+
+TEST(ShareDefaultTest, copyShareDefault) {
+  using ShareStruct = ShareDefault;
+  auto pShare = std::make_shared<ShareStruct>();
+  EXPECT_EQ(1, pShare.use_count());
+  auto copyShare = std::make_shared<ShareStruct>(*pShare);
+  ASSERT_EQ(1, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+  auto copyPtr = pShare;
+  ASSERT_EQ(2, copyPtr.use_count());
+  ASSERT_EQ(2, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+}
+
+TEST(ShareFooTest, copyShareFoo) {
+  using ShareStruct = ShareFoo;
+  auto pShare = std::make_shared<ShareStruct>();
+  EXPECT_EQ(1, pShare.use_count());
+  auto copyShare = std::make_shared<ShareStruct>(*pShare);
+  ASSERT_EQ(1, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+  auto copyPtr = pShare;
+  ASSERT_EQ(2, copyPtr.use_count());
+  ASSERT_EQ(2, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+}
+
+TEST(ShareBarTest, copyShareBar) {
+  using ShareStruct = ShareBar;
+  auto pShare = std::make_shared<ShareStruct>();
+  EXPECT_EQ(1, pShare.use_count());
+  auto copyShare = std::make_shared<ShareStruct>(*pShare);
+  EXPECT_EQ(1, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+  auto copyPtr = pShare;
+  ASSERT_EQ(2, copyPtr.use_count());
+  ASSERT_EQ(2, pShare.use_count());
+  ASSERT_EQ(1, copyShare.use_count());
+}