1 files changed, 45 insertions, 0 deletions
diff --git a/library/cpp/testing/hook/hook.cpp b/library/cpp/testing/hook/hook.cpp
new file mode 100644
index 00000000000..b3c599da890
--- /dev/null
+++ b/library/cpp/testing/hook/hook.cpp
@@ -0,0 +1,45 @@
+#include "hook.h"
+
+namespace {
+    NTesting::THook* BeforeInitHead = nullptr;
+    NTesting::THook* BeforeRunHead = nullptr;
+    NTesting::THook* AfterRunHead = nullptr;
+
+    void RegisterHook(NTesting::THook*& head, NTesting::THook* hook) {
+        hook->Next = head;
+        head = hook;
+    }
+
+    void CallHooks(NTesting::THook* head) {
+        while (nullptr != head) {
+            if (nullptr != head->Fn) {
+                (*head->Fn)();
+            }
+            head = head->Next;
+        }
+    }
+}
+
+void NTesting::THook::RegisterBeforeInit(NTesting::THook* hook) noexcept {
+    RegisterHook(BeforeInitHead, hook);
+}
+
+void NTesting::THook::CallBeforeInit() {
+    CallHooks(BeforeInitHead);
+}
+
+void NTesting::THook::RegisterBeforeRun(NTesting::THook* hook) noexcept {
+    RegisterHook(BeforeRunHead, hook);
+}
+
+void NTesting::THook::CallBeforeRun() {
+    CallHooks(BeforeRunHead);
+}
+
+void NTesting::THook::RegisterAfterRun(NTesting::THook* hook) noexcept {
+    RegisterHook(AfterRunHead, hook);
+}
+
+void NTesting::THook::CallAfterRun() {
+    CallHooks(AfterRunHead);
+}