From 5295c9618cbae2bb937e188c072f66a77d793eb5 Mon Sep 17 00:00:00 2001
From: Dan Engelbrecht <dan.engelbrecht@epicgames.com>
Date: Mon, 6 Nov 2023 15:55:39 +0100
Subject: gc v2 tests (#512)

* set MaxBlockCount at init
* properly calculate total size
* basic blockstore compact blocks test
* correct detection of block swap
* Use one implementation for CreateRandomBlob
* reduce some data sets to increase speed of tests
* reduce test time
* rename BlockStoreCompactState::AddBlock -> BlockStoreCompactState::IncludeBlock
---
 src/zencore/testutils.cpp | 42 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

(limited to 'src/zencore/testutils.cpp')

diff --git a/src/zencore/testutils.cpp b/src/zencore/testutils.cpp
index dbc3ab5af..d4c8aeaef 100644
--- a/src/zencore/testutils.cpp
+++ b/src/zencore/testutils.cpp
@@ -1,10 +1,13 @@
 // Copyright Epic Games, Inc. All Rights Reserved.
 
 #include "zencore/testutils.h"
-#include <zencore/session.h>
-#include "zencore/string.h"
 
-#include <atomic>
+#if ZEN_WITH_TESTS
+
+#	include <zencore/session.h>
+#	include "zencore/string.h"
+
+#	include <atomic>
 
 namespace zen {
 
@@ -39,4 +42,35 @@ ScopedTemporaryDirectory::~ScopedTemporaryDirectory()
 	std::filesystem::remove_all(m_RootPath, Ec);
 }
 
-}  // namespace zen
\ No newline at end of file
+IoBuffer
+CreateRandomBlob(uint64_t Size)
+{
+	static uint64_t Seed{0x7CEBF54E45B9F5D1};
+	auto			Next = [](uint64_t& seed) {
+		   uint64_t z = (seed += UINT64_C(0x9E3779B97F4A7C15));
+		   z		  = (z ^ (z >> 30)) * UINT64_C(0xBF58476D1CE4E5B9);
+		   z		  = (z ^ (z >> 27)) * UINT64_C(0x94D049BB133111EB);
+		   return z ^ (z >> 31);
+	};
+
+	IoBuffer  Data(Size);
+	uint64_t* DataPtr = reinterpret_cast<uint64_t*>(Data.MutableData());
+	while (Size > sizeof(uint64_t))
+	{
+		*DataPtr++ = Next(Seed);
+		Size -= sizeof(uint64_t);
+	}
+	uint64_t ByteNext	 = Next(Seed);
+	uint8_t* ByteDataPtr = reinterpret_cast<uint8_t*>(DataPtr);
+	while (Size > 0)
+	{
+		*ByteDataPtr++ = static_cast<uint8_t>(ByteNext & 0xff);
+		ByteNext >>= 8;
+		Size--;
+	}
+	return Data;
+};
+
+}  // namespace zen
+
+#endif	// ZEN_WITH_TESTS
-- 
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