1 files changed, 98 insertions, 0 deletions
diff --git a/lib/libk/stdlib/test_linked_list_allocator.cc b/lib/libk/stdlib/test_linked_list_allocator.cc
new file mode 100644
index 0000000..5963ce1
--- /dev/null
+++ b/lib/libk/stdlib/test_linked_list_allocator.cc
@@ -0,0 +1,98 @@
+#include <gtest/gtest.h>
+#include <iomanip>
+#include <iostream>
+
+namespace libk {
+#include "linked_list_allocator.c"
+
+std::ostream &
+operator<<(std::ostream &os, const Chunk &b)
+{
+  for (const Chunk *iter = &b; iter != nullptr; iter = iter->next) {
+    os << iter << "   used=" << iter->used << "  size=" << std::setw(4) << iter->size << "  next=" << iter->next
+       << std::endl;
+  }
+  return os;
+}
+}; // namespace libk
+
+#include "test_allocator.hh"
+
+TEST(UninitializedAllocator, malloc) { EXPECT_EQ(libk::malloc(1024), nullptr); }
+
+TEST_F(TestAllocator, mallocMoreThanAvialable)
+{
+  void *ptr = libk::malloc(memory_size);
+  EXPECT_EQ(ptr, nullptr) << *libk::begin;
+}
+
+TEST_F(TestAllocator, mallocExactlyAvialable)
+{
+  void *ptr = libk::malloc(memory_size - sizeof(libk::Chunk));
+  EXPECT_NE(ptr, nullptr) << *libk::begin;
+}
+
+TEST_F(TestAllocator, malloc)
+{
+  libk::Chunk *begin = libk::begin;
+
+  void *ptr0 = libk::malloc(1024);
+  EXPECT_NE(ptr0, nullptr) << *libk::begin;
+  EXPECT_EQ(reinterpret_cast<std::uintptr_t>(ptr0),
+            reinterpret_cast<std::uintptr_t>(libk::begin) + sizeof(libk::Chunk));
+  EXPECT_EQ(begin->used, 1);
+  EXPECT_EQ(begin->size, 1024);
+  ASSERT_NE(begin->next, nullptr);
+  begin = begin->next;
+
+  void *ptr1 = libk::malloc(512);
+  EXPECT_NE(ptr1, nullptr) << *libk::begin;
+  EXPECT_EQ(reinterpret_cast<std::uintptr_t>(ptr1),
+            reinterpret_cast<std::uintptr_t>(libk::begin) + 2 * sizeof(libk::Chunk) + 1024);
+  EXPECT_EQ(begin->used, 1);
+  EXPECT_EQ(begin->size, 512);
+  ASSERT_NE(begin->next, nullptr);
+}
+
+TEST_F(TestAllocator, freeNullptr)
+{
+  void *ptr0 = libk::malloc(1024);
+  EXPECT_NE(ptr0, nullptr) << *libk::begin;
+  void *ptr1 = libk::malloc(512);
+  EXPECT_NE(ptr1, nullptr) << *libk::begin;
+
+  libk::free(nullptr);
+  libk::Chunk *begin = libk::begin;
+  EXPECT_EQ(begin->used, 1);
+  EXPECT_NE(begin->next, nullptr);
+  begin = begin->next;
+  EXPECT_EQ(begin->used, 1);
+  EXPECT_NE(begin->next, nullptr);
+  begin = begin->next;
+  EXPECT_EQ(begin->used, 0);
+  EXPECT_EQ(begin->next, nullptr);
+}
+
+TEST_F(TestAllocator, free)
+{
+  void *ptr0 = libk::malloc(1024);
+  EXPECT_NE(ptr0, nullptr) << *libk::begin;
+  void *ptr1 = libk::malloc(512);
+  EXPECT_NE(ptr1, nullptr) << *libk::begin;
+
+  libk::free(ptr0);
+  libk::Chunk *begin = libk::begin;
+  EXPECT_EQ(begin->used, 0) << ptr0 << ": ptr0" << std::endl << *libk::begin;
+  EXPECT_NE(begin->next, nullptr);
+  begin = begin->next;
+  EXPECT_EQ(begin->used, 1);
+  EXPECT_NE(begin->next, nullptr);
+  begin = begin->next;
+  EXPECT_EQ(begin->used, 0);
+  EXPECT_EQ(begin->next, nullptr);
+
+  libk::free(ptr1);
+  begin = libk::begin;
+  EXPECT_EQ(begin->used, 0) << ptr0 << ": ptr0" << std::endl << *libk::begin;
+  EXPECT_EQ(begin->next, nullptr);
+}