Add arena tests

test/test_arena.cpp

@@ -0,0 +1,55 @@
+#include "../core.c"
+
+void TestScratch() {
+    MA_Arena *scratch_arena_test = NULL;
+    {
+        MA_Scratch scratch;
+        IO_Assert(scratch.checkpoint.arena->len == 0);
+        IO_Assert(scratch.checkpoint.arena->memory.data == NULL);
+        int *a = MA_PushStruct(scratch, int);
+        IO_Assert(scratch.checkpoint.arena->memory.data);
+        IO_Assert(scratch.checkpoint.arena->len == sizeof(int));
+        IO_Assert(scratch.checkpoint.arena);
+        scratch_arena_test = scratch.checkpoint.arena;
+
+        int b = 10;
+        IO_Assert(MA_IsPointerInside(scratch, a));
+        IO_Assert(!MA_IsPointerInside(scratch, &b));
+    }
+
+    {
+        MA_Scratch scratch;
+        IO_Assert(scratch_arena_test == scratch.checkpoint.arena);
+        IO_Assert(scratch.checkpoint.arena->len == 0);
+
+        MA_Scratch scratch2(scratch.checkpoint);
+        IO_Assert(scratch.checkpoint.arena != scratch2.checkpoint.arena);
+
+        MA_Scratch scratch3(scratch.checkpoint, scratch2.checkpoint);
+        IO_Assert(scratch3.checkpoint.arena != scratch2.checkpoint.arena);
+    }
+}
+
+void TestBuffer() {
+    char buffer[1024];
+    MA_Arena buffer_arena = MA_MakeFromBuffer(buffer, 1024);
+    void *result = MA_PushSize(&buffer_arena, 1024);
+    IO_Assert(buffer == result);
+    IO_Assert(buffer_arena.len == 1024);
+    IO_Assert(buffer_arena.memory.commit == 1024);
+    IO_Assert(buffer_arena.memory.reserve == 1024);
+}
+
+void TestCreateAllocate() {
+    MA_Arena created_arena = MA_Create();
+    IO_Assert(MA_GetTop(&created_arena) != 0);
+    MA_PushSize(&created_arena, MA_MIB(64));
+    IO_Assert(created_arena.len == MA_MIB(64));
+    MA_DeallocateArena(&created_arena);
+}
+
+int main() {
+    TestScratch();
+    TestBuffer();
+    TestCreateAllocate();
+}