diff -r 814d51173f20 -r e866516cac17 test/test_buffer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/test_buffer.cpp	Sun Apr 24 15:15:39 2022 +0200
@@ -0,0 +1,74 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "cx/buffer.h"
+
+#include <gtest/gtest.h>
+#include "util_allocator.h"
+
+class Buffer : public ::testing::Test {
+protected:
+    void TearDown() override {
+        EXPECT_TRUE(testingAllocator.verify());
+    }
+
+    CxTestingAllocator testingAllocator;
+};
+
+TEST_F(Buffer, WrapSpace) {
+    CxBuffer buf;
+    void *space = cxMalloc(&testingAllocator, 16);
+    cxBufferInit(&buf, space, 16, &testingAllocator, CX_BUFFER_DEFAULT);
+    EXPECT_EQ(buf.space, space);
+    EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
+    EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
+    EXPECT_EQ(buf.pos, 0);
+    EXPECT_EQ(buf.size, 0);
+    EXPECT_EQ(buf.capacity, 16);
+    EXPECT_EQ(buf.allocator, &testingAllocator);
+    cxBufferDestroy(&buf);
+    EXPECT_FALSE(testingAllocator.verify());
+    cxFree(&testingAllocator, space);
+    EXPECT_TRUE(testingAllocator.verify());
+}
+
+TEST_F(Buffer, WrapSpaceAutoFree) {
+    CxBuffer buf;
+    void *space = cxMalloc(&testingAllocator, 16);
+    cxBufferInit(&buf, space, 16, &testingAllocator, CX_BUFFER_FREE_CONTENTS);
+    EXPECT_EQ(buf.space, space);
+    EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
+    EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
+    EXPECT_EQ(buf.pos, 0);
+    EXPECT_EQ(buf.size, 0);
+    EXPECT_EQ(buf.capacity, 16);
+    EXPECT_EQ(buf.allocator, &testingAllocator);
+    EXPECT_FALSE(testingAllocator.verify());
+    cxBufferDestroy(&buf);
+    EXPECT_TRUE(testingAllocator.verify());
+}