diff -r 9965df621652 -r a786b0a89b37 tests/test_mempool.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_mempool.c	Sat Dec 30 14:11:20 2023 +0100
@@ -0,0 +1,180 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2023 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/test.h"
+#include "util_allocator.h"
+
+#include "cx/mempool.h"
+
+CX_TEST(test_mempool_create) {
+    CxMempool *pool = cxBasicMempoolCreate(16);
+    CX_TEST_DO {
+        CX_TEST_ASSERT(pool->auto_destr == NULL);
+        CX_TEST_ASSERT(pool->allocator != NULL);
+        CX_TEST_ASSERT(pool->allocator->cl != NULL);
+        CX_TEST_ASSERT(pool->allocator->data == pool);
+        CX_TEST_ASSERT(pool->allocator->cl->malloc != NULL);
+        CX_TEST_ASSERT(pool->allocator->cl->calloc != NULL);
+        CX_TEST_ASSERT(pool->allocator->cl->realloc != NULL);
+        CX_TEST_ASSERT(pool->allocator->cl->free != NULL);
+        CX_TEST_ASSERT(pool->capacity == 16);
+        CX_TEST_ASSERT(pool->size == 0);
+        CX_TEST_ASSERT(pool->data != NULL);
+    }
+    cxMempoolDestroy(pool);
+}
+
+CX_TEST(test_mempool_malloc) {
+    CxMempool *pool = cxBasicMempoolCreate(4);
+    CX_TEST_DO {
+        CX_TEST_ASSERT(cxMalloc(pool->allocator, sizeof(int)) != NULL);
+        CX_TEST_ASSERT(cxMalloc(pool->allocator, sizeof(int)) != NULL);
+        CX_TEST_ASSERT(pool->size == 2);
+        CX_TEST_ASSERT(pool->capacity == 4);
+        CX_TEST_ASSERT(cxMalloc(pool->allocator, sizeof(int)) != NULL);
+        CX_TEST_ASSERT(cxMalloc(pool->allocator, sizeof(int)) != NULL);
+        CX_TEST_ASSERT(pool->size == 4);
+        CX_TEST_ASSERT(pool->capacity == 4);
+        CX_TEST_ASSERT(cxMalloc(pool->allocator, sizeof(int)) != NULL);
+        CX_TEST_ASSERT(cxMalloc(pool->allocator, sizeof(int)) != NULL);
+        CX_TEST_ASSERT(pool->size == 6);
+        CX_TEST_ASSERT(pool->capacity >= 6);
+    }
+    cxMempoolDestroy(pool);
+}
+
+CX_TEST(test_mempool_calloc) {
+    CxMempool *pool = cxBasicMempoolCreate(4);
+    CX_TEST_DO {
+        int *test = cxCalloc(pool->allocator, 2, sizeof(int));
+        CX_TEST_ASSERT(test != NULL);
+        CX_TEST_ASSERT(test[0] == 0);
+        CX_TEST_ASSERT(test[1] == 0);
+    }
+    cxMempoolDestroy(pool);
+}
+
+static unsigned test_mempool_destructor_called;
+
+static void test_mempool_destructor(__attribute__((__unused__)) void *mem) {
+    test_mempool_destructor_called++;
+}
+
+CX_TEST(test_mempool_realloc) {
+    CxMempool *pool = cxMempoolCreate(4, test_mempool_destructor);
+    CX_TEST_DO {
+        CX_TEST_ASSERT(pool->auto_destr == test_mempool_destructor);
+        int *data = cxMalloc(pool->allocator, sizeof(int));
+        *data = 13;
+
+        int *rdata = data;
+        unsigned n = 1;
+        while (rdata == data) {
+            n <<= 1;
+            // eventually the memory should be moved elsewhere
+            CX_TEST_ASSERTM(n < 65536, "Reallocation attempt failed - test not executable.");
+            rdata = cxRealloc(pool->allocator, data, n * sizeof(intptr_t));
+        }
+
+        CX_TEST_ASSERT(*rdata == 13);
+        // test if destructor is still intact
+        test_mempool_destructor_called = 0;
+        cxFree(pool->allocator, rdata);
+        CX_TEST_ASSERT(test_mempool_destructor_called == 1);
+    }
+    cxMempoolDestroy(pool);
+}
+
+
+CX_TEST(test_mempool_free) {
+    CxMempool *pool = cxBasicMempoolCreate(4);
+    void *mem1, *mem2;
+    CX_TEST_DO {
+        mem1 = cxMalloc(pool->allocator, 16);
+        cxFree(pool->allocator, mem1);
+        CX_TEST_ASSERT(pool->size == 0);
+
+        cxMalloc(pool->allocator, 16);
+        cxMalloc(pool->allocator, 16);
+        mem1 = cxMalloc(pool->allocator, 16);
+        cxMalloc(pool->allocator, 16);
+        mem2 = cxMalloc(pool->allocator, 16);
+
+        CX_TEST_ASSERT(pool->size == 5);
+        cxFree(pool->allocator, mem1);
+        CX_TEST_ASSERT(pool->size == 4);
+        cxFree(pool->allocator, mem2);
+        CX_TEST_ASSERT(pool->size == 3);
+    }
+    cxMempoolDestroy(pool);
+}
+
+CX_TEST(test_mempool_destroy) {
+    CxMempool *pool = cxBasicMempoolCreate(4);
+    CX_TEST_DO {
+        int *data = cxMalloc(pool->allocator, sizeof(int));
+        *data = 13;
+        cxMempoolSetDestructor(data, test_mempool_destructor);
+        CX_TEST_ASSERT(*data == 13);
+        test_mempool_destructor_called = 0;
+        cxFree(pool->allocator, data);
+        CX_TEST_ASSERT(test_mempool_destructor_called == 1);
+        data = cxMalloc(pool->allocator, sizeof(int));
+        cxMempoolSetDestructor(data, test_mempool_destructor);
+        cxMempoolDestroy(pool);
+        CX_TEST_ASSERT(test_mempool_destructor_called == 2);
+    }
+}
+
+CX_TEST(test_mempool_register) {
+    CxMempool *pool = cxBasicMempoolCreate(4);
+    CX_TEST_DO {
+        int *data = cxMalloc(pool->allocator, sizeof(int));
+        test_mempool_destructor_called = 0;
+        cxMempoolSetDestructor(data, test_mempool_destructor);
+        int donotfree = 0;
+        cxMempoolRegister(pool, &donotfree, test_mempool_destructor);
+        cxMempoolDestroy(pool);
+        CX_TEST_ASSERT(test_mempool_destructor_called == 2);
+    }
+}
+
+
+CxTestSuite *cx_test_suite_mempool(void) {
+    CxTestSuite *suite = cx_test_suite_new("mempool");
+
+    cx_test_register(suite, test_mempool_create);
+    cx_test_register(suite, test_mempool_malloc);
+    cx_test_register(suite, test_mempool_calloc);
+    cx_test_register(suite, test_mempool_realloc);
+    cx_test_register(suite, test_mempool_free);
+    cx_test_register(suite, test_mempool_destroy);
+    cx_test_register(suite, test_mempool_register);
+
+    return suite;
+}