1 files changed, 71 insertions, 0 deletions
diff --git a/tests/test_buffer.c b/tests/test_buffer.c
new file mode 100644
index 0000000..a8241c4
--- /dev/null
+++ b/tests/test_buffer.c
@@ -0,0 +1,71 @@
+//
+// Created by Anshul Gupta on 4/9/25.
+//
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <stdint.h>
+#include <cmocka.h>
+#include <string.h>
+
+#include "../src/buffer.h"
+
+static void buffer_new_empty_test(void **state)
+{
+	(void) state;
+	const buffer_t buf = buffer_new(0);
+	assert_null(buf.data);
+	assert_int_equal(buf.len, 0);
+	assert_int_equal(buf.cap, 0);
+}
+
+static void buffer_new_test(void **state)
+{
+	(void) state;
+	const buffer_t buf = buffer_new(10);
+	assert_non_null(buf.data);
+	assert_int_equal(buf.len, 0);
+	assert_int_equal(buf.cap, 16); // 10 aligned to 8 bytes
+	buffer_free(buf);
+}
+
+static void buffer_reserve_test(void **state)
+{
+	(void) state;
+	buffer_t buf = buffer_new(10);
+	assert_int_equal(buf.cap, 16); // 10 aligned to 8 bytes
+	buffer_reserve(&buf, 20);
+	assert_int_equal(buf.cap, 24); // 20 aligned to 8 bytes
+	buffer_free(buf);
+}
+
+static void buffer_append_test(void **state)
+{
+	(void) state;
+	buffer_t buf = buffer_new(0);
+	assert_int_equal(buf.cap, 0);
+	const char *data = "Hello, World!";
+	const size_t len = strlen(data);
+	buffer_append(&buf, data, len);
+	assert_int_equal(buf.len, len);
+	assert_int_equal(buf.cap, 16); // 16 bytes allocated
+	assert_memory_equal(buf.data, data, len);
+	buffer_append(&buf, data, len);
+	assert_int_equal(buf.len, len * 2);
+	assert_int_equal(buf.cap, 32); // 32 bytes allocated
+	assert_memory_equal(buf.data + len, data, len);
+	buffer_free(buf);
+}
+
+int main(void)
+{
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(buffer_new_empty_test),
+		cmocka_unit_test(buffer_new_test),
+		cmocka_unit_test(buffer_reserve_test),
+		cmocka_unit_test(buffer_append_test),
+	};
+
+	return cmocka_run_group_tests(tests, NULL, NULL);
+}