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-rw-r--r--libmisc/tests/test_macro.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/libmisc/tests/test_macro.c b/libmisc/tests/test_macro.c
new file mode 100644
index 0000000..7cbf9d3
--- /dev/null
+++ b/libmisc/tests/test_macro.c
@@ -0,0 +1,32 @@
+/* libmisc/tests/test_macro.c - Tests for <libmisc/macro.h>
+ *
+ * Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+#include <libmisc/macro.h>
+
+#include "test.h"
+
+int main() {
+ /* valid down to 0. */
+ test_assert(LM_NEXT_POWER_OF_2(0) == 1);
+ test_assert(LM_NEXT_POWER_OF_2(1) == 2);
+ test_assert(LM_NEXT_POWER_OF_2(2) == 4);
+ test_assert(LM_NEXT_POWER_OF_2(3) == 4);
+ test_assert(LM_NEXT_POWER_OF_2(4) == 8);
+ test_assert(LM_NEXT_POWER_OF_2(5) == 8);
+ test_assert(LM_NEXT_POWER_OF_2(6) == 8);
+ test_assert(LM_NEXT_POWER_OF_2(7) == 8);
+ test_assert(LM_NEXT_POWER_OF_2(8) == 16);
+ /* ... */
+ test_assert(LM_NEXT_POWER_OF_2(16) == 32);
+ /* ... */
+ test_assert(LM_NEXT_POWER_OF_2(0x7000000000000000) == 0x8000000000000000);
+ /* ... */
+ test_assert(LM_NEXT_POWER_OF_2(0x8000000000000000-1) == 0x8000000000000000);
+ /* Valid up to 0x8000000000000000-1 = (1<<63)-1 */
+ test_assert(LM_NEXT_POWER_OF_2(0x8000000000000000) == 0); /* :( */
+
+ return 0;
+}