minmax: New module, safe min and max macros

[ccan] / ccan / minmax / test / run.c

diff --git a/ccan/minmax/test/run.c b/ccan/minmax/test/run.c
new file mode 100644 (file)
index 0000000..e954efd
--- /dev/null
+++ b/ccan/minmax/test/run.c
@@ -0,0 +1,46 @@
+#include <ccan/minmax/minmax.h>
+#include <ccan/tap/tap.h>
+
+int main(void)
+{
+       int a, b;
+
+       /* This is how many tests you plan to run */
+       plan_tests(23);
+
+       ok1(min(1, 2) == 1);
+       ok1(max(1, 2) == 2);
+       ok1(min(-1, 1) == -1);
+       ok1(max(-1, 1) == 1);
+
+       ok1(min(-1U, 1U) == 1U);
+       ok1(max(-1U, 1U) == -1U);
+
+       ok1(max_t(signed int, -1, 1U) == 1);
+       ok1(max_t(unsigned int, -1, 1) == -1U);
+
+       ok1(min_t(signed int, -1, 1U) == -1);
+       ok1(min_t(unsigned int, -1, 1) == 1U);
+
+       ok1(clamp(1, 2, 5) == 2);
+       ok1(clamp(2, 2, 5) == 2);
+       ok1(clamp(3, 2, 5) == 3);
+       ok1(clamp(5, 2, 5) == 5);
+       ok1(clamp(6, 2, 5) == 5);
+
+       ok1(clamp(-1, 2, 5) == 2);
+       ok1(clamp(-1U, 2U, 5U) == 5U);
+
+       ok1(clamp_t(signed int, -1, 2, 5) == 2);
+       ok1(clamp_t(unsigned int, -1, 2, 5) == 5);
+
+       /* test for double evaluation */
+       a = b = 0;
+       ok1(min(a++, b++) == 0);
+       ok1((a == 1) && (b == 1));
+       ok1(max(++a, ++b) == 2);
+       ok1((a == 2) && (b == 2));
+
+       /* This exits depending on whether all tests passed */
+       return exit_status();
+}