1 files changed, 25 insertions, 0 deletions
diff --git a/lib/ccan/tally/test/run-renormalize.c b/lib/ccan/tally/test/run-renormalize.c
new file mode 100644
index 0000000000..7c141528d2
--- /dev/null
+++ b/lib/ccan/tally/test/run-renormalize.c
@@ -0,0 +1,25 @@
+#include <ccan/tally/tally.c>
+#include <ccan/tap/tap.h>
+
+int main(void)
+{
+	struct tally *tally = tally_new(2);
+
+	plan_tests(4);
+	tally->min = 0;
+	tally->max = 0;
+	tally->counts[0] = 1;
+
+	/* This renormalize should do nothing. */
+	renormalize(tally, 0, 1);
+	ok1(tally->counts[0] == 1);
+	ok1(tally->counts[1] == 0);
+	tally->counts[1]++;
+
+	/* This renormalize should collapse both into bucket 0. */
+	renormalize(tally, 0, 3);
+	ok1(tally->counts[0] == 2);
+	ok1(tally->counts[1] == 0);
+
+	return exit_status();
+}