1 files changed, 87 insertions, 0 deletions
diff --git a/lib/ccan/likely/test/run-debug.c b/lib/ccan/likely/test/run-debug.c
new file mode 100644
index 0000000000..df78619271
--- /dev/null
+++ b/lib/ccan/likely/test/run-debug.c
@@ -0,0 +1,87 @@
+#define CCAN_LIKELY_DEBUG 1
+#include <ccan/likely/likely.c>
+#include <ccan/likely/likely.h>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+
+static bool one_seems_likely(unsigned int val)
+{
+	if (likely(val == 1))
+		return true;
+	return false;
+}
+
+static bool one_seems_unlikely(unsigned int val)
+{
+	if (unlikely(val == 1))
+		return true;
+	return false;
+}
+
+static bool likely_one_unlikely_two(unsigned int val1, unsigned int val2)
+{
+	/* Same line, check we don't get confused! */
+	if (likely(val1 == 1) && unlikely(val2 == 2))
+		return true;
+	return false;
+}
+
+int main(int argc, char *argv[])
+{
+	const char *bad;
+
+	plan_tests(13);
+
+	/* Correct guesses. */
+	one_seems_likely(1);
+	ok1(likely_stats(0, 90) == NULL);
+	one_seems_unlikely(2);
+	ok1(likely_stats(0, 90) == NULL);
+
+	/* Incorrect guesses. */
+	one_seems_likely(0);
+	one_seems_likely(2);
+	/* Hasn't been hit 4 times, so this fails */
+	ok1(!likely_stats(4, 90));
+	bad = likely_stats(3, 90);
+	ok(strends(bad, "run-debug.c:9:likely(val == 1) correct 33% (1/3)"),
+	   "likely_stats returned %s", bad);
+
+	/* Nothing else above 90% */
+	ok1(!likely_stats(0, 90));
+
+	/* This should get everything. */
+	bad = likely_stats(0, 100);
+	ok(strends(bad, "run-debug.c:16:unlikely(val == 1) correct 100% (1/1)"),
+	   "likely_stats returned %s", bad);
+
+	/* Nothing left (table is actually cleared) */
+	ok1(!likely_stats(0, 100));
+
+	/* Make sure unlikely works */
+	one_seems_unlikely(0);
+	one_seems_unlikely(2);
+	one_seems_unlikely(1);
+
+	bad = likely_stats(0, 90);
+	ok(strends(bad, "run-debug.c:16:unlikely(val == 1) correct 66% (2/3)"),
+	   "likely_stats returned %s", bad);
+	ok1(!likely_stats(0, 100));
+
+	likely_one_unlikely_two(1, 1);
+	likely_one_unlikely_two(1, 1);
+	likely_one_unlikely_two(1, 1);
+	ok1(!likely_stats(0, 90));
+	likely_one_unlikely_two(1, 2);
+
+	bad = likely_stats(0, 90);
+	ok(strends(bad, "run-debug.c:24:unlikely(val2 == 2) correct 75% (3/4)"),
+	   "likely_stats returned %s", bad);
+	bad = likely_stats(0, 100);
+	ok(strends(bad, "run-debug.c:24:likely(val1 == 1) correct 100% (4/4)"),
+	   "likely_stats returned %s", bad);
+
+	ok1(!likely_stats(0, 100));
+
+	exit(exit_status());
+}