1 files changed, 70 insertions, 0 deletions
diff --git a/lib/tdb2/test/run-features.c b/lib/tdb2/test/run-features.c
new file mode 100644
index 0000000000..6d82dc308c
--- /dev/null
+++ b/lib/tdb2/test/run-features.c
@@ -0,0 +1,70 @@
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/hash.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tdb2/summary.c>
+#include <ccan/tdb2/transaction.c>
+#include <ccan/tap/tap.h>
+#include "logging.h"
+
+int main(int argc, char *argv[])
+{
+	unsigned int i, j;
+	struct tdb_context *tdb;
+	int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
+			TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT };
+	struct tdb_data key = { (unsigned char *)&j, sizeof(j) };
+	struct tdb_data data = { (unsigned char *)&j, sizeof(j) };
+
+	plan_tests(sizeof(flags) / sizeof(flags[0]) * 8 + 1);
+	for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+		uint64_t features;
+		tdb = tdb_open("run-features.tdb", flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
+		ok1(tdb);
+		if (!tdb)
+			continue;
+
+		/* Put some stuff in there. */
+		for (j = 0; j < 100; j++) {
+			if (tdb_store(tdb, key, data, TDB_REPLACE) != 0)
+				fail("Storing in tdb");
+		}
+
+		/* Mess with features fields in hdr. */
+		features = (~TDB_FEATURE_MASK ^ 1);
+		ok1(tdb_write_convert(tdb, offsetof(struct tdb_header,
+						    features_used),
+				      &features, sizeof(features)) == 0);
+		ok1(tdb_write_convert(tdb, offsetof(struct tdb_header,
+						    features_offered),
+				      &features, sizeof(features)) == 0);
+		tdb_close(tdb);
+
+		tdb = tdb_open("run-features.tdb", flags[i], O_RDWR, 0,
+			       &tap_log_attr);
+		ok1(tdb);
+		if (!tdb)
+			continue;
+
+		/* Should not have changed features offered. */
+		ok1(tdb_read_convert(tdb, offsetof(struct tdb_header,
+						   features_offered),
+				     &features, sizeof(features)) == 0);
+		ok1(features == (~TDB_FEATURE_MASK ^ 1));
+
+		/* Should have cleared unknown bits in features_used. */
+		ok1(tdb_read_convert(tdb, offsetof(struct tdb_header,
+						   features_used),
+				     &features, sizeof(features)) == 0);
+		ok1(features == (1 & TDB_FEATURE_MASK));
+
+		tdb_close(tdb);
+	}
+
+	ok1(tap_log_messages == 0);
+	return exit_status();
+}