+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tap/tap.h>
+#include "logging.h"
+
+/* We rig the hash so adjacent-numbered records always clash. */
+static uint64_t clash(const void *key, size_t len, uint64_t seed, void *priv)
+{
+ return *(unsigned int *)key / 2;
+}
+
+static void test_val(struct tdb_context *tdb, unsigned int val)
+{
+ unsigned int v;
+ struct tdb_data key = { (unsigned char *)&v, sizeof(v) };
+ struct tdb_data data = { (unsigned char *)&v, sizeof(v) };
+
+ /* Insert an entry, then delete it. */
+ v = val;
+ /* Delete should fail. */
+ ok1(tdb_delete(tdb, key) == -1);
+ ok1(tdb_error(tdb) == TDB_ERR_NOEXIST);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Insert should succeed. */
+ ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Delete should succeed. */
+ ok1(tdb_delete(tdb, key) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Re-add it, then add collision. */
+ ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+ v = val + 1;
+ ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Can find both? */
+ ok1(tdb_fetch(tdb, key).dsize == data.dsize);
+ v = val;
+ ok1(tdb_fetch(tdb, key).dsize == data.dsize);
+
+ /* Delete second one. */
+ v = val + 1;
+ ok1(tdb_delete(tdb, key) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Re-add */
+ ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Now, try deleting first one. */
+ v = val;
+ ok1(tdb_delete(tdb, key) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+
+ /* Can still find second? */
+ v = val + 1;
+ ok1(tdb_fetch(tdb, key).dsize == data.dsize);
+
+ /* Delete that, so we are empty. */
+ ok1(tdb_delete(tdb, key) == 0);
+ ok1(tdb_check(tdb, NULL, NULL) == 0);
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i;
+ struct tdb_context *tdb;
+ union tdb_attribute hattr = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
+ .hash_fn = clash } };
+ int flags[] = { TDB_INTERNAL, TDB_DEFAULT,
+ TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT };
+
+ hattr.base.next = &tap_log_attr;
+
+ plan_tests(sizeof(flags) / sizeof(flags[0]) * 44 + 1);
+ for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+ tdb = tdb_open("run-delete.tdb", flags[i],
+ O_RDWR|O_CREAT|O_TRUNC, 0600, &hattr);
+ ok1(tdb);
+ if (!tdb)
+ continue;
+
+ /* Check start of hash table. */
+ test_val(tdb, 0);
+
+ /* Check end of hash table (will wrap around!). */
+ test_val(tdb, ((1 << tdb->header.v.hash_bits) - 1) * 2);
+
+ ok1(!tdb_has_locks(tdb));
+ tdb_close(tdb);
+ }
+
+ ok1(tap_log_messages == 0);
+ return exit_status();
+}