ntdb: next-generation trivial key-value database

[ccan] / ccan / ntdb / test / api-missing-entries.c

diff --git a/ccan/ntdb/test/api-missing-entries.c b/ccan/ntdb/test/api-missing-entries.c
new file mode 100644 (file)
index 0000000..2a00f1b
--- /dev/null
+++ b/ccan/ntdb/test/api-missing-entries.c
@@ -0,0 +1,42 @@
+/* Another test revealed that we lost an entry.  This reproduces it. */
+#include "config.h"
+#include "ntdb.h"
+#include "private.h"
+#include <ccan/hash/hash.h>
+#include "tap-interface.h"
+#include "logging.h"
+
+#define NUM_RECORDS 1189
+
+/* We use the same seed which we saw this failure on. */
+static uint32_t failhash(const void *key, size_t len, uint32_t seed, void *p)
+{
+       return hash64_stable((const unsigned char *)key, len,
+                            699537674708983027ULL);
+}
+
+int main(int argc, char *argv[])
+{
+       int i;
+       struct ntdb_context *ntdb;
+       NTDB_DATA key = { (unsigned char *)&i, sizeof(i) };
+       NTDB_DATA data = { (unsigned char *)&i, sizeof(i) };
+       union ntdb_attribute hattr = { .hash = { .base = { NTDB_ATTRIBUTE_HASH },
+                                               .fn = failhash } };
+
+       hattr.base.next = &tap_log_attr;
+       plan_tests(1 + NUM_RECORDS + 2);
+
+       ntdb = ntdb_open("run-missing-entries.ntdb", NTDB_INTERNAL,
+                        O_RDWR|O_CREAT|O_TRUNC, 0600, &hattr);
+       if (ok1(ntdb)) {
+               for (i = 0; i < NUM_RECORDS; i++) {
+                       ok1(ntdb_store(ntdb, key, data, NTDB_REPLACE) == 0);
+               }
+               ok1(ntdb_check(ntdb, NULL, NULL) == 0);
+               ntdb_close(ntdb);
+       }
+
+       ok1(tap_log_messages == 0);
+       return exit_status();
+}