tdb: add test for tdb_summary

ccan/tdb/test/run-summary.c

+#include <ccan/tdb/tdb.h>
+#include <ccan/tdb/io.c>
+#include <ccan/tdb/tdb.c>
+#include <ccan/tdb/lock.c>
+#include <ccan/tdb/freelist.c>
+#include <ccan/tdb/traverse.c>
+#include <ccan/tdb/transaction.c>
+#include <ccan/tdb/error.c>
+#include <ccan/tdb/open.c>
+#include <ccan/tdb/check.c>
+#include <ccan/tdb/hash.c>
+#include <ccan/tdb/summary.c>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+
+int main(int argc, char *argv[])
+{
+	unsigned int i, j;
+	struct tdb_context *tdb;
+	int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
+			TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT,
+			TDB_NOMMAP|TDB_CONVERT };
+	TDB_DATA key = { (unsigned char *)&j, sizeof(j) };
+	TDB_DATA data = { (unsigned char *)&j, sizeof(j) };
+	char *summary;
+
+	plan_tests(sizeof(flags) / sizeof(flags[0]) * 14);
+	for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+		tdb = tdb_open("run-summary.tdb", 131, flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600);
+		ok1(tdb);
+		if (!tdb)
+			continue;
+
+		/* Put some stuff in there. */
+		for (j = 0; j < 500; j++) {
+			/* Make sure padding varies to we get some graphs! */
+			data.dsize = j % (sizeof(j) + 1);
+			if (tdb_store(tdb, key, data, TDB_REPLACE) != 0)
+				fail("Storing in tdb");
+		}
+
+		summary = tdb_summary(tdb);
+		diag("%s", summary);
+		ok1(strstr(summary, "Size of file/data: "));
+		ok1(strstr(summary, "Number of records: 500\n"));
+		ok1(strstr(summary, "Smallest/average/largest keys: 4/4/4\n"));
+		ok1(strstr(summary, "Smallest/average/largest data: 0/2/4\n"));
+		ok1(strstr(summary, "Smallest/average/largest padding: "));
+		ok1(strstr(summary, "Number of dead records: 0\n"));
+		ok1(strstr(summary, "Number of free records: 1\n"));
+		ok1(strstr(summary, "Smallest/average/largest free records: "));
+		ok1(strstr(summary, "Number of hash chains: 131\n"));
+		ok1(strstr(summary, "Smallest/average/largest hash chains: "));
+		ok1(strstr(summary, "Number of uncoalesced records: 0\n"));
+		ok1(strstr(summary, "Smallest/average/largest uncoalesced runs: 0/0/0\n"));
+		ok1(strstr(summary, "Percentage keys/data/padding/free/dead/rechdrs&tailers/hashes: "));
+		
+		free(summary);
+		tdb_close(tdb);
+	}
+
+	return exit_status();
+}