add a test for zero length keys or values

git-svn-id: file:///svn/tokudb@1915 c7de825b-a66e-492c-adef-691d508d4ae1

src/tests/test_zero_length_keys.c

+/* -*- mode: C; c-basic-offset: 4 -*- */
+#ident "Copyright (c) 2007 Tokutek Inc.  All rights reserved."
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <db.h>
+
+#include "test.h"
+#ifndef DIR
+#define DIR "./test.dir"
+#endif
+
+void walk(DB *db) {
+    int r;
+    DB_TXN * const null_txn = 0;
+
+    DBC *cursor;
+    r = db->cursor(db, null_txn, &cursor, 0); assert(r == 0);
+
+    DBT key; memset(&key, 0, sizeof key); key.flags = DB_DBT_REALLOC;
+    DBT val; memset(&val, 0, sizeof val); val.flags = DB_DBT_REALLOC;
+    int i;
+    for (i=0; ; i++) {
+        r = cursor->c_get(cursor, &key, &val, DB_NEXT);
+        if (r != 0) 
+            break;
+        if (verbose) printf("%d %d %d\n", i, key.size, val.size);
+        if (i == 0) assert(key.size == 0);
+    }
+    assert(i != 0);
+    r = cursor->c_close(cursor); assert(r == 0);
+
+    if (key.data) free(key.data);
+    if (val.data) free(val.data);
+}
+
+void test_insert_zero_length(int n, int dup_mode) {
+    if (verbose) printf("test_insert_zero_length:%d %d\n", n, dup_mode);
+
+    DB_ENV * const null_env = 0;
+    DB *db;
+    DB_TXN * const null_txn = 0;
+    const char * const fname = DIR "/" "test_insert.brt";
+    int r;
+
+    unlink(fname);
+
+    /* create the dup database file */
+    r = db_create(&db, null_env, 0); assert(r == 0);
+    r = db->set_flags(db, dup_mode); assert(r == 0);
+    r = db->set_pagesize(db, 4096); assert(r == 0);
+    r = db->open(db, null_txn, fname, "main", DB_BTREE, DB_CREATE, 0666); assert(r == 0);
+
+    int i;
+    for (i=0; i<n; i++) {
+        char k[n]; memset(k, i, n);
+        char v[n]; memset(v, i, n);
+        DBT key;
+        DBT val;
+        r = db->put(db, null_txn, dbt_init(&key, &k, i), dbt_init(&val, &v, i), 0);
+        if (r != 0) {
+            if (verbose) printf("db->put %d %d = %d\n", n, n, r);
+            assert(r == 0);
+        }
+    }
+
+    walk(db);
+
+    r = db->close(db, 0); assert(r == 0);
+}
+
+void test_insert_zero_length_keys(int n, int dup_mode) {
+    if (verbose) printf("test_insert_zero_length_keys:%d %d\n", n, dup_mode);
+
+    DB_ENV * const null_env = 0;
+    DB *db;
+    DB_TXN * const null_txn = 0;
+    const char * const fname = DIR "/" "test_insert.brt";
+    int r;
+
+    unlink(fname);
+
+    /* create the dup database file */
+    r = db_create(&db, null_env, 0); assert(r == 0);
+    r = db->set_flags(db, dup_mode); assert(r == 0);
+    r = db->set_pagesize(db, 4096); assert(r == 0);
+    r = db->open(db, null_txn, fname, "main", DB_BTREE, DB_CREATE, 0666); assert(r == 0);
+
+    int i;
+    for (i=0; i<n; i++) {
+        char k[n]; memset(k, i, n);
+        char v[n]; memset(v, i, n);
+        DBT key;
+        DBT val;
+        r = db->put(db, null_txn, dbt_init(&key, &k, 0), dbt_init(&val, &v, i), DB_YESOVERWRITE);
+        if (r != 0) {
+            if (verbose) printf("db->put %d %d = %d\n", n, n, r);
+            assert(r == 0);
+        }
+    }
+
+    walk(db);
+
+    r = db->close(db, 0); assert(r == 0);
+}
+
+int main(int argc, const char *argv[]) {
+
+    parse_args(argc, argv);
+  
+    system("rm -rf " DIR);
+    mkdir(DIR, 0777);
+
+    test_insert_zero_length(32, 0);
+    test_insert_zero_length_keys(32, 0);
+    test_insert_zero_length_keys(32, DB_DUP+DB_DUPSORT);
+
+    return 0;
+}