test DB_NOTFOUND and c++ exceptions. closes #362

git-svn-id: file:///svn/tokudb@2223 c7de825b-a66e-492c-adef-691d508d4ae1

cxx/tests/test_get_not_found.cpp

+/* This test ensures that a db->get DB_NOTFOUND does not cause an
+   exception when exceptions are enabled, which is consistent with
+   Berkeley DB */
+
+#include <db_cxx.h>
+#include <assert.h>
+
+const char *test_file_name = "test_get_not_found.tdb";
+
+void db_put(Db *db, int k, int v) {
+    Dbt key(&k, sizeof k);
+    Dbt val(&v, sizeof v);
+    int r = db->put(0, &key, &val, 0); 
+    assert(r == 0);
+}
+
+void db_del(Db *db, int k) {
+    Dbt key(&k, sizeof k);
+    int r = db->del(0, &key, 0); 
+    assert(r == 0);
+}
+
+void db_get(Db *db, int k, int v, int expectr) {
+    Dbt key(&k, sizeof k);
+    Dbt val; val.set_data(&v);  val.set_ulen(sizeof v); val.set_flags(DB_DBT_USERMEM);
+    int r = db->get(0, &key, &val, 0); 
+    assert(r == expectr);
+    if (r == 0) {
+        assert(val.get_size() == sizeof v);
+        int vv;
+        memcpy(&vv, val.get_data(), val.get_size());
+        assert(vv == v);
+    }
+}
+
+void test_not_found() {
+    int r;
+
+    unlink(test_file_name);
+    Db *db = new Db(0, DB_CXX_NO_EXCEPTIONS); assert(db);
+    r = db->open(0, test_file_name, 0, DB_BTREE, DB_CREATE, 0777); assert(r == 0);
+    db_put(db, 1, 2);
+    db_get(db, 1, 2, 0);
+    db_del(db, 1);
+    db_get(db, 1, 0, DB_NOTFOUND);
+    r = db->close(0); assert(r == 0);
+    delete db;
+}
+
+void test_exception_not_found() {
+    int r;
+    
+    unlink(test_file_name);
+    Db *db = new Db(0, 0); assert(db);
+    r = db->open(0, test_file_name, 0, DB_BTREE, DB_CREATE, 0777); assert(r == 0);
+    db_put(db, 1, 2);
+    db_get(db, 1, 2, 0);
+    db_del(db, 1);
+    try {
+        db_get(db, 1, 0, DB_NOTFOUND);
+    } catch(...) {
+        assert(0);
+    }
+    r = db->close(0); assert(r == 0);
+    delete db;
+}
+
+int main(int argc, char *argv[]) {
+    test_not_found();
+    test_exception_not_found();
+    return 0;
+}