Test case for #2262. [t:2262]

git-svn-id: file:///svn/toku/tokudb@16604 c7de825b-a66e-492c-adef-691d508d4ae1

src/tests/isolation.c

+// Test that isolation works right for subtransactions.
+// In particular, check to see what happens if a subtransaction has different isolation level from its parent.
+
+#include "test.h"
+
+const int envflags = DB_INIT_MPOOL|DB_CREATE|DB_THREAD |DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_PRIVATE;
+
+int test_main (int argc, char *argv[]) {
+    parse_args(argc, argv);
+    int r;
+    system("rm -rf " ENVDIR);
+    toku_os_mkdir(ENVDIR, S_IRWXU+S_IRWXG+S_IRWXO);
+    DB_ENV *env;
+    r = db_env_create(&env, 0);                                                         CKERR(r);
+    r = env->open(env, ENVDIR, envflags, S_IRWXU+S_IRWXG+S_IRWXO);                      CKERR(r);
+    
+    DB_TXN *txna;
+    r = env->txn_begin(env, NULL, &txna, 0);                                            CKERR(r);
+    env->set_errfile(env, stderr);
+
+    {
+	DB_TXN *txnb;
+	r = env->txn_begin(env, txna, &txnb, 0);                                        CKERR(r);
+	r = txnb->commit(txnb, 0);                                                      CKERR(r);
+    }
+    {
+	DB_TXN *txnc;
+	r = env->txn_begin(env, txna, &txnc, DB_READ_UNCOMMITTED);                      CKERR(r);
+	r = txnc->commit(txnc, 0);                                                      CKERR(r);
+    }
+
+    
+    return 0;
+}