/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#include <dmlc/logging.h>
#include <gtest/gtest.h>
#include <tvm/ir_visitor.h>
#include <tvm/ir_pass.h>

TEST(IRVisitor, CountVar) {
  using namespace tvm;
  int n_var = 0;
  Var x("x"), y;

  auto z = x + 1 + y + y;
  ir::PostOrderVisit(z, [&n_var](const NodeRef& n) {
      if (n.as<Variable>()) ++n_var;
    });
  CHECK_EQ(n_var, 2);
}

int main(int argc, char ** argv) {
  testing::InitGoogleTest(&argc, argv);
  testing::FLAGS_gtest_death_test_style = "threadsafe";
  return RUN_ALL_TESTS();
}