/*
 * Copyright 2020 Confluent Inc.
 *
 * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations under the License.
 */

package io.confluent.ksql.parser.tree;

import static io.confluent.ksql.schema.ksql.SystemColumns.WINDOWSTART_NAME;
import static java.util.Optional.of;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertThrows;

import io.confluent.ksql.execution.expression.tree.Expression;
import io.confluent.ksql.execution.expression.tree.StringLiteral;
import io.confluent.ksql.parser.NodeLocation;
import io.confluent.ksql.parser.exception.ParseFailedException;
import java.util.Optional;
import org.junit.Test;

public class SingleColumnTest {

  private static final Optional<NodeLocation> A_LOCATION = Optional.empty();
  private static final Expression AN_EXPRESSION = new StringLiteral("foo");

  @Test
  public void shouldThrowIfAliasIsSystemColumnName() {
    // When:
    final Exception e = assertThrows(
        ParseFailedException.class,
        () -> new SingleColumn(A_LOCATION, AN_EXPRESSION, of(WINDOWSTART_NAME))
    );

    // Then:
    assertThat(e.getMessage(), containsString("is a reserved system column name."));
  }
}