content: package com.airhacks.enhydrator.transform;
  
  /*
   * #%L
   * enhydrator
   * %%
   * Copyright (C) 2014 Adam Bien
   * %%
   * Licensed 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.
   * #L%
   */
  import com.airhacks.enhydrator.in.Column;
  import com.airhacks.enhydrator.in.Row;
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertThat;
  import static org.junit.Assert.assertTrue;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   *
   * @author airhacks.com
   */
  public class ExpressionTest {
  
      Expression cut;
  
      @Before
      public void init() {
          this.cut = new Expression();
      }
  
      @Test
      public void bindingsAreWorking() {
          String expression = "print($ROW); print($ROW.numberOfColumns);$ROW";
          Row row = new Row();
          row.addColumn(-1, "chief", "duke");
          row.addColumn(-1, "master", "juggy");
          Row execute = this.cut.execute(row, expression);
          assertFalse(execute.isEmpty());
      }
  
      @Test
      public void emptyList() {
          Row row = new Row();
          row.addColumn(-1, "chief", "duke");
          Row execute = this.cut.execute(row, "$EMPTY");
          assertTrue(execute.isEmpty());
      }
  
      @Test
      public void emptyExpression() {
          Row row = new Row();
          row.addColumn(-1, "chief", "duke");
          Row result = this.cut.execute(row, "");
          assertThat(result, is(row));
      }
  
      @Test
      public void accessToColumn() {
          Row row = new Row();
          final String inputValue = "duke";
          row.addColumn(-1, "chief", inputValue);
          Row result = this.cut.execute(row, "$EMPTY.addColumn(-1,'new_duke',chief.value + '_modified');$EMPTY;");
          Column column = result.getColumnByName("new_duke");
          assertNotNull(column);
          Object value = column.getValue();
          assertNotNull(value);
          assertThat(value, is(inputValue + "_modified"));
      }
  
  }
  