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  package org.apache.cayenne.exp.parser;
  
  import org.apache.cayenne.exp.Expression;
  import org.apache.cayenne.exp.ExpressionFactory;
  import org.apache.cayenne.testdo.table_primitives.TablePrimitives;
  import org.junit.Test;
  
  import static org.junit.Assert.*;
  
  /**
   * @since 4.0
   */
  public class ASTSqrtTest {
      @Test
      public void evaluateNode() throws Exception {
          ASTObjPath path = new ASTObjPath("intColumn");
          ASTSqrt abs = new ASTSqrt(path);
  
          TablePrimitives a = new TablePrimitives();
          a.setIntColumn(9);
  
          Object res = abs.evaluateNode(a);
          assertTrue(res instanceof Double);
          assertEquals(3.0, res);
      }
  
      @Test
      public void parseTest() throws Exception {
          String expString = "sqrt(xyz)";
          Expression exp = ExpressionFactory.exp(expString);
  
          assertTrue(exp instanceof ASTSqrt);
          String toString = exp.toString();
          assertEquals(expString, toString);
      }
  }