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  package org.apache.cayenne.exp.parser;
  
  import org.apache.cayenne.exp.Expression;
  import org.apache.cayenne.exp.ExpressionFactory;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  public class ASTNotExistsTest {
  
      @Test
      public void parseSinglePath() {
          Expression exp = ExpressionFactory.exp("not exists a");
          assertTrue(exp instanceof ASTNotExists);
          SimpleNode node = (SimpleNode) exp;
          assertEquals("a", node.jjtGetChild(0).toString());
      }
  
      @Test
      public void parseLongPath() {
          Expression exp = ExpressionFactory.exp("not exists a.b.c");
          assertTrue(exp instanceof ASTNotExists);
          SimpleNode node = (SimpleNode) exp;
          assertEquals("a.b.c", node.jjtGetChild(0).toString());
      }
  
      @Test
      public void parseLongDbPath() {
          Expression exp = ExpressionFactory.exp("not exists db:a.b.c");
          assertTrue(exp instanceof ASTNotExists);
          SimpleNode node = (SimpleNode) exp;
          assertEquals("db:a.b.c", node.jjtGetChild(0).toString());
      }
  
      @Test
      public void parseCondition() {
          Expression exp = ExpressionFactory.exp("not exists a > 5");
          assertTrue(exp instanceof ASTNotExists);
          SimpleNode node = (SimpleNode) exp;
          assertEquals("(a > 5)", node.jjtGetChild(0).toString());
      }
  
      @Test
      public void parseFunction() {
          Expression exp = ExpressionFactory.exp("not exists length(a) <= 5");
          assertTrue(exp instanceof ASTNotExists);
          SimpleNode node = (SimpleNode) exp;
          assertEquals("(length(a) <= 5)", node.jjtGetChild(0).toString());
      }
  
  }