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   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
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  package org.apache.cayenne.exp.parser;
  
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  
  public class ExpressionUtilsTest {
  
      @Test
      public void testParsePath() throws ParseException {
          ASTPath path = new ASTObjPath();
          ExpressionUtils.parsePath(path, "a.b.c.d");
  
          assertEquals("a.b.c.d", path.getPath().value());
          assertEquals(0, path.getPathAliases().size());
      }
  
      @Test
      public void testParsePathOuterJoin() throws ParseException {
          ASTPath path = new ASTObjPath();
          ExpressionUtils.parsePath(path, "a.b+.c+.d");
  
          assertEquals("a.b+.c+.d", path.getPath().value());
          assertEquals(0, path.getPathAliases().size());
      }
  
      @Test
      public void testParsePathWithAlias() throws ParseException {
          ASTPath path = new ASTObjPath();
          ExpressionUtils.parsePath(path, "a.b.c#p1.d#p2");
  
          assertEquals("a.b.p1.p2", path.getPath().value());
          assertEquals(2, path.getPathAliases().size());
          assertEquals("c", path.getPathAliases().get("p1"));
          assertEquals("d", path.getPathAliases().get("p2"));
      }
  
      @Test
      public void testParsePathWithAliasAndOuterJoin() throws ParseException {
          ASTPath path = new ASTObjPath();
          ExpressionUtils.parsePath(path, "a.b+.c#p1+.d#p2");
  
          assertEquals("a.b+.p1.p2", path.getPath().value());
          assertEquals(2, path.getPathAliases().size());
          assertEquals("c+", path.getPathAliases().get("p1"));
          assertEquals("d", path.getPathAliases().get("p2"));
      }
  
      @Test(expected = ParseException.class)
      public void testParseInvalidPath() throws ParseException {
          ASTPath path = new ASTObjPath();
          ExpressionUtils.parsePath(path, "a.b.c#p1.d#p1");
      }
  }