/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.pig.parser;
import java.io.IOException;
import junit.framework.Assert;
import org.antlr.runtime.CharStream;
import org.antlr.runtime.CommonTokenStream;
import org.antlr.runtime.RecognitionException;
import org.antlr.runtime.tree.CommonTree;
import org.antlr.runtime.tree.CommonTreeNodeStream;
import org.antlr.runtime.tree.Tree;
import org.junit.Test;
public class TestAstValidator {
/**
* Verify if default data type is inserted.
*/
@Test
public void testDefaultDataTypeInsertion() throws IOException, RecognitionException {
CharStream input = new QueryParserFileStream( "test/org/apache/pig/parser/TestDefaultDataTypeInserter.pig" );
QueryLexer lex = new QueryLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lex);
QueryParser parser = QueryParserUtils.createParser(tokens);
QueryParser.query_return result = parser.query();
Tree ast = (Tree)result.getTree();
System.out.println( ast.toStringTree() );
TreePrinter.printTree( (CommonTree)ast, 0 );
CommonTreeNodeStream nodes = new CommonTreeNodeStream( ast );
AstValidator walker = new AstValidator( nodes );
AstValidator.query_return newResult = walker.query();
Assert.assertEquals( 0, walker.getNumberOfSyntaxErrors() );
ast = (Tree)newResult.getTree();
validateDataTypePresent( (CommonTree)ast );
TreePrinter.printTree( (CommonTree)ast, 0 );
}
private void validateDataTypePresent(CommonTree tree) {
if( tree != null ) {
if( tree.getText().equals( "TUPLE_DEF" ) ) {
for ( int i = 0; i < tree.getChildCount(); i++ ) {
CommonTree child = (CommonTree)tree.getChild( i ); // FIELD node
Assert.assertTrue( "FIELD_DEF".equals( child.getText() ) );
CommonTree datatype = (CommonTree)child.getChild( 1 );
Assert.assertTrue( datatype != null );
String typeName = datatype.getText();
Assert.assertTrue( !typeName.isEmpty() );
validateDataTypePresent( child );
}
} else {
for ( int i = 0; i < tree.getChildCount(); i++ ) {
validateDataTypePresent( (CommonTree)tree.getChild( i ) );
}
}
}
}
/**
* Validate if alias name duplication is caught.
*/
@Test
public void tesNegative1() throws RecognitionException, IOException {
try {
ParserTestingUtils.validateAst( "A = load 'x' as ( u:int, v:long, u:chararray, w:bytearray );" );
} catch(Exception ex) {
Assert.assertTrue( ex instanceof DuplicatedSchemaAliasException );
return;
}
Assert.fail( "Testcase should fail" );
}
/**
* Validate if alias name duplication is caught. Slightly more complicated than above test case.
*/
@Test
public void tesNegative2() throws RecognitionException, IOException {
try {
ParserTestingUtils.validateAst( "A = load 'x' as ( u:int, v:long, w:tuple( w:long, u:chararray, w:bytearray) );" );
} catch(Exception ex) {
Assert.assertTrue( ex instanceof DuplicatedSchemaAliasException );
return;
}
Assert.fail( "Testcase should fail" );
}
@Test
public void tesNegative3() throws RecognitionException, IOException {
try {
ParserTestingUtils.validateAst( "A = load 'x'; C = limit B 100;" );
} catch(Exception ex) {
Assert.assertTrue( ex instanceof UndefinedAliasException );
return;
}
Assert.fail( "Testcase should fail" );
}
// TODO: need a test similar to above but for foreach inner plan.
@Test
public void testMultilineFunctionArgument() throws RecognitionException, ParsingFailureException, IOException {
String query = "LOAD 'testIn' \n" +
"USING PigStorage ('\n');";
ParserTestingUtils.validateAst(query);
}
}