/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.optimizer.relational;
import org.teiid.query.optimizer.relational.OptimizerRule;
import org.teiid.query.optimizer.relational.RuleStack;
import org.teiid.query.optimizer.relational.rules.RuleConstants;
import org.teiid.query.optimizer.relational.rules.RulePushSelectCriteria;
import junit.framework.TestCase;
/**
*/
public class TestRuleStack extends TestCase {
/**
* Constructor for TestRuleStack.
* @param arg0
*/
public TestRuleStack(String arg0) {
super(arg0);
}
public void testInitialization() {
RuleStack stack = new RuleStack();
assertEquals("Initial stack is not empty", true, stack.isEmpty()); //$NON-NLS-1$
assertEquals("Initial size is not 0", 0, stack.size()); //$NON-NLS-1$
assertNull("Top is not null", stack.pop()); //$NON-NLS-1$
}
public void helpTestPop(RuleStack stack, OptimizerRule expectedPop, int expectedSize) {
OptimizerRule out = stack.pop();
int outSize = stack.size();
assertSame("Did not get same object", expectedPop, out); //$NON-NLS-1$
assertEquals("Stack changed size", expectedSize, outSize); //$NON-NLS-1$
}
public void testPopOneRule() {
RuleStack stack = new RuleStack();
int expectedSize = stack.size();
OptimizerRule rule = new RulePushSelectCriteria();
stack.push(rule);
helpTestPop(stack, rule, expectedSize);
}
public void testPopNothing() {
RuleStack stack = new RuleStack();
helpTestPop(stack, null, 0);
}
public void testRemove() {
// Set up
RuleStack stack = new RuleStack();
stack.push(RuleConstants.ASSIGN_OUTPUT_ELEMENTS);
stack.push(RuleConstants.COLLAPSE_SOURCE);
stack.push(RuleConstants.ASSIGN_OUTPUT_ELEMENTS);
// Remove all instances of ASSIGN_OUTPUT_ELEMENTS
stack.remove(RuleConstants.ASSIGN_OUTPUT_ELEMENTS);
// Verify size and pop'ed values
assertEquals(1, stack.size());
assertEquals(RuleConstants.COLLAPSE_SOURCE, stack.pop());
assertEquals(null, stack.pop());
}
public void testContains() {
// Set up
RuleStack stack = new RuleStack();
stack.push(RuleConstants.ASSIGN_OUTPUT_ELEMENTS);
stack.push(RuleConstants.COLLAPSE_SOURCE);
assertEquals(true, stack.contains(RuleConstants.ASSIGN_OUTPUT_ELEMENTS));
assertEquals(false, stack.contains(RuleConstants.PLACE_ACCESS));
}
}