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Event-driven lists for dynamically filtered and sorted tables
/* Glazed Lists (c) 2003-2006 */
/* http://publicobject.com/glazedlists/ publicobject.com,*/
/* O'Dell Engineering Ltd.*/
package ca.odell.glazedlists;
import ca.odell.glazedlists.impl.testing.GlazedListsTests;
import junit.framework.TestCase;
import java.util.List;
public class TransactionListTest extends TestCase {
private EventList source;
private TransactionList txList;
private GlazedListsTests.ListEventCounter counter;
protected void setUp() {
source = new BasicEventList();
txList = new TransactionList(source);
counter = new GlazedListsTests.ListEventCounter();
txList.addListEventListener(counter);
}
protected void tearDown() {
txList.removeListEventListener(counter);
txList.dispose();
counter = null;
txList = null;
source = null;
}
public void testRollbackSimpleListEvent() {
assertState(GlazedListsTests.stringToList(""), 0);
// 1. rollback simple add
txList.beginEvent();
txList.add("0");
assertState(GlazedListsTests.stringToList("0"), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList(""), 0);
source.add("0");
assertEquals(1, counter.getCountAndReset());
// 2. rollback simple remove
txList.beginEvent();
assertState(GlazedListsTests.stringToList("0"), 0);
txList.remove(0);
assertState(GlazedListsTests.stringToList(""), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList("0"), 0);
// 3. rollback simple update
txList.beginEvent();
assertState(GlazedListsTests.stringToList("0"), 0);
txList.set(0, "1");
assertState(GlazedListsTests.stringToList("1"), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList("0"), 0);
}
public void testRollbackComplexListEvent() {
source.addAll(GlazedListsTests.stringToList("ABC"));
assertState(GlazedListsTests.stringToList("ABC"), 1);
// 1. rollback add, remove, set as a single transaction
txList.beginEvent();
txList.add("D");
txList.remove(1);
txList.set(0, "B");
assertState(GlazedListsTests.stringToList("BCD"), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList("ABC"), 0);
}
public void testCommitComplex() {
source.addAll(GlazedListsTests.stringToList("ABC"));
assertState(GlazedListsTests.stringToList("ABC"), 1);
// 1. commit add, remove, set as a single transaction
txList.beginEvent();
txList.add("D");
txList.remove(1);
txList.set(0, "B");
assertState(GlazedListsTests.stringToList("BCD"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("BCD"), 1);
}
/**
* If a transaction is "buffered" it accumulates all ListEvents during the
* transaction into a single uber-ListEvent and fires it on commit.
*/
public void testCommitOnBufferedTransactionFiresEvent() {
assertState(GlazedListsTests.stringToList(""), 0);
// 1. commit should fire a single ListEvent
txList.beginEvent(true);
txList.add("A");
txList.add("B");
assertState(GlazedListsTests.stringToList("AB"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("AB"), 1);
// 2. do it again to ensure that the txList is still usable
txList.beginEvent(true);
txList.add("C");
txList.add("D");
assertState(GlazedListsTests.stringToList("ABCD"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("ABCD"), 1);
}
/**
* If a transaction is "buffered" it accumulates all ListEvents during the
* transaction into a single uber-ListEvent and thus fires no event on rollback.
*/
public void testRollbackOnBufferedTransactionFiresNoEvent() {
assertState(GlazedListsTests.stringToList(""), 0);
// 1. rollback should no ListEvent
txList.beginEvent(true);
txList.add("A");
txList.add("B");
assertState(GlazedListsTests.stringToList("AB"), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList(""), 0);
// 2. do it again to ensure that the txList is still usable
txList.beginEvent(true);
txList.add("C");
txList.add("D");
assertState(GlazedListsTests.stringToList("CD"), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList(""), 0);
}
/**
* If a transaction is "live" it forwards all ListEvents as they are
* received and thus no ListEvent is fired on commit.
*/
public void testCommitOnLiveTransactionFiresNoEvent() {
assertState(GlazedListsTests.stringToList(""), 0);
// 1. commit should fire no ListEvent
txList.beginEvent(false);
txList.add("A");
txList.add("B");
assertState(GlazedListsTests.stringToList("AB"), 2);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("AB"), 0);
// 2. do it again to ensure that the txList is still usable
txList.beginEvent(false);
txList.add("C");
txList.add("D");
assertState(GlazedListsTests.stringToList("ABCD"), 2);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("ABCD"), 0);
}
/**
* If a transaction is "live" it forwards all ListEvents as they are
* received and thus a ListEvent must be fired on rollback.
*/
public void testRollbackOnLiveTransactionFiresEvent() {
assertState(GlazedListsTests.stringToList(""), 0);
// 1. rollback should fire ListEvent
txList.beginEvent(false);
txList.add("A");
txList.add("B");
assertState(GlazedListsTests.stringToList("AB"), 2);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList(""), 1);
// 2. do it again to ensure that the txList is still usable
txList.beginEvent(false);
txList.add("C");
txList.add("D");
assertState(GlazedListsTests.stringToList("CD"), 2);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList(""), 1);
}
public void testDoubleBegin() {
txList.beginEvent();
try {
txList.beginEvent();
} catch (IllegalStateException e) {
assertEquals("Unable to begin a new transaction before committing or rolling back the previous transaction", e.getMessage());
}
}
public void testCommitNothing() {
try {
txList.commitEvent();
} catch (IllegalStateException e) {
assertEquals("No ListEvent exists to commit", e.getMessage());
}
}
public void testRollbackNothing() {
try {
txList.rollbackEvent();
} catch (IllegalStateException e) {
assertEquals("No ListEvent exists to roll back", e.getMessage());
}
}
public void testNoRollbackSupport() {
source = new BasicEventList();
txList = new TransactionList(source, false);
counter = new GlazedListsTests.ListEventCounter();
txList.addListEventListener(counter);
txList.beginEvent();
try {
txList.rollbackEvent();
} catch (IllegalStateException e) {
assertEquals("This TransactionList does not support rollback", e.getMessage());
}
}
public void testRollbackNestedTransactions() {
txList.beginEvent(false);
txList.add("A");
txList.add("B");
assertState(GlazedListsTests.stringToList("AB"), 2);
// nest a transaction that does delay its events
txList.beginEvent(true);
txList.add("C");
txList.add("D");
assertState(GlazedListsTests.stringToList("ABCD"), 0);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList("AB"), 0);
// nest a transaction that does not delay its events
txList.beginEvent(false);
txList.add("E");
txList.add("F");
assertState(GlazedListsTests.stringToList("ABEF"), 2);
txList.rollbackEvent();
assertState(GlazedListsTests.stringToList("AB"), 1);
txList.add("G");
txList.add("H");
assertState(GlazedListsTests.stringToList("ABGH"), 2);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("ABGH"), 0);
}
public void testCommitNestedTransactions() {
txList.beginEvent(true);
txList.add("A");
txList.add("B");
assertState(GlazedListsTests.stringToList("AB"), 0);
// nest a transaction that does delay its events
txList.beginEvent(true);
txList.add("C");
txList.add("D");
assertState(GlazedListsTests.stringToList("ABCD"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("ABCD"), 0);
// nest a transaction that does not delay its events
txList.beginEvent(false);
txList.add("E");
txList.add("F");
assertState(GlazedListsTests.stringToList("ABCDEF"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("ABCDEF"), 0);
txList.add("G");
txList.add("H");
assertState(GlazedListsTests.stringToList("ABCDEFGH"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("ABCDEFGH"), 1);
}
public void testIgnoreChangesOutsideOfTransaction() {
txList.add("A");
assertState(GlazedListsTests.stringToList("A"), 1);
txList.set(0, "B");
assertState(GlazedListsTests.stringToList("B"), 1);
txList.beginEvent();
txList.add("C");
assertState(GlazedListsTests.stringToList("BC"), 0);
txList.commitEvent();
assertState(GlazedListsTests.stringToList("BC"), 1);
txList.add("D");
assertState(GlazedListsTests.stringToList("BCD"), 1);
}
private void assertState(List expected, int numEvents) {
assertEquals(expected, source);
assertEquals(expected, txList);
assertEquals(numEvents, counter.getCountAndReset());
}
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