/*
* 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.harmony.luni.tests.java.util;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
public class TimerTest extends junit.framework.TestCase {
int timerCounter = 0;
Object sync = new Object();
/**
* Warning: These tests have the possibility to leave a VM hanging if the
* Timer is not cancelled.
*/
class TimerTestTask extends TimerTask {
int wasRun = 0;
// Should we sleep for 200 ms each run()?
boolean sleepInRun = false;
// Should we increment the timerCounter?
boolean incrementCount = false;
// Should we terminate the timer at a specific timerCounter?
int terminateCount = -1;
// The timer we belong to
Timer timer = null;
public TimerTestTask() {
}
public TimerTestTask(Timer t) {
timer = t;
}
public void run() {
synchronized (this) {
wasRun++;
}
if (incrementCount)
timerCounter++;
if (terminateCount == timerCounter && timer != null)
timer.cancel();
if (sleepInRun) {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
}
synchronized (sync) {
sync.notify();
}
}
public synchronized int wasRun() {
return wasRun;
}
public void sleepInRun(boolean sleepInRun) {
this.sleepInRun = sleepInRun;
}
public void incrementCount(boolean incrementCount) {
this.incrementCount = incrementCount;
}
public void terminateCount(int terminateCount) {
this.terminateCount = terminateCount;
}
}
/**
* @tests java.util.Timer#Timer(boolean)
*/
public void test_ConstructorZ() {
Timer t = null;
try {
// Ensure a task is run
t = new Timer(true);
TimerTestTask testTask = new TimerTestTask();
t.schedule(testTask, 200);
synchronized (sync) {
try {
sync.wait(1000);
} catch (InterruptedException e) {
}
}
assertEquals("TimerTask.run() method not called after 200ms",
1, testTask.wasRun());
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#Timer()
*/
public void test_Constructor() {
Timer t = null;
try {
// Ensure a task is run
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
t.schedule(testTask, 200);
synchronized (sync) {
try {
sync.wait(1000);
} catch (InterruptedException e) {
}
}
assertEquals("TimerTask.run() method not called after 200ms",
1, testTask.wasRun());
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#Timer(String, boolean)
*/
public void test_ConstructorSZ() {
Timer t = null;
try {
// Ensure a task is run
t = new Timer("test_ConstructorSZThread", true);
TimerTestTask testTask = new TimerTestTask();
t.schedule(testTask, 200);
synchronized (sync) {
try {
sync.wait(1000);
} catch (InterruptedException e) {}
}
assertEquals("TimerTask.run() method not called after 200ms", 1,
testTask.wasRun());
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#Timer(String)
*/
public void test_ConstructorS() {
Timer t = null;
try {
// Ensure a task is run
t = new Timer("test_ConstructorSThread");
TimerTestTask testTask = new TimerTestTask();
t.schedule(testTask, 200);
synchronized (sync) {
try {
sync.wait(1000);
} catch (InterruptedException e) {}
}
assertEquals("TimerTask.run() method not called after 200ms", 1,
testTask.wasRun());
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
public void testConstructorThrowsException() {
try {
new Timer(null, true);
fail("NullPointerException expected");
} catch (NullPointerException e) {
//expected
}
try {
new Timer(null, false);
fail("NullPointerException expected");
} catch (NullPointerException e) {
//expected
}
}
/**
* @tests java.util.Timer#cancel()
*/
public void test_cancel() {
Timer t = null;
try {
// Ensure a task throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
t.cancel();
boolean exception = false;
try {
t.schedule(testTask, 100, 200);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after Timer.cancel() should throw exception",
exception);
// Ensure a task is run but not after cancel
t = new Timer();
testTask = new TimerTestTask();
t.schedule(testTask, 100, 500);
synchronized (sync) {
try {
sync.wait(1000);
} catch (InterruptedException e) {
}
}
assertEquals("TimerTask.run() method not called after 200ms",
1, testTask.wasRun());
t.cancel();
synchronized (sync) {
try {
sync.wait(500);
} catch (InterruptedException e) {
}
}
assertEquals("TimerTask.run() method should not have been called after cancel",
1, testTask.wasRun());
// Ensure you can call cancel more than once
t = new Timer();
testTask = new TimerTestTask();
t.schedule(testTask, 100, 500);
synchronized (sync) {
try {
sync.wait(500);
} catch (InterruptedException e) {
}
}
assertEquals("TimerTask.run() method not called after 200ms",
1, testTask.wasRun());
t.cancel();
t.cancel();
t.cancel();
synchronized (sync) {
try {
sync.wait(500);
} catch (InterruptedException e) {
}
}
assertEquals("TimerTask.run() method should not have been called after cancel",
1, testTask.wasRun());
// Ensure that a call to cancel from within a timer ensures no more
// run
t = new Timer();
testTask = new TimerTestTask(t);
testTask.incrementCount(true);
testTask.terminateCount(5); // Terminate after 5 runs
t.schedule(testTask, 100, 100);
synchronized (sync) {
try {
sync.wait(200);
sync.wait(200);
sync.wait(200);
sync.wait(200);
sync.wait(200);
sync.wait(200);
} catch (InterruptedException e) {
}
}
assertTrue("TimerTask.run() method should be called 5 times not "
+ testTask.wasRun(), testTask.wasRun() == 5);
t.cancel();
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#purge()
*/
public void test_purge() throws Exception {
Timer t = null;
try {
t = new Timer();
assertEquals(0, t.purge());
TimerTestTask[] tasks = new TimerTestTask[100];
int[] delayTime = { 50, 80, 20, 70, 40, 10, 90, 30, 60 };
int j = 0;
for (int i = 0; i < 100; i++) {
tasks[i] = new TimerTestTask();
t.schedule(tasks[i], delayTime[j++], 200);
if (j == 9) {
j = 0;
}
}
for (int i = 0; i < 50; i++) {
tasks[i].cancel();
}
assertTrue(t.purge() <= 50);
assertEquals(0, t.purge());
} finally {
if (t != null) {
t.cancel();
}
}
}
/**
* @tests java.util.Timer#schedule(java.util.TimerTask, java.util.Date)
*/
public void test_scheduleLjava_util_TimerTaskLjava_util_Date() {
Timer t = null;
try {
// Ensure a Timer throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
Date d = new Date(System.currentTimeMillis() + 100);
t.cancel();
boolean exception = false;
try {
t.schedule(testTask, d);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after Timer.cancel() should throw exception",
exception);
// Ensure a Timer throws an IllegalStateException if task already
// cancelled
t = new Timer();
testTask = new TimerTestTask();
d = new Date(System.currentTimeMillis() + 100);
testTask.cancel();
exception = false;
try {
t.schedule(testTask, d);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after cancelling it should throw exception",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if delay is
// negative
t = new Timer();
testTask = new TimerTestTask();
d = new Date(-100);
exception = false;
try {
t.schedule(testTask, d);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with negative date should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws a NullPointerException if the task is null
t = new Timer();
exception = false;
d = new Date(System.currentTimeMillis() + 100);
try {
t.schedule(null, d);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"Scheduling a null task should throw NullPointerException",
exception);
t.cancel();
// Ensure a Timer throws a NullPointerException if the date is null
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, null);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"Scheduling a null date should throw NullPointerException",
exception);
t.cancel();
// Ensure proper sequence of exceptions
t = new Timer();
d = new Date(-100);
exception = false;
try {
t.schedule(null, d);
} catch (NullPointerException e) {
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a null task with negative date should throw IllegalArgumentException first",
exception);
t.cancel();
// Ensure a task is run
t = new Timer();
testTask = new TimerTestTask();
d = new Date(System.currentTimeMillis() + 200);
t.schedule(testTask, d);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertEquals("TimerTask.run() method not called after 200ms",
1, testTask.wasRun());
t.cancel();
// Ensure multiple tasks are run
t = new Timer();
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 100);
t.schedule(testTask, d);
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 150);
t.schedule(testTask, d);
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 70);
t.schedule(testTask, d);
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 10);
t.schedule(testTask, d);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertTrue(
"Multiple tasks should have incremented counter 4 times not "
+ timerCounter, timerCounter == 4);
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#schedule(java.util.TimerTask, long)
*/
public void test_scheduleLjava_util_TimerTaskJ() {
Timer t = null;
try {
// Ensure a Timer throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
t.cancel();
boolean exception = false;
try {
t.schedule(testTask, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after Timer.cancel() should throw exception",
exception);
// Ensure a Timer throws an IllegalStateException if task already
// cancelled
t = new Timer();
testTask = new TimerTestTask();
testTask.cancel();
exception = false;
try {
t.schedule(testTask, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after cancelling it should throw exception",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if delay is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, -100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with negative delay should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws a NullPointerException if the task is null
t = new Timer();
exception = false;
try {
t.schedule(null, 10);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"Scheduling a null task should throw NullPointerException",
exception);
t.cancel();
// Ensure proper sequence of exceptions
t = new Timer();
exception = false;
try {
t.schedule(null, -10);
} catch (NullPointerException e) {
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a null task with negative delays should throw IllegalArgumentException first",
exception);
t.cancel();
// Ensure a task is run
t = new Timer();
testTask = new TimerTestTask();
t.schedule(testTask, 200);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertEquals("TimerTask.run() method not called after 200ms",
1, testTask.wasRun());
t.cancel();
// Ensure multiple tasks are run
t = new Timer();
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 100);
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 150);
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 70);
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 10);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertTrue(
"Multiple tasks should have incremented counter 4 times not "
+ timerCounter, timerCounter == 4);
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#schedule(java.util.TimerTask, long, long)
*/
public void test_scheduleLjava_util_TimerTaskJJ() {
Timer t = null;
try {
// Ensure a Timer throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
t.cancel();
boolean exception = false;
try {
t.schedule(testTask, 100, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after Timer.cancel() should throw exception",
exception);
// Ensure a Timer throws an IllegalStateException if task already
// cancelled
t = new Timer();
testTask = new TimerTestTask();
testTask.cancel();
exception = false;
try {
t.schedule(testTask, 100, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after cancelling it should throw exception",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if delay is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, -100, 100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with negative delay should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if period is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, 100, -100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with negative period should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if period is
// zero
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, 100, 0);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with 0 period should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws a NullPointerException if the task is null
t = new Timer();
exception = false;
try {
t.schedule(null, 10, 10);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"Scheduling a null task should throw NullPointerException",
exception);
t.cancel();
// Ensure proper sequence of exceptions
t = new Timer();
exception = false;
try {
t.schedule(null, -10, -10);
} catch (NullPointerException e) {
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a null task with negative delays should throw IllegalArgumentException first",
exception);
t.cancel();
// Ensure a task is run at least twice
t = new Timer();
testTask = new TimerTestTask();
t.schedule(testTask, 100, 100);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertTrue(
"TimerTask.run() method should have been called at least twice ("
+ testTask.wasRun() + ")", testTask.wasRun() >= 2);
t.cancel();
// Ensure multiple tasks are run
t = new Timer();
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 100, 100); // at least 9 times
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 200, 100); // at least 7 times
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 300, 200); // at least 4 times
testTask = new TimerTestTask();
testTask.incrementCount(true);
t.schedule(testTask, 100, 200); // at least 4 times
try {
Thread.sleep(1200); // Allowed more room for error
} catch (InterruptedException e) {
}
assertTrue(
"Multiple tasks should have incremented counter 24 times not "
+ timerCounter, timerCounter >= 24);
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#schedule(java.util.TimerTask, java.util.Date,
* long)
*/
public void test_scheduleLjava_util_TimerTaskLjava_util_DateJ() {
Timer t = null;
try {
// Ensure a Timer throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
Date d = new Date(System.currentTimeMillis() + 100);
t.cancel();
boolean exception = false;
try {
t.schedule(testTask, d, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after Timer.cancel() should throw exception",
exception);
// Ensure a Timer throws an IllegalStateException if task already
// cancelled
t = new Timer();
d = new Date(System.currentTimeMillis() + 100);
testTask = new TimerTestTask();
testTask.cancel();
exception = false;
try {
t.schedule(testTask, d, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"Scheduling a task after cancelling it should throw exception",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if delay is
// negative
t = new Timer();
d = new Date(-100);
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, d, 100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with negative delay should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if period is
// negative
t = new Timer();
d = new Date(System.currentTimeMillis() + 100);
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, d, -100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a task with negative period should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws a NullPointerException if the task is null
t = new Timer();
d = new Date(System.currentTimeMillis() + 100);
exception = false;
try {
t.schedule(null, d, 10);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"Scheduling a null task should throw NullPointerException",
exception);
t.cancel();
// Ensure a Timer throws a NullPointerException if the date is null
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.schedule(testTask, null, 10);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"Scheduling a null task should throw NullPointerException",
exception);
t.cancel();
// Ensure proper sequence of exceptions
t = new Timer();
d = new Date(-100);
exception = false;
try {
t.schedule(null, d, 10);
} catch (NullPointerException e) {
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a null task with negative dates should throw IllegalArgumentException first",
exception);
t.cancel();
// Ensure a task is run at least twice
t = new Timer();
d = new Date(System.currentTimeMillis() + 100);
testTask = new TimerTestTask();
t.schedule(testTask, d, 100);
try {
Thread.sleep(800);
} catch (InterruptedException e) {
}
assertTrue(
"TimerTask.run() method should have been called at least twice ("
+ testTask.wasRun() + ")", testTask.wasRun() >= 2);
t.cancel();
// Ensure multiple tasks are run
t = new Timer();
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 100);
t.schedule(testTask, d, 100); // at least 9 times
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 200);
t.schedule(testTask, d, 100); // at least 7 times
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 300);
t.schedule(testTask, d, 200); // at least 4 times
testTask = new TimerTestTask();
testTask.incrementCount(true);
d = new Date(System.currentTimeMillis() + 100);
t.schedule(testTask, d, 200); // at least 4 times
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
}
assertTrue(
"Multiple tasks should have incremented counter 24 times not "
+ timerCounter, timerCounter >= 24);
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#scheduleAtFixedRate(java.util.TimerTask, long,
* long)
*/
public void test_scheduleAtFixedRateLjava_util_TimerTaskJJ() {
Timer t = null;
try {
// Ensure a Timer throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
t.cancel();
boolean exception = false;
try {
t.scheduleAtFixedRate(testTask, 100, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate after Timer.cancel() should throw exception",
exception);
// Ensure a Timer throws an IllegalArgumentException if delay is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.scheduleAtFixedRate(testTask, -100, 100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate with negative delay should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if period is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.scheduleAtFixedRate(testTask, 100, -100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate with negative period should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a task is run at least twice
t = new Timer();
testTask = new TimerTestTask();
t.scheduleAtFixedRate(testTask, 100, 100);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertTrue(
"TimerTask.run() method should have been called at least twice ("
+ testTask.wasRun() + ")", testTask.wasRun() >= 2);
t.cancel();
class SlowThenFastTask extends TimerTask {
int wasRun = 0;
long startedAt;
long lastDelta;
public void run() {
if (wasRun == 0)
startedAt = System.currentTimeMillis();
lastDelta = System.currentTimeMillis()
- (startedAt + (100 * wasRun));
wasRun++;
if (wasRun == 2) {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
}
}
public long lastDelta() {
return lastDelta;
}
public int wasRun() {
return wasRun;
}
}
// Ensure multiple tasks are run
t = new Timer();
SlowThenFastTask slowThenFastTask = new SlowThenFastTask();
// at least 9 times even when asleep
t.scheduleAtFixedRate(slowThenFastTask, 100, 100);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
long lastDelta = slowThenFastTask.lastDelta();
assertTrue("Fixed Rate Schedule should catch up, but is off by "
+ lastDelta + " ms", slowThenFastTask.lastDelta < 300);
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
/**
* @tests java.util.Timer#scheduleAtFixedRate(java.util.TimerTask,
* java.util.Date, long)
*/
public void test_scheduleAtFixedRateLjava_util_TimerTaskLjava_util_DateJ() {
Timer t = null;
try {
// Ensure a Timer throws an IllegalStateException after cancelled
t = new Timer();
TimerTestTask testTask = new TimerTestTask();
t.cancel();
boolean exception = false;
Date d = new Date(System.currentTimeMillis() + 100);
try {
t.scheduleAtFixedRate(testTask, d, 100);
} catch (IllegalStateException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate after Timer.cancel() should throw exception",
exception);
// Ensure a Timer throws an IllegalArgumentException if delay is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
d = new Date(-100);
try {
t.scheduleAtFixedRate(testTask, d, 100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate with negative Date should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws an IllegalArgumentException if period is
// negative
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.scheduleAtFixedRate(testTask, d, -100);
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate with negative period should throw IllegalArgumentException",
exception);
t.cancel();
// Ensure a Timer throws an NullPointerException if date is Null
t = new Timer();
testTask = new TimerTestTask();
exception = false;
try {
t.scheduleAtFixedRate(testTask, null, 100);
} catch (NullPointerException e) {
exception = true;
}
assertTrue(
"scheduleAtFixedRate with null date should throw NullPointerException",
exception);
t.cancel();
// Ensure proper sequence of exceptions
t = new Timer();
exception = false;
d = new Date(-100);
try {
t.scheduleAtFixedRate(null, d, 10);
} catch (NullPointerException e) {
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a null task with negative date should throw IllegalArgumentException first",
exception);
t.cancel();
// Ensure proper sequence of exceptions
t = new Timer();
exception = false;
try {
t.scheduleAtFixedRate(null, null, -10);
} catch (NullPointerException e) {
} catch (IllegalArgumentException e) {
exception = true;
}
assertTrue(
"Scheduling a null task & null date & negative period should throw IllegalArgumentException first",
exception);
t.cancel();
// Ensure a task is run at least twice
t = new Timer();
testTask = new TimerTestTask();
d = new Date(System.currentTimeMillis() + 100);
t.scheduleAtFixedRate(testTask, d, 100);
try {
Thread.sleep(400);
} catch (InterruptedException e) {
}
assertTrue(
"TimerTask.run() method should have been called at least twice ("
+ testTask.wasRun() + ")", testTask.wasRun() >= 2);
t.cancel();
class SlowThenFastTask extends TimerTask {
int wasRun = 0;
long startedAt;
long lastDelta;
public void run() {
if (wasRun == 0)
startedAt = System.currentTimeMillis();
lastDelta = System.currentTimeMillis()
- (startedAt + (100 * wasRun));
wasRun++;
if (wasRun == 2) {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
}
}
public long lastDelta() {
return lastDelta;
}
public int wasRun() {
return wasRun;
}
}
// Ensure multiple tasks are run
t = new Timer();
SlowThenFastTask slowThenFastTask = new SlowThenFastTask();
d = new Date(System.currentTimeMillis() + 100);
// at least 9 times even when asleep
t.scheduleAtFixedRate(slowThenFastTask, d, 100);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
long lastDelta = slowThenFastTask.lastDelta();
assertTrue("Fixed Rate Schedule should catch up, but is off by "
+ lastDelta + " ms", lastDelta < 300);
t.cancel();
} finally {
if (t != null)
t.cancel();
}
}
protected void setUp() {
timerCounter = 0;
}
protected void tearDown() {
}
}