[FIXED JENKINS-12357] Crontab#ceil may stuck in an infinite loop or may return an incorrect value if day of week is 7 (=0, Sunday)

To use @Test(timeout), inheritance from TestCase should be removed

core/src/main/java/hudson/scheduler/CronTab.java

@@ -89,8 +89,10 @@ public final class CronTab {
         spec = format;
 
         parser.startRule(this);
-        if((dayOfWeek&(1<<7))!=0)
+        if((dayOfWeek&(1<<7))!=0) {
             dayOfWeek |= 1; // copy bit 7 over to bit 0
+            dayOfWeek &= ~(1<<7); // clear bit 7 or CalendarField#ceil will return an invalid value 7
+        }
     }
 
 

core/src/test/java/hudson/scheduler/CronTabDayOfWeekLocaleTest.java

@@ -13,6 +13,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
+import org.jvnet.hudson.test.Bug;
 import org.jvnet.hudson.test.For;
 import org.jvnet.hudson.test.Url;
 
@@ -273,7 +274,68 @@ public class CronTabDayOfWeekLocaleTest {
         expected.set(2011, 0, 9, 1, 0, 0);
         compare(expected, actual);
     }
-    
+
+    @Test
+    @Bug(12357)
+    public void isSundayAndNextRunIsNextSunday7() throws Exception {
+        final Calendar cal = Calendar.getInstance(locale);
+        cal.set(2011, 0, 16, 1, 0, 0); // Sunday, Jan 16th 2011, 01:00
+        final String cronStr = "0 0 * * 7"; // Sundays(7 not 0) @00:00
+
+        final CronTab cron = new CronTab(cronStr);
+        final Calendar actual = cron.ceil(cal);
+
+        final Calendar expected = Calendar.getInstance();
+        // Expected next: Sunday, Jan 22th 2011, 00:00
+        expected.set(2011, 0, 23, 0, 0, 0);
+        compare(expected, actual);
+    }
+
+    @Test
+    public void isSundayAndPreviousRunIsPreviousSunday7() throws Exception {
+        final Calendar cal = Calendar.getInstance(locale);
+        cal.set(2011, 0, 16, 0, 0, 0); // Sunday, Jan 16th 2011, 00:00
+        final String cronStr = "0 1 * * 7"; // Sundays(7 not 0) @01:00
+
+        final CronTab cron = new CronTab(cronStr);
+        final Calendar actual = cron.floor(cal);
+
+        final Calendar expected = Calendar.getInstance();
+        // Expected next: Sunday, Jan 9th 2011, 01:00
+        expected.set(2011, 0, 9, 1, 0, 0);
+        compare(expected, actual);
+    }
+
+    @Test
+    public void isSaturdayAndNextRunIsSundayAsterisk() throws Exception {
+        final Calendar cal = Calendar.getInstance(locale);
+        cal.set(2011, 0, 15, 1, 0, 0); // Saturday, Jan 15th 2011, 01:00
+        final String cronStr = "0 0 * * *"; // Everyday @00:00
+
+        final CronTab cron = new CronTab(cronStr);
+        final Calendar actual = cron.ceil(cal);
+
+        final Calendar expected = Calendar.getInstance();
+        // Expected next: Sunday, Jan 16th 2011, 00:00
+        expected.set(2011, 0, 16, 0, 0, 0);
+        compare(expected, actual);
+    }
+
+    @Test
+    public void isSundayAndPreviousRunIsSaturdayAsterisk() throws Exception {
+        final Calendar cal = Calendar.getInstance(locale);
+        cal.set(2011, 0, 16, 0, 0, 0); // Sunday, Jan 16th 2011, 00:00
+        final String cronStr = "0 23 * * *"; // Everyday @23:00
+
+        final CronTab cron = new CronTab(cronStr);
+        final Calendar actual = cron.floor(cal);
+
+        final Calendar expected = Calendar.getInstance();
+        // Expected next: Saturday, Jan 15th 2011, 23:00
+        expected.set(2011, 0, 15, 23, 0, 0);
+        compare(expected, actual);
+    }
+
     private void compare(final Calendar expected, final Calendar actual) {
         final DateFormat f = DateFormat.getDateTimeInstance();
         final String msg = "Locale: " + locale + " FirstDayOfWeek: " + actual.getFirstDayOfWeek() + " Expected: "

core/src/test/java/hudson/scheduler/CronTabTest.java

@@ -29,7 +29,8 @@ import java.util.Calendar;
 import java.util.GregorianCalendar;
 import java.util.Locale;
 
-import junit.framework.TestCase;
+import static org.junit.Assert.*;
+import org.junit.Test;
 import org.jvnet.hudson.test.Bug;
 import org.jvnet.hudson.test.Url;
 
@@ -38,7 +39,7 @@ import static java.util.Calendar.MONDAY;
 /**
  * @author Kohsuke Kawaguchi
  */
-public class CronTabTest extends TestCase {
+public class CronTabTest {
     public void test1() throws ANTLRException {
         new CronTab("@yearly");
         new CronTab("@weekly");
@@ -72,6 +73,16 @@ public class CronTabTest extends TestCase {
         compare(new GregorianCalendar(2010,7,1,0,0),x.ceil(c));
     }
 
+    @Test(timeout = 1000)
+    @Bug(12357)
+    public void testCeil3_DoW7() throws Exception {
+        // similar to testCeil3, but DoW=7 may stuck in an infinite loop
+        CronTab x = new CronTab("0 0 1 * 7");
+        Calendar c = new GregorianCalendar(2010,0,1,15,55);
+        // the first such day in 2010 is Aug 1st
+        compare(new GregorianCalendar(2010, 7, 1, 0, 0), x.ceil(c));
+    }
+
     /**
      * Verifies that HUDSON-8656 never crops up again.
      */