timeunittest.java

来自「SRI international 发布的OAA框架软件」· Java 代码 · 共 483 行 · 第 1/2 页

                         TimeUnit.DAYS.toHours(t));
            assertEquals(t,
                         TimeUnit.HOURS.toHours(t));
            assertEquals(t,
                         TimeUnit.MINUTES.toHours(t*60));
            assertEquals(t,
                         TimeUnit.SECONDS.toHours(t*60*60));
            assertEquals(t,
                         TimeUnit.MILLISECONDS.toHours(t*1000L*60*60));
            assertEquals(t,
                         TimeUnit.MICROSECONDS.toHours(t*1000000L*60*60));
            assertEquals(t,
                         TimeUnit.NANOSECONDS.toHours(t*1000000000L*60*60));
        }
    }

    /**
     * toDays correctly converts sample values in different units to
     * days
     */
    public void testToDays() {
        for (long t = 0; t < 88888; ++t) {
            assertEquals(t,
                         TimeUnit.DAYS.toDays(t));
            assertEquals(t,
                         TimeUnit.HOURS.toDays(t*24));
            assertEquals(t,
                         TimeUnit.MINUTES.toDays(t*60*24));
            assertEquals(t,
                         TimeUnit.SECONDS.toDays(t*60*60*24));
            assertEquals(t,
                         TimeUnit.MILLISECONDS.toDays(t*1000L*60*60*24));
            assertEquals(t,
                         TimeUnit.MICROSECONDS.toDays(t*1000000L*60*60*24));
            assertEquals(t,
                         TimeUnit.NANOSECONDS.toDays(t*1000000000L*60*60*24));
        }
    }


    /**
     * convert saturates positive too-large values to Long.MAX_VALUE
     * and negative to LONG.MIN_VALUE
     */
    public void testConvertSaturate() {
        assertEquals(Long.MAX_VALUE,
                     TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
                                                  TimeUnit.SECONDS));
        assertEquals(Long.MIN_VALUE,
                     TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
                                                  TimeUnit.SECONDS));
        assertEquals(Long.MAX_VALUE,
                     TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
                                                  TimeUnit.MINUTES));
        assertEquals(Long.MIN_VALUE,
                     TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
                                                  TimeUnit.MINUTES));
        assertEquals(Long.MAX_VALUE,
                     TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
                                                  TimeUnit.HOURS));
        assertEquals(Long.MIN_VALUE,
                     TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
                                                  TimeUnit.HOURS));
        assertEquals(Long.MAX_VALUE,
                     TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
                                                  TimeUnit.DAYS));
        assertEquals(Long.MIN_VALUE,
                     TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
                                                  TimeUnit.DAYS));

    }

    /**
     * toNanos saturates positive too-large values to Long.MAX_VALUE
     * and negative to LONG.MIN_VALUE
     */
    public void testToNanosSaturate() {
            assertEquals(Long.MAX_VALUE,
                         TimeUnit.MILLISECONDS.toNanos(Long.MAX_VALUE / 2));
            assertEquals(Long.MIN_VALUE,
                         TimeUnit.MILLISECONDS.toNanos(-Long.MAX_VALUE / 3));
    }


    /**
     * toString returns string containing common name of unit
     */
    public void testToString() {
        String s = TimeUnit.SECONDS.toString();
        assertTrue(s.indexOf("ECOND") >= 0);
    }


    /**
     *  Timed wait without holding lock throws
     *  IllegalMonitorStateException
     */
    public void testTimedWait_IllegalMonitorException() {
	//created a new thread with anonymous runnable

        Thread t = new Thread(new Runnable() {
                public void run() {
                    Object o = new Object();
                    TimeUnit tu = TimeUnit.MILLISECONDS;
                    try {
                        tu.timedWait(o,LONG_DELAY_MS);
                        threadShouldThrow();
                    }
                    catch (InterruptedException ie) {
                        threadUnexpectedException();
                    }
                    catch(IllegalMonitorStateException success) {
                    }

                }
            });
        t.start();
        try {
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch(Exception e) {
            unexpectedException();
        }
    }

    /**
     * timedWait throws InterruptedException when interrupted
     */
    public void testTimedWait() {
	Thread t = new Thread(new Runnable() {
		public void run() {
		    Object o = new Object();

		    TimeUnit tu = TimeUnit.MILLISECONDS;
		    try {
			synchronized(o) {
			    tu.timedWait(o,MEDIUM_DELAY_MS);
			}
                        threadShouldThrow();
		    }
		    catch(InterruptedException success) {}
		    catch(IllegalMonitorStateException failure) {
			threadUnexpectedException();
		    }
		}
	    });
	t.start();
        try {
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch(Exception e) {
            unexpectedException();
        }
    }


    /**
     * timedJoin throws InterruptedException when interrupted
     */
    public void testTimedJoin() {
	Thread t = new Thread(new Runnable() {
		public void run() {
		    TimeUnit tu = TimeUnit.MILLISECONDS;
		    try {
			Thread s = new Thread(new Runnable() {
                                public void run() {
                                    try {
                                        Thread.sleep(MEDIUM_DELAY_MS);
                                    } catch(InterruptedException success){}
                                }
                            });
			s.start();
			tu.timedJoin(s,MEDIUM_DELAY_MS);
                        threadShouldThrow();
		    }
		    catch(Exception e) {}
		}
	    });
	t.start();
        try {
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch(Exception e) {
            unexpectedException();
        }
    }

    /**
     *  timedSleep throws InterruptedException when interrupted
     */
    public void testTimedSleep() {
	//created a new thread with anonymous runnable

	Thread t = new Thread(new Runnable() {
		public void run() {
		    TimeUnit tu = TimeUnit.MILLISECONDS;
		    try {
			tu.sleep(MEDIUM_DELAY_MS);
                        threadShouldThrow();
		    }
		    catch(InterruptedException success) {}
		}
	    });
	t.start();
        try {
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch(Exception e) {
            unexpectedException();
        }
    }

    /**
     * a deserialized serialized unit is equal
     */
    public void testSerialization() {
        TimeUnit q = TimeUnit.MILLISECONDS;

        try {
            ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
            ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
            out.writeObject(q);
            out.close();

            ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
            ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
            TimeUnit r = (TimeUnit)in.readObject();

            assertEquals(q.toString(), r.toString());
        } catch(Exception e){
            e.printStackTrace();
            unexpectedException();
        }
    }

}