Example usage for org.eclipse.jface.databinding.conformance.util ValueChangeEventTracker observe

Introduction

In this page you can find the example usage for org.eclipse.jface.databinding.conformance.util ValueChangeEventTracker observe.

Prototype

public static <T> ValueChangeEventTracker<T> observe(IObservableValue<T> observable) 

Source Link

Document

Convenience method to register a new listener.

Usage

From source file:org.eclipse.core.tests.databinding.validation.MultiValidatorTest.java

License:Open Source License

public void testValidationStaleness() {
    ValueChangeEventTracker validationChangeCounter = ValueChangeEventTracker.observe(validationStatus);

    StaleEventTracker validationStaleCounter = StaleEventTracker.observe(validationStatus);

    // Assert initial state.
    assertFalse(validationStatus.isStale());
    assertEquals(0, validationChangeCounter.count);
    assertEquals(0, validationStaleCounter.count);

    // Change to a stale state.
    dependency.setStale(true);/*from www.  j a  v  a2  s. c  o m*/
    assertTrue(validationStatus.isStale());
    assertEquals(0, validationChangeCounter.count);
    assertEquals(1, validationStaleCounter.count); // +1

    // The validation status is already stale so even if it gets another
    // stale event from its dependencies, it should not propagate that
    // event.
    dependency.fireStale();
    assertTrue(validationStatus.isStale());
    assertEquals(0, validationChangeCounter.count);
    assertEquals(1, validationStaleCounter.count);

    // Change the validation status while remaining stale.
    dependency.setValue(ValidationStatus.error("e1"));
    assertTrue(validationStatus.isStale());
    assertEquals(1, validationChangeCounter.count); // +1
    assertEquals(1, validationStaleCounter.count);

    // Move back to a non-stale state.
    dependency.setStale(false);
    assertFalse(dependency.isStale());
    assertFalse(validationStatus.isStale());
    assertEquals(2, validationChangeCounter.count); // +1
    assertEquals(1, validationStaleCounter.count);
}

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From source file:org.eclipse.core.tests.internal.databinding.beans.JavaBeanObservableValueTest.java

License:Open Source License

public void testSetBeanProperty_CorrectForNullOldAndNewValues() {
    // The java bean spec allows the old and new values in a
    // PropertyChangeEvent to
    // be null, which indicates that an unknown change occured.

    // This test ensures that JavaBeanObservableValue fires the correct
    // value diff
    // even if the bean implementor is lazy :-P

    Bean bean = new AnnoyingBean();
    bean.setValue("old");
    IObservableValue observable = BeansObservables.observeValue(bean, "value");
    ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(observable);
    bean.setValue("new");
    assertEquals(1, tracker.count);/*ww w .  ja va2 s . c om*/
    assertEquals("old", tracker.event.diff.getOldValue());
    assertEquals("new", tracker.event.diff.getNewValue());
}

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From source file:org.eclipse.core.tests.internal.databinding.beans.JavaBeanObservableValueTest.java

License:Open Source License

public void testSetBeanPropertyOutsideRealm_FiresEventInsideRealm() {
    Bean bean = new Bean("old");
    CurrentRealm realm = new CurrentRealm(true);
    IObservableValue observable = BeansObservables.observeValue(realm, bean, "value");
    ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(observable);

    realm.setCurrent(false);/*  ww w.ja  va 2  s  .  c o  m*/
    bean.setValue("new");
    assertEquals(0, tracker.count);

    realm.setCurrent(true);
    assertEquals(1, tracker.count);
    assertEquals(Diffs.createValueDiff("old", "new"), tracker.event.diff);
}

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From source file:org.eclipse.core.tests.internal.databinding.observable.DelayedObservableValueTest.java

License:Open Source License

public void testSetValue_FiresValueChangeEvent() {
    ValueChangeEventTracker targetTracker = ValueChangeEventTracker.observe(target);
    ValueChangeEventTracker delayedTracker = ValueChangeEventTracker.observe(delayed);

    delayed.setValue(newValue);//from  w w  w . j a  va2s  . c om

    assertEquals(1, targetTracker.count);
    assertEquals(oldValue, targetTracker.event.diff.getOldValue());
    assertEquals(newValue, targetTracker.event.diff.getNewValue());

    assertEquals(1, delayedTracker.count);
    assertEquals(oldValue, delayedTracker.event.diff.getOldValue());
    assertEquals(newValue, delayedTracker.event.diff.getNewValue());
}

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From source file:org.eclipse.core.tests.internal.databinding.observable.DelayedObservableValueTest.java

License:Open Source License

private void assertFiresPendingValueChange(Runnable runnable) {
    ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(delayed);

    target.setValue(newValue);//from  w  w w.  j  a  v a2 s.  c o  m
    assertTrue(delayed.isStale());
    assertEquals(0, tracker.count);

    runnable.run();

    assertFalse(delayed.isStale());
    assertEquals(1, tracker.count);
    assertEquals(oldValue, tracker.event.diff.getOldValue());
    assertEquals(newValue, tracker.event.diff.getNewValue());
}

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From source file:org.eclipse.core.tests.internal.databinding.observable.ValidatedObservableValueTest.java

License:Open Source License

public void testSetValue_SingleValueChangeEvent() {
    ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(validated);

    validated.setValue(newValue);//from w ww  .ja va2  s  . c om
    assertEquals(1, tracker.count);
    assertEquals(oldValue, tracker.event.diff.getOldValue());
    assertEquals(newValue, tracker.event.diff.getNewValue());
}

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From source file:org.eclipse.core.tests.internal.databinding.observable.ValidatedObservableValueTest.java

License:Open Source License

public void testSetValue_SingleValueChangeEventWhileInvalid() {
    ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(validated);

    validationStatus.setValue(ValidationStatus.error("error"));
    validated.setValue(newValue);//from  w  w  w.j  a  va 2 s  . c o  m
    assertEquals(1, tracker.count);
    assertEquals(oldValue, tracker.event.diff.getOldValue());
    assertEquals(newValue, tracker.event.diff.getNewValue());
}

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From source file:org.eclipse.core.tests.internal.databinding.observable.ValidatedObservableValueTest.java

License:Open Source License

public void testSetValue_FiresSingleValueChangeEventWithTargetOverride() {
    ValueChangeEventTracker tracker = ValueChangeEventTracker.observe(validated);

    Object overrideValue = new Object();
    target.overrideValue = overrideValue;
    validated.setValue(newValue);/*from  w w  w  .j  a  va  2 s.  c  om*/

    assertEquals(1, tracker.count);
    assertEquals(oldValue, tracker.event.diff.getOldValue());
    assertEquals(overrideValue, tracker.event.diff.getNewValue());
}

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From source file:org.eclipse.core.tests.internal.databinding.observable.ValidatedObservableValueTest.java

License:Open Source License

public void testSetValue_FiresValueChangeEvent() {
    ValueChangeEventTracker targetTracker = ValueChangeEventTracker.observe(target);
    ValueChangeEventTracker validatedTracker = ValueChangeEventTracker.observe(validated);

    validated.setValue(newValue);/*from  w  ww .j a  v  a2  s  .  c om*/

    assertEquals(1, targetTracker.count);
    assertEquals(oldValue, targetTracker.event.diff.getOldValue());
    assertEquals(newValue, targetTracker.event.diff.getNewValue());

    assertEquals(1, validatedTracker.count);
    assertEquals(oldValue, validatedTracker.event.diff.getOldValue());
    assertEquals(newValue, validatedTracker.event.diff.getNewValue());
}

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