tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/css/swt/helpers/PreferenceOverriddenByCssChangeListenerTest.java

/*******************************************************************************
 * Copyright (c) 2008, 2014 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Thibault Le Ouay <thibaultleouay@gmail.com> - Bug 443094
 *******************************************************************************/

package org.eclipse.e4.ui.css.swt.helpers;

import static org.eclipse.e4.ui.css.swt.helpers.EclipsePreferencesHelper.PROPS_OVERRIDDEN_BY_CSS_PROP;
import static org.eclipse.e4.ui.css.swt.helpers.EclipsePreferencesHelper.SEPARATOR;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

import org.eclipse.core.internal.preferences.EclipsePreferences;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
import org.eclipse.e4.ui.css.swt.helpers.EclipsePreferencesHelper.PreferenceOverriddenByCssChangeListener;
import org.junit.Test;

public class PreferenceOverriddenByCssChangeListenerTest {

	@Test
	public void testPreferenceChangeEvent() {
		// given
		IEclipsePreferences preferences = new EclipsePreferences();
		preferences.put(PROPS_OVERRIDDEN_BY_CSS_PROP, SEPARATOR + "name" + SEPARATOR);

		PreferenceChangeEvent event = new PreferenceChangeEvent(preferences, "name", "oldValue", "newValue");

		PreferenceOverriddenByCssChangeListenerTestable preferenceChangeListener = spy(
				new PreferenceOverriddenByCssChangeListenerTestable());

		// when
		preferenceChangeListener.preferenceChange(event);

		// then
		verify(preferenceChangeListener, times(1)).removeOverriddenByCssProperty(event);
	}

	@Test
	public void testPreferenceChangeEventWhenAddPropertyEvent() {
		// given
		IEclipsePreferences preferences = new EclipsePreferences();
		preferences.put(PROPS_OVERRIDDEN_BY_CSS_PROP, SEPARATOR + "name" + SEPARATOR);

		PreferenceChangeEvent event = new PreferenceChangeEvent(preferences, "name", null, "newValue");

		PreferenceOverriddenByCssChangeListenerTestable preferenceChangeListener = spy(
				new PreferenceOverriddenByCssChangeListenerTestable());

		// when
		preferenceChangeListener.preferenceChange(event);

		// then
		verify(preferenceChangeListener, never()).removeOverriddenByCssProperty(event);
	}

	@Test
	public void testPreferenceChangeEventWhenRemovePropertyEvent() {
		// given
		IEclipsePreferences preferences = new EclipsePreferences();
		preferences.put(PROPS_OVERRIDDEN_BY_CSS_PROP, SEPARATOR + "name" + SEPARATOR);

		PreferenceChangeEvent event = new PreferenceChangeEvent(preferences, "name", "oldValue", null);

		PreferenceOverriddenByCssChangeListenerTestable preferenceChangeListener = spy(
				new PreferenceOverriddenByCssChangeListenerTestable());

		// when
		preferenceChangeListener.preferenceChange(event);

		// then
		verify(preferenceChangeListener, never()).removeOverriddenByCssProperty(event);
	}

	@Test
	public void testPreferenceChangeEventWhenModifyPropertyEventButPropertyIsNotOverriddenByCss() {
		// given
		IEclipsePreferences preferences = new EclipsePreferences();

		PreferenceChangeEvent event = new PreferenceChangeEvent(preferences, "name", "oldValue", "newValue");

		PreferenceOverriddenByCssChangeListenerTestable preferenceChangeListener = spy(
				new PreferenceOverriddenByCssChangeListenerTestable());

		// when
		preferenceChangeListener.preferenceChange(event);

		// then
		verify(preferenceChangeListener, never()).removeOverriddenByCssProperty(event);
	}

	public static class PreferenceOverriddenByCssChangeListenerTestable
	extends PreferenceOverriddenByCssChangeListener {
		@Override
		public void removeOverriddenByCssProperty(PreferenceChangeEvent event) {
		}
	}
}