/**
* Copyright (c) 2014 - 2017 Frank Appel
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Frank Appel - initial API and implementation
*/
package com.codeaffine.eclipse.ui.swt.theme;
import static org.assertj.core.api.Assertions.assertThat;
import java.util.Optional;
import org.junit.Rule;
import org.junit.Test;
import com.codeaffine.eclipse.swt.test.util.DisplayHelper;
public class AttributePreserverTest {
private static final AttributeKey<String> KEY = AttributeKey.key( "key", String.class );
private static final String VALUE = "value";
@Rule
public final DisplayHelper displayHelper = new DisplayHelper();
@Test
public void getNonExisting() {
AttributePreserver preserver = create();
Optional<String> actual = preserver.get( KEY );
assertThat( actual.isPresent() ).isFalse();
}
@Test
public void put() {
AttributePreserver preserver = create();
preserver.put( KEY, VALUE );
Optional<String> actual = preserver.get( KEY );
assertThat( actual.get() ).isSameAs( VALUE );
}
@Test( expected = IllegalArgumentException.class )
public void constructWithNullAsScrollableArgument() {
new AttributePreserver( null );
}
@Test( expected = IllegalArgumentException.class )
public void putWithNullAsKey() {
create().put( null, VALUE );
}
@Test( expected = IllegalArgumentException.class )
public void putWithNullAsValue() {
create().put( KEY, null );
}
@Test( expected = IllegalArgumentException.class )
public void getWithNullAsKey() {
create().get( null );
}
private AttributePreserver create() {
return new AttributePreserver( displayHelper.createShell() );
}
}