tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/IdClassLabelColorTest.java

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

import org.eclipse.e4.ui.css.core.engine.CSSEngine;
import org.eclipse.e4.ui.css.swt.dom.SWTElement;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/*
 * Tests the CSS class and Id rules
 */

public class IdClassLabelColorTest extends CSSTestCase {

	static final RGB RED = new RGB(255, 0, 0);
	static final RGB GREEN = new RGB(0, 255, 0);
	static final RGB BLUE = new RGB(0, 0, 255);
	
	static final String CSS_CLASS_NAME = "makeItGreenClass";
	static final String CSS_ID = "makeItBlueID";
	
	protected Label createTestLabel(String styleSheet) {
		Display display = Display.getDefault();
		CSSEngine engine = createEngine(styleSheet, display);

		// Create widgets
		Shell shell = new Shell(display, SWT.SHELL_TRIM);
		FillLayout layout = new FillLayout();
		shell.setLayout(layout);

		Composite panel = new Composite(shell, SWT.NONE);
		panel.setLayout(new FillLayout());

		Label labelToTest = new Label(panel, SWT.NONE);
		labelToTest.setText("Some label text");
		SWTElement.setCSSClass(labelToTest, CSS_CLASS_NAME);
		SWTElement.setID(labelToTest, CSS_ID);
		
		// Apply styles
		engine.applyStyles(shell, true);

		shell.pack();
		shell.open();
		return labelToTest;
	}
	
	//For completeness, test that the html type rule works
	public void testWidgetClass() throws Exception {
		Label label = createTestLabel("Label { background-color: #FF0000 }");
		assertEquals(RED, label.getBackground().getRGB());
	}
	
	//Test the CSS class rule
	public void testCssClass() throws Exception {
		Label labelToTest = createTestLabel("." + CSS_CLASS_NAME + " { background-color: #00FF00 }");

		//Ensure the widget actually thinks it has this CSS class
		assertEquals(SWTElement.getCSSClass(labelToTest), CSS_CLASS_NAME);

		assertEquals(GREEN, labelToTest.getBackground().getRGB());
	}

	//Test the id rule
	public void testWidgetId() throws Exception {
		Label labelToTest = createTestLabel("#" + CSS_ID + " { background-color: #0000FF }");
		
		//Ensure the widget actually thinks it has this ID
		assertEquals(SWTElement.getID(labelToTest), CSS_ID);

		assertEquals(BLUE, labelToTest.getBackground().getRGB());
	}
}