/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.tests.api;

import org.eclipse.core.resources.IFile;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.tests.harness.util.EmptyPerspective;
import org.eclipse.ui.tests.harness.util.UITestCase;

/**
 * SessionRestoreTest runs the second half of our session
 * presistance tests.
 * 
 */
public class SessionRestoreTest extends UITestCase {

    /** 
     * Construct an instance.
     */
    public SessionRestoreTest(String arg) {
        super(arg);
    }

    /**
     * Generates a session state in the workbench.
     */
    public void testRestoreSession() throws Throwable {
        IWorkbenchWindow[] windows;
        IWorkbenchPage[] pages;

        // Get windows.
        windows = fWorkbench.getWorkbenchWindows();
        assertEquals(windows.length, 3);

        // First window contains empty perspective.
        pages = windows[0].getPages();
        assertEquals(pages.length, 1);
        assertEquals(pages[0].getPerspective().getId(),
                EmptyPerspective.PERSP_ID);

        // Second window contains empty + session.
        pages = windows[1].getPages();
        assertEquals(pages.length, 2);
        assertEquals(pages[0].getPerspective().getId(),
                EmptyPerspective.PERSP_ID);
        assertEquals(pages[1].getPerspective().getId(), SessionPerspective.ID);
        testSessionView(pages[1]);

        // Third window contains 2 sessions.
        pages = windows[2].getPages();
        assertEquals(pages.length, 2);
        assertEquals(pages[0].getPerspective().getId(), SessionPerspective.ID);
        assertEquals(pages[1].getPerspective().getId(), SessionPerspective.ID);
        testSessionView(pages[0]);
        testSessionView(pages[1]);

        // Last page contains 3 editors.
        IEditorReference[] editors = pages[1].getEditorReferences();
        assertEquals(editors.length, 3);
        testSessionEditor(editors[0].getEditor(true),
                SessionCreateTest.TEST_FILE_1);
        testSessionEditor(editors[1].getEditor(true),
                SessionCreateTest.TEST_FILE_2);
        testSessionEditor(editors[2].getEditor(true),
                SessionCreateTest.TEST_FILE_3);
    }

    /**
     * Tests the session view within a page.
     */
    private void testSessionView(IWorkbenchPage page) {
        IViewPart view = page.findView(SessionView.VIEW_ID);
        assertNotNull(view);
        SessionView sessionView = (SessionView) view;
        sessionView.testMementoState(this);
    }

    /**
     * Tests the state of a session editor.
     */
    private void testSessionEditor(IEditorPart part, String fileName) {
        IEditorSite site = part.getEditorSite();
        assertEquals(site.getId(), MockEditorPart.ID1);
        IEditorInput input = part.getEditorInput();
        assertTrue(input instanceof IFileEditorInput);
        IFile file = ((IFileEditorInput) input).getFile();
        assertEquals(fileName, file.getName());
    }
}