Bug 484157: Fix computation of fonts to propage zoom action

Change-Id: I058fff5a7bf3df89b646a15696b8ab79f8eb632d
Signed-off-by: Mickael Istria <mistria@redhat.com>

3 files changed, 129 insertions, 2 deletions

diff --git a/org.eclipse.ui.editors.tests/META-INF/MANIFEST.MF b/org.eclipse.ui.editors.tests/META-INF/MANIFEST.MF
index 2b03bcd5007..c576df312bf 100644
--- a/org.eclipse.ui.editors.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.ui.editors.tests/META-INF/MANIFEST.MF
@@ -17,7 +17,8 @@ Require-Bundle:
  org.eclipse.core.resources;bundle-version="[3.5.0,4.0.0)",
  org.eclipse.core.filebuffers.tests;bundle-version="[3.4.100,4.0.0)",
  org.eclipse.ui.ide;bundle-version="[3.5.0,4.0.0)",
- org.eclipse.text.tests;bundle-version="[3.5.0,4.0.0)"
+ org.eclipse.text.tests;bundle-version="[3.5.0,4.0.0)",
+ org.eclipse.test.performance;bundle-version="[3.12.0,4.0.0)
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Eclipse-BundleShape: dir
 Bundle-ActivationPolicy: lazy
diff --git a/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/EditorsTestSuite.java b/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/EditorsTestSuite.java
index 2c4a13a8733..b2efda56e9c 100644
--- a/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/EditorsTestSuite.java
+++ b/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/EditorsTestSuite.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2014 IBM Corporation and others.
+ * Copyright (c) 2000, 2016 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
@@ -7,6 +7,7 @@
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
+ *     Mickael Istria (Red Hat Inc.) - [484157] Add zoom test
  *******************************************************************************/
 package org.eclipse.ui.editors.tests;
 
@@ -28,6 +29,7 @@ public class EditorsTestSuite extends TestSuite {
 		suite.addTest(GotoLineTest.suite());
 		suite.addTest(SegmentedModeTest.suite());
 		suite.addTest(MarkerAnnotationOrderTest.suite());
+		suite.addTest(ZoomTest.suite());
 		//$JUnit-END$
 		return suite;
 	}
diff --git a/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/ZoomTest.java b/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/ZoomTest.java
new file mode 100644
index 00000000000..5104e0b865b
--- /dev/null
+++ b/org.eclipse.ui.editors.tests/src/org/eclipse/ui/editors/tests/ZoomTest.java
@@ -0,0 +1,124 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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:
+ *     Mickael Istria (Red Hat Inc.)
+ *******************************************************************************/
+package org.eclipse.ui.editors.tests;
+
+import java.io.ByteArrayInputStream;
+import java.util.Collections;
+
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import org.eclipse.test.OrderedTestSuite;
+
+import org.eclipse.swt.custom.StyledText;
+import org.eclipse.swt.widgets.Control;
+
+import org.eclipse.core.commands.Command;
+import org.eclipse.core.commands.ExecutionEvent;
+
+import org.eclipse.core.runtime.NullProgressMonitor;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.ResourcesPlugin;
+
+import org.eclipse.ui.IEditorDescriptor;
+import org.eclipse.ui.PlatformUI;
+import org.eclipse.ui.commands.ICommandService;
+import org.eclipse.ui.intro.IIntroPart;
+import org.eclipse.ui.part.FileEditorInput;
+
+import org.eclipse.ui.texteditor.AbstractTextEditor;
+
+import junit.extensions.TestSetup;
+import junit.framework.TestCase;
+
+/**
+ * @since 3.11
+ *
+ */
+public class ZoomTest extends TestCase {
+
+	private static IProject project;
+	private static IFile file;
+	private StyledText text;
+	private AbstractTextEditor editor;
+	private int initialFontSize;
+
+	@BeforeClass
+	public static void setUpBeforeClass() throws Exception {
+		project = ResourcesPlugin.getWorkspace().getRoot().getProject("test");
+		project.create(new NullProgressMonitor());
+		project.open(new NullProgressMonitor());
+		file = project.getFile("foo.txt");
+		file.create(new ByteArrayInputStream("bar".getBytes()), true, new NullProgressMonitor());
+	}
+
+	@AfterClass
+	public static void tearDownAfterClass() throws Exception {
+		file.delete(true, new NullProgressMonitor());
+		project.delete(true, new NullProgressMonitor());
+	}
+
+	@Override
+	@Before
+	public void setUp() throws Exception {
+		super.setUp();
+		IIntroPart intro = PlatformUI.getWorkbench().getIntroManager().getIntro();
+		if (intro != null) {
+			PlatformUI.getWorkbench().getIntroManager().closeIntro(intro);
+		}
+
+		IEditorDescriptor desc = PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(file.getName());
+		editor = (AbstractTextEditor) PlatformUI.getWorkbench().getActiveWorkbenchWindow()
+				.getActivePage().openEditor(new FileEditorInput(file), desc.getId());
+		editor.setFocus();
+		text = (StyledText) editor.getAdapter(Control.class);
+		// make sure we start from a clean state
+		initialFontSize = text.getFont().getFontData()[0].getHeight();
+	}
+
+	@Test
+	public void testZoomCommand() throws Exception {
+		int times = 6;
+		{
+			Command zoomInCommand = PlatformUI.getWorkbench().getService(ICommandService.class)
+					.getCommand("org.eclipse.ui.edit.text.zoomIn");
+			for (int i = 0; i < times; i++) {
+				zoomInCommand.executeWithChecks(new ExecutionEvent(zoomInCommand, Collections.EMPTY_MAP, null, null));
+			}
+			Assert.assertEquals(this.initialFontSize + 12, text.getFont().getFontData()[0].getHeight());
+		}
+		{
+			Command zoomOutCommand = PlatformUI.getWorkbench().getService(ICommandService.class)
+					.getCommand("org.eclipse.ui.edit.text.zoomOut");
+			for (int i = 0; i < times; i++) {
+				zoomOutCommand.executeWithChecks(new ExecutionEvent(zoomOutCommand, Collections.EMPTY_MAP, null, null));
+			}
+			Assert.assertEquals(this.initialFontSize, text.getFont().getFontData()[0].getHeight());
+		}
+	}
+
+	public static junit.framework.Test suite() {
+		return new TestSetup(new OrderedTestSuite(ZoomTest.class)) {
+			protected void setUp() throws Exception {
+				ZoomTest.setUpBeforeClass();
+			}
+			protected void tearDown() throws Exception {
+				ZoomTest.tearDownAfterClass();
+			}
+		};
+	}
+
+}