Bug 430052 - [CSS] Imported rules cannot be overridden

Added testcase

Change-Id: I4ddf08b274351d17d5e11ce86af6cb2a271d5b79
Signed-off-by: Stefan Winkler <stefan@winklerweb.net>

2 files changed, 109 insertions, 0 deletions

diff --git a/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/CssCoreTestSuite.java b/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/CssCoreTestSuite.java
index a11faee638b..144f2ee1d52 100644
--- a/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/CssCoreTestSuite.java
+++ b/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/CssCoreTestSuite.java
@@ -7,6 +7,7 @@
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
+ *     Stefan Winkler <stefan@winklerweb.net> - Bug 430052 
  *******************************************************************************/
 package org.eclipse.e4.ui.tests.css.core;
 
@@ -15,6 +16,7 @@ import junit.framework.TestSuite;
 
 import org.eclipse.e4.ui.tests.css.core.parser.CascadeTest;
 import org.eclipse.e4.ui.tests.css.core.parser.FontFaceRulesTest;
+import org.eclipse.e4.ui.tests.css.core.parser.ImportTest;
 import org.eclipse.e4.ui.tests.css.core.parser.RGBColorImplTest;
 import org.eclipse.e4.ui.tests.css.core.parser.SelectorTest;
 import org.eclipse.e4.ui.tests.css.core.parser.StyleRuleTest;
@@ -38,6 +40,7 @@ public class CssCoreTestSuite extends TestSuite {
 		addTestSuite(ValueTest.class);
 		addTestSuite(SelectorTest.class);
 		addTestSuite(CSSEngineTest.class);
+		addTestSuite(ImportTest.class);
 		// $JUnit-END$
 	}
 }
diff --git a/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/parser/ImportTest.java b/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/parser/ImportTest.java
new file mode 100644
index 00000000000..ffa30d65e91
--- /dev/null
+++ b/tests/org.eclipse.e4.ui.tests.css.core/src/org/eclipse/e4/ui/tests/css/core/parser/ImportTest.java
@@ -0,0 +1,106 @@
+/*******************************************************************************
+ * Copyright (c) 2014 Stefan Winkler 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:
+ *   Stefan Winkler <stefan@winklerweb.net> - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.e4.ui.tests.css.core.parser;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.StringReader;
+
+import junit.framework.TestCase;
+
+import org.eclipse.e4.ui.css.core.engine.CSSEngine;
+import org.eclipse.e4.ui.css.core.impl.dom.DocumentCSSImpl;
+import org.eclipse.e4.ui.css.core.impl.dom.ViewCSSImpl;
+import org.eclipse.e4.ui.tests.css.core.util.ParserTestUtil;
+import org.eclipse.e4.ui.tests.css.core.util.TestElement;
+import org.w3c.css.sac.InputSource;
+import org.w3c.dom.css.CSSStyleDeclaration;
+import org.w3c.dom.css.ViewCSS;
+import org.w3c.dom.stylesheets.StyleSheet;
+
+public class ImportTest extends TestCase {
+
+	private CSSEngine engine;
+
+	@Override
+	protected void setUp() throws Exception {
+		engine = ParserTestUtil.createEngine();
+	}
+
+	/**
+	 * Test case for Bug 430052 - [CSS] Imported rules cannot be overridden
+	 *
+	 * @throws Exception
+	 */
+	public void testOverrideImportedRule() throws Exception {
+		String importedCss = ".ClassAlpha {\n" //
+				+ "     property: value;\n" //
+				+ "  }\n" + "  .ClassBeta {\n" //
+				+ "     property: value1;\n" //
+				+ "  }";
+
+		File importedFile = createTempCssFile(importedCss);
+		String importedFileName = importedFile.getName();
+		String importedFilePath = importedFile.getParent();
+
+		String importingCss = "@import url('" + importedFileName + "');\n" //
+				+ "  .ClassBeta {\n" //
+				+ "     property: value2;\n" //
+				+ "  }";
+
+		// we need a file URL so that the import can be resolved
+		String importingUrl = "file:///" + importedFilePath + "/importing.css";
+
+		ViewCSS viewCSS = createViewCss(importingUrl, importingCss);
+
+		TestElement buttonAlpha = new TestElement("Button", engine);
+		buttonAlpha.setClass("ClassAlpha");
+
+		TestElement buttonBeta = new TestElement("Button", engine);
+		buttonBeta.setClass("ClassBeta");
+
+		CSSStyleDeclaration styleAlpha = viewCSS.getComputedStyle(buttonAlpha,
+				null);
+		CSSStyleDeclaration styleBeta = viewCSS.getComputedStyle(buttonBeta,
+				null);
+
+		assertEquals("value", styleAlpha.getPropertyCSSValue("property")
+				.getCssText());
+		assertEquals("value2", styleBeta.getPropertyCSSValue("property")
+				.getCssText());
+	}
+
+	private File createTempCssFile(String cssString) throws Exception {
+		File result = File.createTempFile("e4.ui.tests-", ".css");
+		FileWriter fileWriter = new FileWriter(result);
+		try {
+			fileWriter.write(cssString);
+			return result;
+		} finally {
+			try {
+				fileWriter.close();
+			} catch (IOException e) {
+			}
+		}
+	}
+
+	private ViewCSS createViewCss(String sourceUrl, String cssString)
+			throws IOException {
+		InputSource source = new InputSource();
+		source.setURI(sourceUrl); // must not be null
+		source.setCharacterStream(new StringReader(cssString));
+		StyleSheet styleSheet = engine.parseStyleSheet(source);
+
+		DocumentCSSImpl docCss = new DocumentCSSImpl();
+		docCss.addStyleSheet(styleSheet);
+		return new ViewCSSImpl(docCss);
+	}
+}