Resolve resources URLs as file-URLs if running in an OSGi environment

Don't consider the 'PLUGIN_PATH' property anymore, which is set in
I-build tests and whose handling doesn't work anymore.

Fixes #2001

Author: HannesWell

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/SwtTestUtil.java

@@ -20,12 +20,10 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import java.io.IOException;
+import java.io.InputStream;
 import java.io.PrintStream;
-import java.net.URI;
-import java.net.URISyntaxException;
-import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -50,6 +48,7 @@
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.test.Screenshots;
+import org.junit.rules.TemporaryFolder;
 
 public class SwtTestUtil {
 	/**
@@ -582,26 +581,19 @@ public static boolean hasPixelNotMatching(Image image, Color nonMatchingColor, R
 	return false;
 }
 
-public static String getPath(String fileName) {
-	URI uri;
-	String pluginPath = System.getProperty("PLUGIN_PATH");
-	if (pluginPath == null) {
-		URL url = SwtTestUtil.class.getResource(fileName);
-		assertNotNull(url, "URL == null for file " + fileName);
-		try {
-			uri = url.toURI();
-		} catch (URISyntaxException e) {
+public static String getPath(String fileName, TemporaryFolder tempFolder) {
+	Path filePath = tempFolder.getRoot().toPath().resolve("image-resources").resolve(Path.of(fileName));
+	if (!Files.isRegularFile(filePath)) {
+		// Extract resource on the classpath to a temporary file to ensure it's
+		// available as plain file, even if this bundle is packed as jar
+		try (InputStream inStream = SwtTestUtil.class.getResourceAsStream(fileName)) {
+			assertNotNull(inStream, "InputStream == null for file " + fileName);
+			Files.createDirectories(filePath.getParent());
+			Files.copy(inStream, filePath);
+		} catch (IOException e) {
 			throw new IllegalArgumentException(e);
 		}
-	} else {
-		uri = URI.create(pluginPath + "/data/" + fileName);
-	}
-	// Fallback when test is locally executed as plug-in test
-	Path path = Path.of(uri);
-	if (!Files.exists(path)) {
-		path = Path.of("data/" + fileName).toAbsolutePath();
 	}
-	assertTrue(Files.exists(path), "file not found: " + uri);
-	return path.toString();
+	return filePath.toString();
 }
 }

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_Image.java

@@ -16,7 +16,6 @@
 
 
 import static org.eclipse.swt.tests.junit.SwtTestUtil.assertSWTProblem;
-import static org.eclipse.swt.tests.junit.SwtTestUtil.getPath;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
@@ -49,7 +48,9 @@
 import org.eclipse.swt.internal.DPIUtil;
 import org.eclipse.swt.widgets.Display;
 import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 /**
  * Automated Test Suite for class org.eclipse.swt.graphics.Image
@@ -58,6 +59,14 @@
  */
 @SuppressWarnings("restriction")
 public class Test_org_eclipse_swt_graphics_Image {
+
+	@ClassRule
+	public static TemporaryFolder tempFolder = new TemporaryFolder();
+
+	private static String getPath(String fileName) {
+		return SwtTestUtil.getPath(fileName, tempFolder);
+	}
+
 	ImageFileNameProvider imageFileNameProvider = zoom -> {
 		String fileName = switch (zoom) {
 		case 100 -> "collapseall.png";
@@ -319,11 +328,11 @@ public void test_ConstructorLorg_eclipse_swt_graphics_DeviceLjava_lang_String()
 
 @Test
 public void test_ConstructorLorg_eclipse_swt_graphics_Device_ImageFileNameProvider() {
-	 Exception e;
+	Exception e;
 
 	// Null provider
 	ImageFileNameProvider provider1 = null;
-	  e = assertThrows(IllegalArgumentException.class, ()->new Image(display, provider1));
+	e = assertThrows(IllegalArgumentException.class, ()->new Image(display, provider1));
 	assertSWTProblem("Incorrect exception thrown for provider == null", SWT.ERROR_NULL_ARGUMENT, e);
 
 	// Invalid provider

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_internal_SVGRasterizer.java

@@ -13,7 +13,6 @@
 package org.eclipse.swt.tests.junit;
 
 import static org.eclipse.swt.tests.junit.SwtTestUtil.assertSWTProblem;
-import static org.eclipse.swt.tests.junit.SwtTestUtil.getPath;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import org.eclipse.swt.SWT;
@@ -23,7 +22,9 @@
 import org.eclipse.swt.graphics.ImageDataProvider;
 import org.eclipse.swt.graphics.ImageFileNameProvider;
 import org.eclipse.swt.widgets.Display;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 /**
  * When executed locally (outside Tycho build), this tests needs to be run as
@@ -32,6 +33,13 @@
  */
 public class Test_org_eclipse_swt_internal_SVGRasterizer {
 
+	@ClassRule
+	public static TemporaryFolder tempFolder = new TemporaryFolder();
+
+	private static String getPath(String fileName) {
+		return SwtTestUtil.getPath(fileName, tempFolder);
+	}
+
 	@Test
 	public void test_ConstructorLorg_eclipse_swt_graphics_Device_ImageFileNameProvider() {
 		ImageFileNameProvider validImageFileNameProvider = zoom -> getPath("collapseall.svg");