add regression test for svg feature

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/ImageLoader.java

@@ -193,7 +193,7 @@ public ImageData[] load(InputStream stream, int zoom) {
 				}
 			}
 		} catch (IOException e) {
-			//ignore.
+			SWT.error(SWT.ERROR_INVALID_IMAGE);
 		}
 	}
 	return loadDefault(stream);

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

@@ -0,0 +1,93 @@
+package org.eclipse.swt.tests.junit;
+
+import static org.eclipse.swt.tests.junit.SwtTestUtil.assertSWTProblem;
+import static org.junit.Assert.fail;
+
+import java.io.File;
+import java.net.URL;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.SWTException;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.ImageDataProvider;
+import org.eclipse.swt.graphics.ImageFileNameProvider;
+import org.eclipse.swt.widgets.Display;
+import org.junit.Before;
+import org.junit.Test;
+
+public class Test_org_eclipse_swt_graphics_SVGRasterizer {
+	Display display;
+
+	ImageFileNameProvider imageFileNameProvider = zoom -> {
+		String fileName = "collapseall.svg";
+		return getPath(fileName);
+	};
+
+	ImageDataProvider imageDataProvider = zoom -> {
+		String fileName = "collapseall.svg";
+		return new ImageData(getPath(fileName), zoom);
+	};
+
+	@Before
+	public void setUp() {
+		display = Display.getDefault();
+	}
+
+	String getPath(String fileName) {
+		String urlPath;
+		String pluginPath = System.getProperty("PLUGIN_PATH");
+		if (pluginPath == null) {
+			URL url = getClass().getClassLoader().getResource(fileName);
+			if (url == null) {
+				fail("URL == null for file " + fileName);
+			}
+			urlPath = url.getFile();
+		} else {
+			urlPath = pluginPath + "/data/" + fileName;
+		}
+
+		if (File.separatorChar != '/') urlPath = urlPath.replace('/', File.separatorChar);
+		if (SwtTestUtil.isWindows && urlPath.indexOf(File.separatorChar) == 0) urlPath = urlPath.substring(1);
+		urlPath = urlPath.replaceAll("%20", " ");
+		return urlPath;
+	}
+
+	@Test
+	public void test_ConstructorLorg_eclipse_swt_graphics_Device_ImageFileNameProvider() {
+		// Valid provider
+		Image image = new Image(display, imageFileNameProvider);
+		image.dispose();
+		// Corrupt Image provider
+		ImageFileNameProvider provider = zoom -> {
+			String fileName = "corrupt.svg";
+			return getPath(fileName);
+		};
+		try {
+			image = new Image(display, provider);
+			image.dispose();
+			fail("No exception thrown for corrupt image file.");
+		} catch (SWTException e) {
+			assertSWTProblem("Incorrect exception thrown for provider with corrupt images", SWT.ERROR_INVALID_IMAGE, e);
+		}
+	}
+
+	@Test
+	public void test_ConstructorLorg_eclipse_swt_graphics_Device_ImageDataProvider() {
+		// Valid provider
+		Image image = new Image(display, imageDataProvider);
+		image.dispose();
+		// Corrupt Image provider
+		ImageDataProvider provider = zoom -> {
+			String fileName = "corrupt.svg";
+			return new ImageData(getPath(fileName), zoom);
+		};
+		try {
+			image = new Image(display, provider);
+			image.dispose();
+			fail("No exception thrown for corrupt image file.");
+		} catch (SWTException e) {
+			assertSWTProblem("Incorrect exception thrown for provider with corrupt images", SWT.ERROR_INVALID_IMAGE, e);
+		}
+	}
+}