ImageReaderAbstractTest refactorings.

imageio/imageio-xwd/src/test/java/com/twelvemonkeys/imageio/plugins/xwd/XWDImageReaderTest.java

@@ -9,8 +9,10 @@ import java.util.Collections;
 import java.util.List;
 
 public class XWDImageReaderTest extends ImageReaderAbstractTest<XWDImageReader> {
-
-    private final XWDImageReaderSpi provider = new XWDImageReaderSpi();
+    @Override
+    protected ImageReaderSpi createProvider() {
+        return new XWDImageReaderSpi();
+    }
 
     @Override
     protected List<TestData> getTestData() {
@@ -21,21 +23,6 @@ public class XWDImageReaderTest extends ImageReaderAbstractTest<XWDImageReader>
         );
     }
 
-    @Override
-    protected ImageReaderSpi createProvider() {
-        return provider;
-    }
-
-    @Override
-    protected Class<XWDImageReader> getReaderClass() {
-        return XWDImageReader.class;
-    }
-
-    @Override
-    protected XWDImageReader createReader() {
-        return provider.createReaderInstance(null);
-    }
-
     @Override
     protected List<String> getFormatNames() {
         return Arrays.asList("xwd", "XWD");