Extract interface as method return

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc-swt/src/test/java/net/bigeon/gclc/swt/PromptReadingRunnableTest.java

@@ -50,8 +50,7 @@ import java.util.logging.Logger;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Label;
 import org.junit.Test;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
+import org.mockito.Mockito;
 
 import net.bigeon.gclc.swt.tools.PromptReadingRunnable;
 
@@ -61,16 +60,10 @@ public class PromptReadingRunnableTest {
     private final Display display = mock(Display.class);
     {
         when(view.getDisplay()).thenReturn(display);
-        doAnswer(new Answer<Object>() {
-            /* (non-Javadoc)
-             * @see
-             * org.mockito.stubbing.Answer#answer(org.mockito.invocation.InvocationOnMock) */
-            @Override
-            public Object answer(final InvocationOnMock invocation) throws Throwable {
-                final Runnable runnable = invocation.getArgument(0);
-                runnable.run();
-                return null;
-            }
+        doAnswer(invocation -> {
+            final Runnable runnable = invocation.getArgument(0);
+            runnable.run();
+            return null;
         }).when(display).syncExec(any(Runnable.class));
     }
 
@@ -85,6 +78,7 @@ public class PromptReadingRunnableTest {
         final PromptReadingRunnable runnable = new PromptReadingRunnable(reader, view);
 
         runnable.run();
+        Mockito.verify(reader, Mockito.times(3)).readLine();
     }
 
     /** Test method for {@link net.bigeon.gclc.swt.tools.PromptReadingRunnable#run()}.
@@ -102,6 +96,7 @@ public class PromptReadingRunnableTest {
 
         runnable.run();
         logger.setLevel(back);
+        Mockito.verify(reader, Mockito.times(3)).readLine();
     }
 
 }