Add regression test for aggressive cancelation

Ensure commands run after a command is canceled are not themselves
canceled.

Author: hinerm

src/test/java/org/scijava/command/CommandModuleTest.java

@@ -58,8 +58,12 @@ public void testCancelable() throws InterruptedException, ExecutionException {
 		assertTrue(c.isCanceled());
 		assertEquals("Stop! Collaborate and listen!", ice.getCancelReason());
 		assertEquals("Stop! Collaborate and listen!", c.getCancelReason());
+
+		final CommandModule crow = commandService.run(CrowCommand.class, true).get();
+		assertFalse(crow.isCanceled());
 	}
-	
+
+
 	@Test
 	public void testNotCancelable() throws InterruptedException,
 		ExecutionException
@@ -98,6 +102,16 @@ public void run() {
 		}
 	}
 
+	/** A {@link Cancelable} command which is not auto-canceled. */
+	@Plugin(type = Command.class)
+	public static class CrowCommand extends ContextCommand {
+
+		@Override
+		public void run() {
+			// everything's good
+		}
+	}
+
 	@Plugin(type = PreprocessorPlugin.class)
 	public static class CommandCanceler extends AbstractPreprocessorPlugin {