class SpreadsheetImportHealthChecker implements HealthChecker<SpreadsheetImportActivity> {

	public boolean canVisit(Object subject) {
		return (subject != null && subject instanceof SpreadsheetImportActivity);
	}

}

class SpreadsheetImportHealthCheckerTest {

	private SpreadsheetImportHealthChecker healthChecker;
	private SpreadsheetImportActivity activity;
	private ArrayList ancestors;

	@Test
	public void testCanHandle() {

		assertTrue(healthChecker.canVisit(activity));
		assertFalse(healthChecker.canVisit(null));
		assertFalse(healthChecker.canVisit(""));
	}

}