Any ideas on how to implement pull to refresh with KIF Tests?

This is pretty open-ended.

Does anyone have an idea as to how to test pull-to-refresh functionality in KIF Tests?

Simply dragging from the top of the screen down to the bottom of the screen would do that, right? KIF has the following method implemented in the UIView-KIFAdditions category:

- (void)dragFromPoint:(CGPoint)startPoint toPoint:(CGPoint)endPoint;

I went ahead and created the following test step for simple dragging operations:

+ (id)stepToDragFromStartPoint:(CGPoint)startPoint toEndPoint:(CGPoint)endPoint
{
    NSString *description = [NSString stringWithFormat:@"Simulate dragging finger from point %.1f,%.1f to point %.1f,%.1f", startPoint.x, startPoint.y, endPoint.x, endPoint.y];
    return [KIFTestStep stepWithDescription:description executionBlock:^(KIFTestStep *step, NSError **error) {
        UIView *viewToSwipe = [UIApplication sharedApplication].keyWindow.subviews.lastObject;

        [viewToSwipe dragFromPoint:startPoint toPoint:endPoint];

        return KIFTestStepResultSuccess;
    }];
}

Hope that helps!