fix(UIScrollView): assert on scrolling when view is not visible.

This fixes the bug reported on this issue: wix#2834.

detox/ios/Detox/Actions/UIScrollView+DetoxActions.m

@@ -266,6 +266,8 @@ - (void)dtx_scrollWithOffset:(CGPoint)offset normalizedStartingPoint:(CGPoint)no
 
 - (void)_dtx_scrollWithOffset:(CGPoint)offset normalizedStartingPoint:(CGPoint)normalizedStartingPoint strict:(BOOL)strict
 {
+	[self dtx_assertVisibleWithPercent:@1];
+
 	if(offset.x == 0.0 && offset.y == 0.0)
 	{
 		return;

detox/ios/Detox/Utilities/NSObject+DetoxUtils.h

@@ -33,6 +33,7 @@ static double LNLinearInterpolate(CGFloat from, CGFloat to, CGFloat p)
 @property (nonatomic, readonly) CGRect dtx_visibleBounds;
 
 - (BOOL)dtx_isVisible;
+- (void)dtx_assertVisibleWithPercent:(nullable NSNumber *)percent;
 - (BOOL)dtx_isVisibleAtRect:(CGRect)rect percent:(nullable NSNumber *)percent
 					  error:(NSError* __strong * __nullable)error;
 - (void)dtx_assertVisible;

detox/ios/Detox/Utilities/NSObject+DetoxUtils.m

@@ -146,10 +146,14 @@ - (BOOL)dtx_isVisibleAtRect:(CGRect)rect percent:(nullable NSNumber *)percent
 }
 
 - (void)dtx_assertVisible {
-	[self dtx_assertVisibleAtRect:self.dtx_bounds percent:nil];
+	[self dtx_assertVisibleWithPercent:nil];
 }
 
-- (void)dtx_assertVisibleAtRect:(CGRect)rect percent:(NSNumber *)percent {
+- (void)dtx_assertVisibleWithPercent:(nullable NSNumber *)percent {
+  [self dtx_assertVisibleAtRect:self.dtx_bounds percent:percent];
+}
+
+- (void)dtx_assertVisibleAtRect:(CGRect)rect percent:(nullable NSNumber *)percent {
 	[self.dtx_view dtx_assertVisibleAtRect:rect percent:percent];
 }
 

detox/ios/Detox/Utilities/UIView+DetoxUtils.m

@@ -277,10 +277,8 @@ - (BOOL)_dtx_testVisibilityInRect:(CGRect)rect percent:(NSUInteger)percent
 	CGRect testedRegionInWindowCoords = [windowToUse convertRect:rect fromView:self];
 
 	CGRect visibleBounds = self.dtx_visibleBounds;
-
-	if (CGRectIsNull(visibleBounds) || [self _dtx_isRegionObscured:visibleBounds
-		 										  fromTestedRegion:self.dtx_visibleBounds
-														   percent:percent]) {
+	if (CGRectIsNull(visibleBounds) || CGRectIsEmpty(visibleBounds) ||
+		[self _dtx_isRegionObscured:visibleBounds fromTestedRegion:visibleBounds percent:percent]) {
 		auto errorDescription = [NSString stringWithFormat:@"View is clipped by one or more of its "
 								 "superviews' bounds and does not pass visibility percent "
 								 "threshold (%lu)", (unsigned long)percent];