Improve sizing of views requiring multi-pass layout

MMMTestCase.podspec

@@ -6,7 +6,7 @@
 Pod::Spec.new do |s|
 
 	s.name = "MMMTestCase"
-	s.version = "1.11.0"
+	s.version = "1.12.0"
 	s.summary = "Our helpers for FBTestCase and XCTestCase"
 	s.description = s.summary
 	s.homepage = "https://github.com/mediamonks/#{s.name}"

Sources/MMMTestCaseObjC/MMMTestCase.m

@@ -557,16 +557,30 @@ - (void)verifyView:(UIView *)view fitSize:(CGSize)fitSize identifier:(NSString *
 		[window setWindowLevel:-1];
 		[window addSubview:view];
 
-		[view updateConstraintsIfNeeded];
-
-		size = [view
-			systemLayoutSizeFittingSize:CGSizeMake(
-				fitSize.width <= 0 ? 0 : fitSize.width,
-				fitSize.height <= 0 ? 0 : fitSize.height
-			)
-			withHorizontalFittingPriority:(fitSize.width <= 0) ? UILayoutPriorityFittingSizeLevel : UILayoutPriorityRequired
-			verticalFittingPriority:(fitSize.height <= 0) ? UILayoutPriorityFittingSizeLevel : UILayoutPriorityRequired
+		// A replacement for `systemLayoutSizeFittingSize` that should be able to handle cases where multi-pass layout is required.
+		NSLayoutConstraint *widthConstraint = [NSLayoutConstraint
+			constraintWithItem:view attribute:NSLayoutAttributeWidth
+			relatedBy:NSLayoutRelationEqual
+			toItem:nil attribute:NSLayoutAttributeNotAnAttribute
+			multiplier:1 constant:fitSize.width <= 0 ? 0 : fitSize.width
 		];
+		widthConstraint.priority = (fitSize.width <= 0) ? UILayoutPriorityFittingSizeLevel : UILayoutPriorityRequired;
+		NSLayoutConstraint *heightConstraint = [NSLayoutConstraint
+			constraintWithItem:view attribute:NSLayoutAttributeWidth
+			relatedBy:NSLayoutRelationEqual
+			toItem:nil attribute:NSLayoutAttributeNotAnAttribute
+			multiplier:1 constant:fitSize.height <= 0 ? 0 : fitSize.height
+		];
+		heightConstraint.priority = (fitSize.height <= 0) ? UILayoutPriorityFittingSizeLevel : UILayoutPriorityRequired;
+
+		[NSLayoutConstraint activateConstraints:@[widthConstraint, heightConstraint]];
+
+		// This should call those pending layoutIfNeeded, multiple times if needed.
+		[self pumpRunLoopABit];
+
+		[NSLayoutConstraint deactivateConstraints:@[widthConstraint, heightConstraint]];
+
+		size = view.bounds.size;
 	}
 
 	[outerContainer setChildView:view size:size];