Summary:
This unit test is to verify that the new diffing algorithm generates a "minimal" instruction set, with regards to removes and inserts ("moves").
These unit tests are here to verify the expected behavior in this new algorithm, but these tests may be modified or deleted in the future if we decide we want to change this behavior.
Changelog: [Internal] fabric unit test
Reviewed By: mdvacca
Differential Revision: D20706592
fbshipit-source-id: 5f9991498e0d788ecbf88d938bfe6d3f0f27af40
Summary:
Reasons:
* The name of the method now better represent what it's doing;
* It exposes information about "dirty" state of the node without opening actual `LayoutableShadowNode` protected APIs;
* It's a tiny bit faster now because it checks the flag before calling Yoga.
Changelog: [Internal] Fabric-specific internal change.
Reviewed By: sammy-SC
Differential Revision: D19596282
fbshipit-source-id: 3d87d9d5ba20bb8e360683f149b5ebf90beecd65
Summary:
Here is a mutation test for the Diffing algorithm that we use to diff ShadowNode trees and flatten them. As a side-effect, it also "tests" that Concurrent Yoga does not crash and produces decent cloning requests.
The test works this way:
1. We create a random ShadowNode tree;
2. We create a View tree from that that we continue to maintain;
3. We apply random mutation on this;
4. We layout the tree;
5. We generate the mutation instruction comparing a previous tree with a new one;
6. We apply mutations on the first tree;
7. We generate a new tree from scratch;
8. We compare the new tree with the tree updated with mutations and expect equivalence;
9. Repeat a million times.
Changelog: [Internal] Fabric-specific internal change.
Reviewed By: JoshuaGross, mdvacca
Differential Revision: D19357714
fbshipit-source-id: 04765ede87d91180952ae650ff0d505dfac2ed8e
Joshua Gross
Valentin Shergin