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Fabric: Introducing LocalData concept

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Summary:
LocalData might be used to communicate some infomation between `ShadowNode`s
and native component views.

We will use it soon to store (and transmit to mounting layer) prepared for rendering attributed text in Text component.

Reviewed By: mdvacca

Differential Revision: D7738582

fbshipit-source-id: 1ead23ffd105cce0b3d9aeb9fc1d0df47673be50
This commit is contained in:
Valentin Shergin
2018-04-26 17:51:49 -07:00
committed by Facebook Github Bot
parent 9d08e2afae
commit 368388bfc8
5 changed files with 110 additions and 2 deletions
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29
ReactCommon/fabric/core/tests/ShadowNodeTest.cpp
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@@ -150,3 +150,32 @@ TEST(ShadowNodeTest, handleCloneFunction) {
ASSERT_EQ(secondNode->getRootTag(), secondNodeClone->getRootTag());
ASSERT_EQ(secondNode->getProps(), secondNodeClone->getProps());
}
TEST(ShadowNodeTest, handleLocalData) {
auto localData42 = std::make_shared<TestLocalData>();
localData42->setNumber(42);
auto anotherLocalData42 = std::make_shared<TestLocalData>();
anotherLocalData42->setNumber(42);
auto localDataOver9000 = std::make_shared<TestLocalData>();
localDataOver9000->setNumber(9001);
auto firstNode = std::make_shared<TestShadowNode>(9, 1, (void *)NULL);
auto secondNode = std::make_shared<TestShadowNode>(9, 1, (void *)NULL);
auto thirdNode = std::make_shared<TestShadowNode>(9, 1, (void *)NULL);
firstNode->setLocalData(localData42);
secondNode->setLocalData(localData42);
thirdNode->setLocalData(localDataOver9000);
// LocalData object are compared by pointer, not by value.
ASSERT_EQ(*firstNode, *secondNode);
ASSERT_NE(*firstNode, *thirdNode);
secondNode->setLocalData(anotherLocalData42);
ASSERT_NE(*firstNode, *secondNode);
// LocalData cannot be changed for sealed shadow node.
secondNode->sealRecursive();
ASSERT_ANY_THROW(secondNode->setLocalData(localDataOver9000));
}