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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,9 @@ | ||
| module.exports = { | ||
| presets: ["module:metro-react-native-babel-preset"], | ||
| plugins: [ | ||
| "@babel/plugin-proposal-class-properties", | ||
| "@babel/plugin-proposal-private-methods", | ||
| "react-native-reanimated/plugin", | ||
| "inline-dotenv", | ||
| "@babel/plugin-syntax-dynamic-import", | ||
| ], | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| require("react-native-reanimated").setUpTests(); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| module.exports = { | ||
| preset: "react-native", | ||
| modulePathIgnorePatterns: [ | ||
| "example", | ||
| "docs", | ||
| "assets", | ||
| ".yarn", | ||
| "lib", | ||
| ".eslintrc", | ||
| ], | ||
| setupFiles: ["./jest-setup.js"], | ||
| setupFilesAfterEnv: ["@testing-library/jest-native/extend-expect"], | ||
| testEnvironment: "node", | ||
| transformIgnorePatterns: [], | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| import type { FC } from "react"; | ||
| import React from "react"; | ||
| import Animated, { useAnimatedStyle, useDerivedValue } from "react-native-reanimated"; | ||
| import renderer from "react-test-renderer"; | ||
|
|
||
| describe("useSharedValue", () => { | ||
| it("retains value on rerender", () => { | ||
| const initialValue = 0; | ||
| const updatedValue = 1; | ||
|
|
||
| interface Props { | ||
| key: string | ||
| value: number | ||
| } | ||
|
|
||
| const TestComponent: FC<Props> = (props) => { | ||
| const opacity = useDerivedValue(() => props.value, [props.value]); | ||
| const animatedStyle = useAnimatedStyle(() => ({ | ||
| opacity: opacity.value, | ||
| }), [opacity]); | ||
|
|
||
| return <Animated.View style={animatedStyle} />; | ||
| }; | ||
|
|
||
| // When rendering with initial value | ||
| const wrapper = renderer.create(<TestComponent key="box" value={initialValue} />); | ||
|
|
||
| expect( | ||
| typeof wrapper.root.children[0] !== "string" | ||
| ? wrapper.root.children[0].props.style.animatedStyle.current.value.opacity | ||
| : false, | ||
| ).toBe(initialValue); | ||
|
|
||
| // When rendering with updated value | ||
| wrapper.update(<TestComponent key="box" value={updatedValue} />); | ||
|
|
||
| expect( | ||
| typeof wrapper.root.children[0] !== "string" | ||
| ? wrapper.root.children[0].props.style.animatedStyle.current.value.opacity | ||
| : false, | ||
| ).toBe(initialValue); | ||
| }); | ||
| }); |
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