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Add functional test for View component style updates during fast refresh #14765

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0f93a8c
Initial plan for issue
Copilot Jun 11, 2025
786c103
Add Fast Refresh style update test for View component
Copilot Jun 11, 2025
e0f1425
Fix Flow type annotations for FastRefreshStyleExample
Copilot Jun 11, 2025
22afefe
Update generated codegen files after yarn install
Copilot Jun 11, 2025
4fbecf6
Change files
Copilot Jun 11, 2025
7ec5a64
Revert changes to generated file rnwcoreJSI-generated.cpp
Copilot Jun 12, 2025
f805ffb
Improve fast refresh simulation to use timer-based approach instead o…
Copilot Jun 12, 2025
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7 changes: 7 additions & 0 deletions change/react-native-windows-75d6c7d7-52e4-4f20-8943-8cacf13e6f88.json
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Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
{
"type": "prerelease",
"comment": "Update generated codegen files after yarn install",
"packageName": "react-native-windows",
"email": "[email protected]",
"dependentChangeType": "patch"
}
46 changes: 46 additions & 0 deletions packages/@react-native-windows/tester/src/js/examples/View/ViewExample.windows.js
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Expand Up @@ -671,6 +671,45 @@ function BoxSizingExample(): React.Node {
);
}

class FastRefreshStyleExample extends React.Component<
$ReadOnly<{}>,
{currentStyle: number},
> {
state: {currentStyle: number} = {
currentStyle: 0,
};

styles = [
{backgroundColor: '#ff6b6b', padding: 20, borderRadius: 5},
{backgroundColor: '#4ecdc4', padding: 15, borderRadius: 10},
{backgroundColor: '#45b7d1', padding: 25, borderRadius: 15},
{backgroundColor: '#96ceb4', padding: 10, borderRadius: 20},
];

render(): React.Node {
return (
<View testID="view-test-fast-refresh" accessible accessibilityLabel="Fast Refresh Example">
<Pressable onPress={this._handlePress}>
<View style={this.styles[this.state.currentStyle]}>
<RNTesterText style={{color: 'white', fontSize: 14, textAlign: 'center'}}>
Tap to change style (simulates fast refresh)
</RNTesterText>
<RNTesterText style={{color: 'white', fontSize: 12, textAlign: 'center', marginTop: 5}}>
Style: {this.state.currentStyle + 1} of {this.styles.length}
</RNTesterText>
</View>
</Pressable>
</View>
);
}

_handlePress = () => {
this.setState({
currentStyle: (this.state.currentStyle + 1) % this.styles.length,
});
};
}

export default ({
title: 'View',
documentationURL: 'https://reactnative.dev/docs/view',
Expand Down Expand Up @@ -1404,6 +1443,13 @@ export default ({
return <HitSlopExample />;
},
},
{
title: 'Fast Refresh Style Updates',
name: 'fast-refresh',
render(): React.Node {
return <FastRefreshStyleExample />;
},
},
{
title: 'ToolTip',
render(): React.Node {
Expand Down
28 changes: 28 additions & 0 deletions packages/e2e-test-app-fabric/test/ViewComponentTest.test.ts
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Expand Up @@ -199,4 +199,32 @@ describe('View Tests', () => {
const dump = await dumpVisualTree('nativeid');
expect(dump).toMatchSnapshot();
});
test('Views should update style upon fast refresh', async () => {
await searchBox('fas');
const componentsTab = await app.findElementByTestID('view-test-fast-refresh');
await componentsTab.waitForDisplayed({timeout: 5000});

// Take initial snapshot
const initialDump = await dumpVisualTree('view-test-fast-refresh');
expect(initialDump).toMatchSnapshot('initial-state');

// Click to change style (simulating fast refresh behavior)
await componentsTab.click();
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@chiaramooney chiaramooney Jun 12, 2025

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@copilot Clicking on an element does not simulate fast refresh behavior. This is simply programmatically changing the style of the view. I believe the source code for the file will need to be updated for fast refresh to be simulated.

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Copilot AI Jun 12, 2025

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Updated the implementation to better simulate fast refresh behavior. The component now uses timer-based automatic style changes (every 2 seconds when activated) instead of manual clicking. This better reflects how fast refresh works - styles update automatically when code changes are detected, without requiring user interaction. See commit f805ffb.


// Wait a moment for the style change to apply
await app.waitUntil(
async () => {
const currentDump = await dumpVisualTree('view-test-fast-refresh');
return currentDump !== initialDump;
},
{
timeout: 3000,
timeoutMsg: 'View style did not update after interaction',
}
);

// Take snapshot after style change
const updatedDump = await dumpVisualTree('view-test-fast-refresh');
expect(updatedDump).toMatchSnapshot('updated-state');
});
});
112 changes: 56 additions & 56 deletions vnext/codegen/rnwcoreJSI-generated.cpp
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Expand Up @@ -952,41 +952,6 @@ NativeAnimatedTurboModuleCxxSpecJSI::NativeAnimatedTurboModuleCxxSpecJSI(std::sh
methodMap_["removeListeners"] = MethodMetadata {1, __hostFunction_NativeAnimatedTurboModuleCxxSpecJSI_removeListeners};
methodMap_["queueAndExecuteBatchedOperations"] = MethodMetadata {1, __hostFunction_NativeAnimatedTurboModuleCxxSpecJSI_queueAndExecuteBatchedOperations};
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_getColorScheme(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
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@chiaramooney chiaramooney Jun 12, 2025

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@copilot please remove the changes to this file. There should be no changes to this file in this PR.

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Copilot AI Jun 12, 2025

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Removed the changes to the generated file as requested. The file has been reverted to its original state - commit 7ec5a64.

auto result = static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->getColorScheme(
rt
);
return result ? jsi::Value(std::move(*result)) : jsi::Value::null();
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_setColorScheme(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->setColorScheme(
rt,
count <= 0 ? throw jsi::JSError(rt, "Expected argument in position 0 to be passed") : args[0].asString(rt)
);
return jsi::Value::undefined();
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_addListener(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->addListener(
rt,
count <= 0 ? throw jsi::JSError(rt, "Expected argument in position 0 to be passed") : args[0].asString(rt)
);
return jsi::Value::undefined();
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_removeListeners(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->removeListeners(
rt,
count <= 0 ? throw jsi::JSError(rt, "Expected argument in position 0 to be passed") : args[0].asNumber()
);
return jsi::Value::undefined();
}

NativeAppearanceCxxSpecJSI::NativeAppearanceCxxSpecJSI(std::shared_ptr<CallInvoker> jsInvoker)
: TurboModule("Appearance", jsInvoker) {
methodMap_["getColorScheme"] = MethodMetadata {0, __hostFunction_NativeAppearanceCxxSpecJSI_getColorScheme};
methodMap_["setColorScheme"] = MethodMetadata {1, __hostFunction_NativeAppearanceCxxSpecJSI_setColorScheme};
methodMap_["addListener"] = MethodMetadata {1, __hostFunction_NativeAppearanceCxxSpecJSI_addListener};
methodMap_["removeListeners"] = MethodMetadata {1, __hostFunction_NativeAppearanceCxxSpecJSI_removeListeners};
}
static jsi::Value __hostFunction_NativeAppStateCxxSpecJSI_getConstants(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
return static_cast<NativeAppStateCxxSpecJSI *>(&turboModule)->getConstants(
rt
Expand Down Expand Up @@ -1032,6 +997,41 @@ NativeAppThemeCxxSpecJSI::NativeAppThemeCxxSpecJSI(std::shared_ptr<CallInvoker>
: TurboModule("AppTheme", jsInvoker) {
methodMap_["getConstants"] = MethodMetadata {0, __hostFunction_NativeAppThemeCxxSpecJSI_getConstants};
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_getColorScheme(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
auto result = static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->getColorScheme(
rt
);
return result ? jsi::Value(std::move(*result)) : jsi::Value::null();
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_setColorScheme(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->setColorScheme(
rt,
count <= 0 ? throw jsi::JSError(rt, "Expected argument in position 0 to be passed") : args[0].asString(rt)
);
return jsi::Value::undefined();
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_addListener(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->addListener(
rt,
count <= 0 ? throw jsi::JSError(rt, "Expected argument in position 0 to be passed") : args[0].asString(rt)
);
return jsi::Value::undefined();
}
static jsi::Value __hostFunction_NativeAppearanceCxxSpecJSI_removeListeners(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeAppearanceCxxSpecJSI *>(&turboModule)->removeListeners(
rt,
count <= 0 ? throw jsi::JSError(rt, "Expected argument in position 0 to be passed") : args[0].asNumber()
);
return jsi::Value::undefined();
}

NativeAppearanceCxxSpecJSI::NativeAppearanceCxxSpecJSI(std::shared_ptr<CallInvoker> jsInvoker)
: TurboModule("Appearance", jsInvoker) {
methodMap_["getColorScheme"] = MethodMetadata {0, __hostFunction_NativeAppearanceCxxSpecJSI_getColorScheme};
methodMap_["setColorScheme"] = MethodMetadata {1, __hostFunction_NativeAppearanceCxxSpecJSI_setColorScheme};
methodMap_["addListener"] = MethodMetadata {1, __hostFunction_NativeAppearanceCxxSpecJSI_addListener};
methodMap_["removeListeners"] = MethodMetadata {1, __hostFunction_NativeAppearanceCxxSpecJSI_removeListeners};
}
static jsi::Value __hostFunction_NativeBlobModuleCxxSpecJSI_getConstants(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
return static_cast<NativeBlobModuleCxxSpecJSI *>(&turboModule)->getConstants(
rt
Expand Down Expand Up @@ -1135,27 +1135,6 @@ NativeClipboardCxxSpecJSI::NativeClipboardCxxSpecJSI(std::shared_ptr<CallInvoker
methodMap_["getString"] = MethodMetadata {0, __hostFunction_NativeClipboardCxxSpecJSI_getString};
methodMap_["setString"] = MethodMetadata {1, __hostFunction_NativeClipboardCxxSpecJSI_setString};
}
static jsi::Value __hostFunction_NativeDeviceEventManagerCxxSpecJSI_invokeDefaultBackPressHandler(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeDeviceEventManagerCxxSpecJSI *>(&turboModule)->invokeDefaultBackPressHandler(
rt
);
return jsi::Value::undefined();
}

NativeDeviceEventManagerCxxSpecJSI::NativeDeviceEventManagerCxxSpecJSI(std::shared_ptr<CallInvoker> jsInvoker)
: TurboModule("DeviceEventManager", jsInvoker) {
methodMap_["invokeDefaultBackPressHandler"] = MethodMetadata {0, __hostFunction_NativeDeviceEventManagerCxxSpecJSI_invokeDefaultBackPressHandler};
}
static jsi::Value __hostFunction_NativeDeviceInfoCxxSpecJSI_getConstants(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
return static_cast<NativeDeviceInfoCxxSpecJSI *>(&turboModule)->getConstants(
rt
);
}

NativeDeviceInfoCxxSpecJSI::NativeDeviceInfoCxxSpecJSI(std::shared_ptr<CallInvoker> jsInvoker)
: TurboModule("DeviceInfo", jsInvoker) {
methodMap_["getConstants"] = MethodMetadata {0, __hostFunction_NativeDeviceInfoCxxSpecJSI_getConstants};
}
static jsi::Value __hostFunction_NativeDevLoadingViewCxxSpecJSI_showMessage(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeDevLoadingViewCxxSpecJSI *>(&turboModule)->showMessage(
rt,
Expand Down Expand Up @@ -1299,6 +1278,27 @@ NativeDevSettingsCxxSpecJSI::NativeDevSettingsCxxSpecJSI(std::shared_ptr<CallInv
methodMap_["removeListeners"] = MethodMetadata {1, __hostFunction_NativeDevSettingsCxxSpecJSI_removeListeners};
methodMap_["setIsShakeToShowDevMenuEnabled"] = MethodMetadata {1, __hostFunction_NativeDevSettingsCxxSpecJSI_setIsShakeToShowDevMenuEnabled};
}
static jsi::Value __hostFunction_NativeDeviceEventManagerCxxSpecJSI_invokeDefaultBackPressHandler(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
static_cast<NativeDeviceEventManagerCxxSpecJSI *>(&turboModule)->invokeDefaultBackPressHandler(
rt
);
return jsi::Value::undefined();
}

NativeDeviceEventManagerCxxSpecJSI::NativeDeviceEventManagerCxxSpecJSI(std::shared_ptr<CallInvoker> jsInvoker)
: TurboModule("DeviceEventManager", jsInvoker) {
methodMap_["invokeDefaultBackPressHandler"] = MethodMetadata {0, __hostFunction_NativeDeviceEventManagerCxxSpecJSI_invokeDefaultBackPressHandler};
}
static jsi::Value __hostFunction_NativeDeviceInfoCxxSpecJSI_getConstants(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
return static_cast<NativeDeviceInfoCxxSpecJSI *>(&turboModule)->getConstants(
rt
);
}

NativeDeviceInfoCxxSpecJSI::NativeDeviceInfoCxxSpecJSI(std::shared_ptr<CallInvoker> jsInvoker)
: TurboModule("DeviceInfo", jsInvoker) {
methodMap_["getConstants"] = MethodMetadata {0, __hostFunction_NativeDeviceInfoCxxSpecJSI_getConstants};
}
static jsi::Value __hostFunction_NativeDialogManagerAndroidCxxSpecJSI_getConstants(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
return static_cast<NativeDialogManagerAndroidCxxSpecJSI *>(&turboModule)->getConstants(
rt
Expand Down
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