Fix flakey ModelPicker test (#4972)

webview-ui/src/components/settings/ModelPicker.tsx

@@ -59,6 +59,8 @@ export const ModelPicker = ({
 	const [isDescriptionExpanded, setIsDescriptionExpanded] = useState(false)
 	const isInitialized = useRef(false)
 	const searchInputRef = useRef<HTMLInputElement>(null)
+	const selectTimeoutRef = useRef<NodeJS.Timeout | null>(null)
+	const closeTimeoutRef = useRef<NodeJS.Timeout | null>(null)
 
 	const modelIds = useMemo(() => {
 		const filteredModels = filterModels(models, apiConfiguration.apiProvider, organizationAllowList)
@@ -79,8 +81,13 @@ export const ModelPicker = ({
 			setOpen(false)
 			setApiConfigurationField(modelIdKey, modelId)
 
+			// Clear any existing timeout
+			if (selectTimeoutRef.current) {
+				clearTimeout(selectTimeoutRef.current)
+			}
+
 			// Delay to ensure the popover is closed before setting the search value.
-			setTimeout(() => setSearchValue(modelId), 100)
+			selectTimeoutRef.current = setTimeout(() => setSearchValue(modelId), 100)
 		},
 		[modelIdKey, setApiConfigurationField],
 	)
@@ -91,8 +98,13 @@ export const ModelPicker = ({
 
 			// Abandon the current search if the popover is closed.
 			if (!open) {
+				// Clear any existing timeout
+				if (closeTimeoutRef.current) {
+					clearTimeout(closeTimeoutRef.current)
+				}
+
 				// Delay to ensure the popover is closed before setting the search value.
-				setTimeout(() => setSearchValue(selectedModelId), 100)
+				closeTimeoutRef.current = setTimeout(() => setSearchValue(selectedModelId), 100)
 			}
 		},
 		[selectedModelId],
@@ -112,6 +124,18 @@ export const ModelPicker = ({
 		isInitialized.current = true
 	}, [modelIds, setApiConfigurationField, modelIdKey, selectedModelId, defaultModelId])
 
+	// Cleanup timeouts on unmount to prevent test flakiness
+	useEffect(() => {
+		return () => {
+			if (selectTimeoutRef.current) {
+				clearTimeout(selectTimeoutRef.current)
+			}
+			if (closeTimeoutRef.current) {
+				clearTimeout(closeTimeoutRef.current)
+			}
+		}
+	}, [])
+
 	return (
 		<>
 			<div>

webview-ui/src/components/settings/__tests__/ModelPicker.spec.tsx

@@ -3,6 +3,7 @@
 import { screen, fireEvent, render } from "@testing-library/react"
 import { act } from "react"
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query"
+import { vi } from "vitest"
 
 import { ModelInfo } from "@roo-code/types"
 
@@ -58,6 +59,13 @@ describe("ModelPicker", () => {
 
 	beforeEach(() => {
 		vi.clearAllMocks()
+		vi.useFakeTimers()
+	})
+
+	afterEach(() => {
+		// Clear any pending timers to prevent test flakiness
+		vi.clearAllTimers()
+		vi.useRealTimers()
 	})
 
 	it("calls setApiConfigurationField when a model is selected", async () => {
@@ -71,7 +79,7 @@ describe("ModelPicker", () => {
 
 		// Wait for popover to open and animations to complete.
 		await act(async () => {
-			await new Promise((resolve) => setTimeout(resolve, 100))
+			vi.advanceTimersByTime(100)
 		})
 
 		await act(async () => {
@@ -87,6 +95,11 @@ describe("ModelPicker", () => {
 			fireEvent.click(modelItem)
 		})
 
+		// Advance timers to trigger the setTimeout in onSelect
+		await act(async () => {
+			vi.advanceTimersByTime(100)
+		})
+
 		// Verify the API config was updated.
 		expect(mockSetApiConfigurationField).toHaveBeenCalledWith(defaultProps.modelIdKey, "model2")
 	})
@@ -102,7 +115,7 @@ describe("ModelPicker", () => {
 
 		// Wait for popover to open and animations to complete.
 		await act(async () => {
-			await new Promise((resolve) => setTimeout(resolve, 100))
+			vi.advanceTimersByTime(100)
 		})
 
 		const customModelId = "custom-model-id"
@@ -115,7 +128,7 @@ describe("ModelPicker", () => {
 
 		// Wait for the UI to update
 		await act(async () => {
-			await new Promise((resolve) => setTimeout(resolve, 100))
+			vi.advanceTimersByTime(100)
 		})
 
 		// Find and click the "Use custom" option
@@ -125,6 +138,11 @@ describe("ModelPicker", () => {
 			fireEvent.click(customOption)
 		})
 
+		// Advance timers to trigger the setTimeout in onSelect
+		await act(async () => {
+			vi.advanceTimersByTime(100)
+		})
+
 		// Verify the API config was updated with the custom model ID
 		expect(mockSetApiConfigurationField).toHaveBeenCalledWith(defaultProps.modelIdKey, customModelId)
 	})