add tests for useControlledState

Author: dartess

internal/test/utils.tsx

@@ -1,10 +1,7 @@
 import * as React from "react";
-import { act } from "react-dom/test-utils";
 import type { MatcherFunction } from "@testing-library/react";
 import { render as tlRender, fireEvent } from "@testing-library/react";
 import { renderHook as tlRenderHook } from "@testing-library/react-hooks";
-import { fireEvent as fireDomEvent } from "@testing-library/dom";
-import userEvent from "@testing-library/user-event";
 import type {
 	RenderHookOptions,
 	RenderHookResult,
@@ -142,7 +139,10 @@ export function simulateEnterKeyClick(
 
 type Query = (f: MatcherFunction) => HTMLElement | null;
 
-export { cleanup as cleanupHooks } from "@testing-library/react-hooks";
-export { cleanup, fireEvent, screen } from "@testing-library/react";
-export { act, userEvent, fireDomEvent };
+export {
+	cleanup as cleanupHooks,
+	act as actHooks,
+} from "@testing-library/react-hooks";
+export { cleanup, fireEvent, screen, act } from "@testing-library/react";
+export * as userEvent from "@testing-library/user-event";
 export type { RenderOptions, RenderResult };

packages/utils/__tests__/use-controlled-state.test.ts

@@ -0,0 +1,50 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { renderHook, cleanupHooks, actHooks } from "@reach-internal/test/utils";
+import { useControlledState } from "@reach/utils";
+
+afterEach(cleanupHooks);
+
+describe("useControlledState", () => {
+	const DEFAULT_VALUE = 10;
+	const CONTROLLED_VALUE = 42;
+
+	it("should return value and setter", () => {
+		const { result } = renderHook(() =>
+			useControlledState({
+				defaultValue: DEFAULT_VALUE,
+				controlledValue: undefined,
+			})
+		);
+
+		expect(result.current[0]).toBe(DEFAULT_VALUE);
+		expect(typeof result.current[1]).toBe("function");
+	});
+
+	it("should work as uncontrolled", () => {
+		const { result } = renderHook(() =>
+			useControlledState({
+				defaultValue: DEFAULT_VALUE,
+				controlledValue: undefined,
+			})
+		);
+		expect(result.current[0]).toBe(DEFAULT_VALUE);
+		actHooks(() => {
+			result.current[1](17);
+		});
+		expect(result.current[0]).toBe(17);
+	});
+
+	it("should work as controlled", () => {
+		const { result } = renderHook(() =>
+			useControlledState({
+				defaultValue: DEFAULT_VALUE,
+				controlledValue: CONTROLLED_VALUE,
+			})
+		);
+		expect(result.current[0]).toBe(CONTROLLED_VALUE);
+		actHooks(() => {
+			result.current[1](17);
+		});
+		expect(result.current[0]).toBe(CONTROLLED_VALUE);
+	});
+});