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website/node_modules/@base-ui/utils/testUtils.d.ts

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+/**
+ * Whether the test runs in JSDOM environment
+ */
+export declare const isJSDOM: boolean;
+export type IfEquals<T, U, Y = unknown, N = never> = (<G>() => G extends T ? 1 : 2) extends (<G>() => (G extends U ? 1 : 2)) ? Y : N;
+/**
+ * Issues a type error if `Expected` is not identical to `Actual`.
+ *
+ * `Expected` should be declared when invoking `expectType`.
+ * `Actual` should almost always we be a `typeof value` statement.
+ *
+ * @example `expectType<number | string, typeof value>(value)`
+ * TypeScript issues a type error since `value is not assignable to never`.
+ * This means `typeof value` is not identical to `number | string`
+ * @param _actual
+ */
+export declare function expectType<Expected, Actual>(_actual: IfEquals<Actual, Expected, Actual>): void;