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50 lines
1.9 KiB
50 lines
1.9 KiB
2 years ago
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declare let spies: Set<SpyImpl<any[], any>>;
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declare type ReturnError = ['error', any];
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declare type ReturnOk<R> = ['ok', R];
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declare type ResultFn<R> = ReturnError | ReturnOk<R>;
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interface Spy<A extends any[] = any[], R = any> {
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called: boolean;
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callCount: number;
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calls: A[];
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length: number;
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results: ResultFn<R>[];
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returns: R[];
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nextError(error: any): this;
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nextResult(result: R): this;
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reset(): void;
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impl: ((...args: A) => R) | undefined;
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next: ResultFn<R> | null;
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}
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interface SpyImpl<A extends any[] = any[], R = any> extends Spy<A, R> {
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getOriginal(): (...args: A) => R;
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willCall(cb: (...args: A) => R): this;
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restore(): void;
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}
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interface SpyFn<A extends any[] = any[], R = any> extends Spy<A, R> {
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(...args: A): R;
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}
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declare function spy<A extends any[], R>(cb?: (...args: A) => R): SpyFn<A, R>;
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declare type Procedure = (...args: any[]) => any;
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declare type Methods<T> = {
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[K in keyof T]: T[K] extends Procedure ? K : never;
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}[keyof T];
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declare type Getters<T> = {
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[K in keyof T]: T[K] extends Procedure ? never : K;
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}[keyof T];
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declare type Classes<T> = {
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[K in keyof T]: T[K] extends new (...args: any[]) => any ? K : never;
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}[keyof T];
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declare function spyOn<T, S extends Getters<Required<T>>>(obj: T, methodName: {
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setter: S;
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}, mock?: (arg: T[S]) => void): SpyImpl<[T[S]], void>;
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declare function spyOn<T, G extends Getters<Required<T>>>(obj: T, methodName: {
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getter: G;
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}, mock?: () => T[G]): SpyImpl<[], T[G]>;
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declare function spyOn<T, M extends Classes<Required<T>>>(object: T, method: M): Required<T>[M] extends new (...args: infer A) => infer R ? SpyImpl<A, R> : never;
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declare function spyOn<T, M extends Methods<Required<T>>>(obj: T, methodName: M, mock?: T[M]): Required<T>[M] extends (...args: infer A) => infer R ? SpyImpl<A, R> : never;
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declare function restoreAll(): void;
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export { Spy, SpyFn, SpyImpl, restoreAll, spies, spy, spyOn };
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