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setup-python/node_modules/ts-jest/dist/util/testing.d.ts
Danny McCormick 39c08a0eaa Initial pass
2019-06-26 21:12:00 -04:00

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1.8 KiB
TypeScript

/// <reference types="jest" />
declare type MockableFunction = (...args: any[]) => any;
declare type MethodKeysOf<T> = {
[K in keyof T]: T[K] extends MockableFunction ? K : never;
}[keyof T];
declare type PropertyKeysOf<T> = {
[K in keyof T]: T[K] extends MockableFunction ? never : K;
}[keyof T];
declare type ArgumentsOf<T> = T extends (...args: infer A) => any ? A : never;
declare type ConstructorArgumentsOf<T> = T extends new (...args: infer A) => any ? A : never;
interface MockWithArgs<T extends MockableFunction> extends jest.MockInstance<ReturnType<T>, ArgumentsOf<T>> {
new (...args: ConstructorArgumentsOf<T>): T;
(...args: ArgumentsOf<T>): ReturnType<T>;
}
declare type MaybeMockedConstructor<T> = T extends new (...args: any[]) => infer R ? jest.MockInstance<R, ConstructorArgumentsOf<T>> : {};
declare type MockedFunction<T extends MockableFunction> = MockWithArgs<T> & {
[K in keyof T]: T[K];
};
declare type MockedFunctionDeep<T extends MockableFunction> = MockWithArgs<T> & MockedObjectDeep<T>;
declare type MockedObject<T> = MaybeMockedConstructor<T> & {
[K in MethodKeysOf<T>]: T[K] extends MockableFunction ? MockedFunction<T[K]> : T[K];
} & {
[K in PropertyKeysOf<T>]: T[K];
};
declare type MockedObjectDeep<T> = MaybeMockedConstructor<T> & {
[K in MethodKeysOf<T>]: T[K] extends MockableFunction ? MockedFunctionDeep<T[K]> : T[K];
} & {
[K in PropertyKeysOf<T>]: MaybeMockedDeep<T[K]>;
};
export declare type MaybeMockedDeep<T> = T extends MockableFunction ? MockedFunctionDeep<T> : T extends object ? MockedObjectDeep<T> : T;
export declare type MaybeMocked<T> = T extends MockableFunction ? MockedFunction<T> : T extends object ? MockedObject<T> : T;
export declare function mocked<T>(item: T, deep?: false): MaybeMocked<T>;
export declare function mocked<T>(item: T, deep: true): MaybeMockedDeep<T>;
export {};