Function stubInterface

cli/src/cli/readline.test.ts:24–43

(questionImpl: ReadlinePromisesInterface['question'], closeMock = jest.fn())

    });

    function stubInterface(questionImpl: ReadlinePromisesInterface['question'], closeMock = jest.fn()) {
        const listeners = new Map<string, Set<(...args: unknown[]) => void>>();
        const stub = {
            question: questionImpl,
            close: (...args: unknown[]) => {
                closeMock(...args);
                stub.emit('close');
            },
            on: jest.fn((event: string, listener: (...args: unknown[]) => void) => {
                let set = listeners.get(event);
                if (!set) {
                    set = new Set();
                    listeners.set(event, set);
                }
                set.add(listener);
            }),
            once: jest.fn((event: string, listener: (...args: unknown[]) => void) => {
                let set = listeners.get(event);
                if (!set) {
                    set = new Set();
                    listeners.set(event, set);
                }
                set.add(listener);