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function getRandomInt(max: number) {  return Math.floor(Math.random() * Math.floor(max));}
export class Mocker {  pick = (...args: any[]) => {    return args[getRandomInt(args.length)];  };
  get string() {    return Math.random().toString(36).substring(7);  }  get number() {    return Math.random() * 100;  }  get bigint() {    return BigInt(Math.floor(Math.random() * 10000));  }  get boolean() {    return Math.random() < 0.5;  }  get date() {    return new Date(Math.floor(Date.now() * Math.random()));  }  get null(): null {    return null;  }  get undefined(): undefined {    return undefined;  }  get stringOptional() {    return this.pick(this.string, this.undefined);  }  get stringNullable() {    return this.pick(this.string, this.null);  }  get numberOptional() {    return this.pick(this.number, this.undefined);  }  get numberNullable() {    return this.pick(this.number, this.null);  }  get booleanOptional() {    return this.pick(this.boolean, this.undefined);  }  get booleanNullable() {    return this.pick(this.boolean, this.null);  }}