function newGuid() {
  return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, (c) => {
    // tslint:disable:no-bitwise
    const r = (Math.random() * 16) | 0;
    const v = c === "x" ? r : (r & 0x3) | 0x8;
    return v.toString(16);
  });
}

export function GetUniqueString(prefix: string = "") {
  return prefix + "_" + newGuid();
}

export function BuildTestObject<T, K extends keyof T = keyof T>(
  def: Partial<Pick<T, K>> | T,
  constructor?: new () => T
): T {
  return Object.assign(constructor === null ? {} : new constructor(), def) as T;
}