How to use the @stoplight/prism-http/router/__tests__/utils.randomUrl function in @stoplight/prism-http

test('should not match if no server defined', async () => {
        const resource = await router.route({
          resources: [{
            id: chance.guid(),
            method: pickOneHttpMethod(),
            path: randomPath(),
            responses: [],
            servers: []
          }],
          input: {
            method: pickOneHttpMethod(),
            url: randomUrl()
          }
        });

        expect(resource).toBeNull();
      });

test('given a concrete matching server and unmatched methods should not match', async () => {
        const url = randomUrl();
        const [ resourceMethod, requestMethod ] = pickSetOfHttpMethods(2);
        const resource = await router.route({
          resources: [{
            id: chance.guid(),
            method: resourceMethod,
            path: randomPath(),
            responses: [],
            servers: [{
              url: url.toString(),
            }]
          }],
          input: {
            method: requestMethod,
            url
          }
        });