public async Task PropertyExistsReturnFailWhenServiceIsDown()
        {
            string propertyId = It.IsAny <String>();

            mockBlockService.Setup(m => m.InvokeHead(HyperledgerConsts.PropertyUrl, propertyId))
            .ThrowsAsync(new HttpRequestException());

            bool isPropertyExist = await clientWithMock.PropertyExists(propertyId);

            Assert.IsFalse(isPropertyExist);
        }