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);
}