private void TestHttpClient(WebApiHelper webApiHelper, string testUri, int testCount, int failMs)
{
for (int i = 0; i < testCount; i++)
{
var i1 = i;
Task.Run(async() =>
{
var isOk = await webApiHelper.CheckTargetStatus(testUri, failMs);
Console.WriteLine("test " + i1 + " => " + (isOk ? "OK" : "!!!"));
});
}
}