public async Task OnRequest_AwaitsResponseDisposal_ThenRecordsDuration()
{
var registry = Metrics.NewCustomRegistry();
var options = new HttpClientResponseDurationOptions
{
Registry = registry
};
var handler = new HttpClientResponseDurationHandler(options, HttpClientIdentity.Default);
// Use a mock client handler so we can control when the task completes
var mockHttpClientHandler = new MockHttpClientHandler();
handler.InnerHandler = mockHttpClientHandler;
var client = new HttpClient(handler);
var requestTask = client.GetAsync(ConnectivityCheck.Url, HttpCompletionOption.ResponseHeadersRead);
// There should be no duration metric recorded unless the task is completed.
Assert.AreEqual(0, handler._metric.WithLabels("GET", ConnectivityCheck.Host, HttpClientIdentity.Default.Name, ConnectivityCheck.ExpectedResponseCode).Count);
mockHttpClientHandler.Complete();
// There should be no duration metric recorded unless the response is actually read or disposed.
Assert.AreEqual(0, handler._metric.WithLabels("GET", ConnectivityCheck.Host, HttpClientIdentity.Default.Name, ConnectivityCheck.ExpectedResponseCode).Count);
var response = await requestTask;
response.Dispose();
// Now that we have disposed it, it should show up.
Assert.AreEqual(1, handler._metric.WithLabels("GET", ConnectivityCheck.Host, HttpClientIdentity.Default.Name, ConnectivityCheck.ExpectedResponseCode).Count);
}
public async Task OnRequest_IncrementsHistogramCountAndSum()
{
var registry = Metrics.NewCustomRegistry();
var options = new HttpClientResponseDurationOptions
{
Registry = registry
};
var handler = new HttpClientResponseDurationHandler(options, HttpClientIdentity.Default);
// As we are not using the HttpClientProvider for constructing our pipeline, we need to do this manually.
handler.InnerHandler = new HttpClientHandler();
var client = new HttpClient(handler);
await client.GetAsync(ConnectivityCheck.Url);
Assert.AreEqual(1, handler._metric.WithLabels("GET", ConnectivityCheck.Host, HttpClientIdentity.Default.Name, ConnectivityCheck.ExpectedResponseCode).Count);
Assert.IsTrue(handler._metric.WithLabels("GET", ConnectivityCheck.Host, HttpClientIdentity.Default.Name, ConnectivityCheck.ExpectedResponseCode).Sum > 0);
}
