public async Task Given_request_populates_labels_supplied_out_of_order_correctly()
{
var histogram = _factory.CreateHistogram("all_labels_histogram", "", new HistogramConfiguration
{
Buckets = new[] { 1d, 2d, 3d },
LabelNames = HttpRequestLabelNames.All.Reverse().ToArray()
});
var expectedStatusCode = 400;
var expectedMethod = "METHOD";
var expectedAction = "ACTION";
var expectedController = "CONTROLLER";
SetupHttpContext(_httpContext, expectedStatusCode, expectedMethod, expectedAction, expectedController);
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
await _sut.Invoke(_httpContext);
var labels = histogram.GetAllLabels().Single();
Assert.AreEqual(expectedStatusCode.ToString(), GetLabelValueOrDefault(labels, HttpRequestLabelNames.Code));
Assert.AreEqual(expectedMethod, GetLabelValueOrDefault(labels, HttpRequestLabelNames.Method));
Assert.AreEqual(expectedAction, GetLabelValueOrDefault(labels, HttpRequestLabelNames.Action));
Assert.AreEqual(expectedController, GetLabelValueOrDefault(labels, HttpRequestLabelNames.Controller));
}
private Task SetRequestDurationAndInvoke(Histogram histogram, TimeSpan duration)
{
_requestDelegate = context =>
{
Thread.Sleep(duration);
return(Task.CompletedTask);
};
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
return(_sut.Invoke(_httpContext));
}
public void Setup()
{
_registry = Metrics.NewCustomRegistry();
_factory = Metrics.WithCustomRegistry(_registry);
_inFlightMiddleware =
new HttpInFlightMiddleware(next => Task.CompletedTask, _factory.CreateGauge("in_flight", "help"));
_countMiddleware =
new HttpRequestCountMiddleware(next => Task.CompletedTask, _factory.CreateCounter("count", "help"));
_durationMiddleware =
new HttpRequestDurationMiddleware(next => Task.CompletedTask, _factory.CreateHistogram("duration", "help"));
}
public void Init()
{
_registry = Metrics.NewCustomRegistry();
_factory = Metrics.WithCustomRegistry(_registry);
_histogram = _factory.CreateHistogram("default_histogram", "", new HistogramConfiguration
{
Buckets = new[] { 0.1d, 1d, 10d }
});
_requestDelegate = context => Task.CompletedTask;
_httpContext = new DefaultHttpContext();
_sut = new HttpRequestDurationMiddleware(_requestDelegate, _histogram);
}
public void Setup()
{
_registry = Metrics.NewCustomRegistry();
_factory = Metrics.WithCustomRegistry(_registry);
_inProgressMiddleware = new HttpInProgressMiddleware(next => Task.CompletedTask, new HttpInProgressOptions
{
Gauge = _factory.CreateGauge("in_progress", "help")
});
_countMiddleware = new HttpRequestCountMiddleware(next => Task.CompletedTask, new HttpRequestCountOptions
{
Counter = _factory.CreateCounter("count", "help")
});
_durationMiddleware = new HttpRequestDurationMiddleware(next => Task.CompletedTask, new HttpRequestDurationOptions
{
Histogram = _factory.CreateHistogram("duration", "help")
});
}
public async Task Given_multiple_requests_populates_action_label_correctly()
{
var histogram = _factory.CreateHistogram("histogram", "", new HistogramConfiguration
{
Buckets = new[] { 0.1d, 1d, 10d },
LabelNames = new[] { HttpRequestLabelNames.Action }
});
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
var expectedAction1 = await SetActionAndInvoke("Action1");
var expectedAction2 = await SetActionAndInvoke("Action2");
var labels = histogram.GetAllLabels();
var actions = GetLabelValues(labels, HttpRequestLabelNames.Action);
Assert.AreEqual(2, actions.Length);
CollectionAssert.AreEquivalent(new[] { expectedAction1, expectedAction2 }, actions);
}
public async Task Given_multiple_requests_populates_controller_label_correctly()
{
var histogram = _factory.CreateHistogram("histogram", "", new HistogramConfiguration
{
Buckets = new[] { 0.1d, 1d, 10d },
LabelNames = new[] { HttpRequestLabelNames.Controller }
});
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
var expectedController1 = await SetControllerAndInvoke("ValuesController");
var expectedController2 = await SetControllerAndInvoke("AuthController");
var labels = histogram.GetAllLabels();
var controllers = GetLabelValues(labels, HttpRequestLabelNames.Controller);
Assert.AreEqual(2, controllers.Length);
CollectionAssert.AreEquivalent(new[] { expectedController1, expectedController2 }, controllers);
}
public async Task Given_multiple_requests_populates_method_label_correctly()
{
var histogram = _factory.CreateHistogram("histogram", "", new HistogramConfiguration
{
Buckets = new[] { 0.1d, 1d, 10d },
LabelNames = new[] { HttpRequestLabelNames.Method }
});
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
var expectedMethod1 = await SetMethodAndInvoke("POST");
var expectedMethod2 = await SetMethodAndInvoke("GET");
var labels = histogram.GetAllLabels();
var methods = GetLabelValues(labels, HttpRequestLabelNames.Method);
Assert.AreEqual(2, methods.Length);
CollectionAssert.AreEquivalent(new[] { expectedMethod1, expectedMethod2 }, methods);
}
public async Task Given_multiple_requests_populates_code_label_correctly()
{
var histogram = _factory.CreateHistogram("histogram", "", new HistogramConfiguration
{
Buckets = new[] { 0.1d, 1d, 10d },
LabelNames = new[] { HttpRequestLabelNames.Code }
});
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
var expectedStatusCode1 = await SetStatusCodeAndInvoke(400);
var expectedStatusCode2 = await SetStatusCodeAndInvoke(401);
var labels = histogram.GetAllLabels();
var codes = GetLabelValues(labels, HttpRequestLabelNames.Code);
Assert.AreEqual(2, codes.Length);
CollectionAssert.AreEquivalent(new[] { expectedStatusCode1.ToString(), expectedStatusCode2.ToString() }, codes);
}
public async Task Given_request_populates_subset_of_labels_correctly()
{
var histogram = _factory.CreateHistogram("all_labels_histogram", "", new HistogramConfiguration
{
Buckets = new[] { 1d, 2d, 3d },
LabelNames = new[] { HttpRequestLabelNames.Action, HttpRequestLabelNames.Controller }
});
var expectedAction = "ACTION";
var expectedController = "CONTROLLER";
SetupHttpContext(_httpContext, 200, "method", expectedAction, expectedController);
_sut = new HttpRequestDurationMiddleware(_requestDelegate, histogram);
await _sut.Invoke(_httpContext);
var labels = histogram.GetAllLabels().Single();
Assert.IsNull(GetLabelValueOrDefault(labels, HttpRequestLabelNames.Code));
Assert.IsNull(GetLabelValueOrDefault(labels, HttpRequestLabelNames.Method));
Assert.AreEqual(expectedAction, GetLabelValueOrDefault(labels, HttpRequestLabelNames.Action));
Assert.AreEqual(expectedController, GetLabelValueOrDefault(labels, HttpRequestLabelNames.Controller));
}
