public async Task When_SendingAsyncRespondsWithException_Expect_SetTagError()
{
// Arrange
ServiceCollection services = new ServiceCollection();
services.AddScoped <ITracer, MockTracer>();
IServiceProvider serviceProvider = services.BuildServiceProvider();
ITracer tracer = serviceProvider.GetRequiredService <ITracer>();
IHttpContextAccessor httpContextAccessor = new HttpContextAccessor
{
HttpContext = new DefaultHttpContext {
RequestServices = serviceProvider
},
};
Exception exception = new Exception();
OpenTracingSpanTaggingHttpMessageHandler handler = new OpenTracingSpanTaggingHttpMessageHandler(httpContextAccessor)
{
InnerHandler = new MockExceptionThrowingInnerHandler(exception),
};
Exception result;
// Act
using (tracer.BuildSpan("Unit Test").StartActive())
using (HttpClient client = new HttpClient(handler))
{
result = await Record.ExceptionAsync(() => client.GetAsync(new Uri("http://localhost")));
}
// Assert
MockTracer mockTracer = Assert.IsType <MockTracer>(tracer);
MockSpan mockSpan = Assert.Single(mockTracer.FinishedSpans());
Assert.True(mockSpan.Tags.ContainsKey("error"));
Assert.True(Assert.IsType <bool>(mockSpan.Tags["error"]));
Assert.NotNull(result);
Assert.Equal(exception, result);
}
public async Task When_SendingAsyncRespondsWithStatusCode_Expect_SetTag(int statusCode, bool expectedError)
{
// Arrange
ServiceCollection services = new ServiceCollection();
services.AddScoped <ITracer, MockTracer>();
IServiceProvider serviceProvider = services.BuildServiceProvider();
ITracer tracer = serviceProvider.GetRequiredService <ITracer>();
IHttpContextAccessor httpContextAccessor = new HttpContextAccessor
{
HttpContext = new DefaultHttpContext {
RequestServices = serviceProvider
},
};
OpenTracingSpanTaggingHttpMessageHandler handler = new OpenTracingSpanTaggingHttpMessageHandler(httpContextAccessor)
{
InnerHandler = new MockResponseReturningInnerHandler(statusCode),
};
// Act
using (tracer.BuildSpan("Unit Test").StartActive())
using (HttpClient client = new HttpClient(handler))
{
await client.GetAsync(new Uri("http://localhost"));
}
// Assert
MockTracer mockTracer = Assert.IsType <MockTracer>(tracer);
MockSpan mockSpan = Assert.Single(mockTracer.FinishedSpans());
if (mockSpan.Tags.ContainsKey("error"))
{
Assert.Equal(expectedError, mockSpan.Tags["error"]);
}
Assert.Equal(expectedError, mockSpan.Tags.ContainsKey("error"));
}
public async Task When_SendingAsyncRespondsWithStatusCodeWithNullActiveSpan_Expect_NoSpans()
{
// Arrange
ServiceCollection services = new ServiceCollection();
services.AddScoped <ITracer, MockTracer>();
IServiceProvider serviceProvider = services.BuildServiceProvider();
ITracer tracer = serviceProvider.GetRequiredService <ITracer>();
IHttpContextAccessor httpContextAccessor = new HttpContextAccessor
{
HttpContext = new DefaultHttpContext {
RequestServices = serviceProvider
},
};
OpenTracingSpanTaggingHttpMessageHandler handler = new OpenTracingSpanTaggingHttpMessageHandler(httpContextAccessor)
{
InnerHandler = new MockResponseReturningInnerHandler(500),
};
Exception result;
// Act
using (HttpClient client = new HttpClient(handler))
{
result = await Record.ExceptionAsync(() => client.GetAsync(new Uri("http://localhost")));
}
// Assert
MockTracer mockTracer = Assert.IsType <MockTracer>(tracer);
Assert.Empty(mockTracer.FinishedSpans());
Assert.Null(result);
}