public void GenerateDifferentCorrelationIdsForEachRequest()
{
// Act
var options = new CorrelationOptions();
var previous = new HashSet <string>(StringComparer.OrdinalIgnoreCase); // Guids are case-insensitive
var context = new DefaultHttpContext();
// Assert
while (previous.Count < 10000)
{
string generated = options.CorrelationIdGenerator(context);
// .Add returns false if the element is already present.
previous.Add(generated).Should().BeTrue("each generated value should be unique");
}
}
public void HaveCorrectDefaults()
{
// Act
var options = new CorrelationOptions();
// Assert
options.Header.Should().Be(Constants.XCorrelationID, "the default correlation id header should be used.");
options.IncludeInResponse.Should().Be(true, "the correlation id should be included in the response by default.");
options.UseTraceIdentifier.Should().Be(false, "the default trace identifier is machine and connection specific - it is not a very good cross machine correlation id by default.");
options.UpdateTraceIdentifier.Should().Be(true, "the internal logging of ASP.NET uses the trace identifier thus it is easier if it is updated to match any incoming correlation id.");
options.CorrelationIdGenerator.Should().NotBeNull("the options should have a non-null correlation id generator by default");
string generated = options.CorrelationIdGenerator(new DefaultHttpContext());
generated.Should().NotBeNullOrWhiteSpace();
Guid.TryParse(generated, out _).Should().Be(true, "the default generator should create guid strings");
}