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SpanBuilderTests.cs
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SpanBuilderTests.cs
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using Moq;
using OpenTracing;
using System;
using Xunit;
namespace Datadog.Trace.Tests
{
public class SpanBuilderTests
{
private Mock<IDatadogTracer> _tracerMock;
private TraceContext _traceContext;
private Func<SpanBuilder> CreateSpanBuilder;
private const string _defaultServiceName = "DefaultServiceName";
public SpanBuilderTests()
{
_tracerMock = new Mock<IDatadogTracer>(MockBehavior.Strict);
_traceContext = new TraceContext(_tracerMock.Object);
_tracerMock.Setup(x => x.GetTraceContext()).Returns(_traceContext);
_tracerMock.Setup(x => x.DefaultServiceName).Returns(_defaultServiceName);
CreateSpanBuilder = () => new SpanBuilder(_tracerMock.Object, null);
}
[Fact]
public void Start_NoServiceName_DefaultServiceNameIsSet()
{
var span = (Span)CreateSpanBuilder().Start();
Assert.Equal(_defaultServiceName, span.ServiceName);
}
[Fact]
public void Start_NoParentProvided_RootSpan()
{
var span = CreateSpanBuilder().Start();
var spanContext = (SpanContext)span.Context;
Assert.Null(spanContext.ParentId);
Assert.NotEqual<ulong>(0, spanContext.SpanId);
Assert.NotEqual<ulong>(0, spanContext.TraceId);
}
[Fact]
public void Start_AsChildOfSpan_ChildReferencesParent()
{
var root = (Span)CreateSpanBuilder().Start();
var child = (Span)CreateSpanBuilder()
.AsChildOf(root)
.Start();
Assert.Null(root.Context.ParentId);
Assert.NotEqual<ulong>(0, root.Context.SpanId);
Assert.NotEqual<ulong>(0, root.Context.TraceId);
Assert.Equal(root.Context.SpanId, child.Context.ParentId);
Assert.Equal(root.Context.TraceId, child.Context.TraceId);
Assert.NotEqual<ulong>(0, child.Context.SpanId);
}
[Fact]
public void Start_AsChildOfSpanContext_ChildReferencesParent()
{
var root = (Span)CreateSpanBuilder().Start();
var child = (Span)CreateSpanBuilder()
.AsChildOf(root.Context)
.Start();
Assert.Null(root.Context.ParentId);
Assert.NotEqual<ulong>(0, root.Context.SpanId);
Assert.NotEqual<ulong>(0, root.Context.TraceId);
Assert.Equal(root.Context.SpanId, child.Context.ParentId);
Assert.Equal(root.Context.TraceId, child.Context.TraceId);
Assert.NotEqual<ulong>(0, child.Context.SpanId);
}
[Fact]
public void Start_ReferenceAsChildOf_ChildReferencesParent()
{
var root = (Span)CreateSpanBuilder().Start();
var child = (Span)CreateSpanBuilder()
.AddReference(References.ChildOf, root.Context)
.Start();
Assert.Null(root.Context.ParentId);
Assert.NotEqual<ulong>(0, root.Context.SpanId);
Assert.NotEqual<ulong>(0, root.Context.TraceId);
Assert.Equal(root.Context.SpanId, child.Context.ParentId);
Assert.Equal(root.Context.TraceId, child.Context.TraceId);
Assert.NotEqual<ulong>(0, child.Context.SpanId);
}
[Fact]
public void Start_WithTags_TagsAreProperlySet()
{
var span = (Span)CreateSpanBuilder()
.WithTag("StringKey", "What's tracing")
.WithTag("IntKey", 42)
.WithTag("DoubleKey", 1.618)
.WithTag("BoolKey", true)
.Start();
Assert.Equal("What's tracing", span.GetTag("StringKey"));
Assert.Equal("42", span.GetTag("IntKey"));
Assert.Equal("1.618", span.GetTag("DoubleKey"));
Assert.Equal("True", span.GetTag("BoolKey"));
}
[Fact]
public void Start_SettingService_ServiceIsSet()
{
var span = (Span)CreateSpanBuilder()
.WithTag("service.name", "MyService")
.Start();
Assert.Equal("MyService", span.ServiceName);
}
[Fact]
public void Start_SettingServiceInParent_ChildInheritServiceName()
{
var root = (Span)CreateSpanBuilder()
.WithTag("service.name", "MyService")
.Start();
var child = (Span)CreateSpanBuilder()
.Start();
Assert.Equal("MyService", root.ServiceName);
Assert.Equal("MyService", child.ServiceName);
}
[Fact]
public void Start_SettingServiceInChild_ServiceNameOverrideParent()
{
var root = (Span)CreateSpanBuilder()
.WithTag("service.name", "MyService")
.Start();
var child = (Span)CreateSpanBuilder()
.WithTag("service.name", "AnotherService")
.Start();
Assert.Equal("MyService", root.ServiceName);
Assert.Equal("AnotherService", child.ServiceName);
}
[Fact]
public void Start_SettingResource_ResourceIsSet()
{
var span = (Span)CreateSpanBuilder()
.WithTag("resource.name", "MyResource")
.Start();
Assert.Equal("MyResource", span.ResourceName);
}
[Fact]
public void Start_SettingType_TypeIsSet()
{
var span = (Span)CreateSpanBuilder()
.WithTag("span.type", "web")
.Start();
Assert.Equal("web", span.Type);
}
[Fact]
public void Start_SettingError_ErrorIsSet()
{
var span = (Span)CreateSpanBuilder()
.WithTag(OpenTracing.Tags.Error, true)
.Start();
Assert.Equal(true, span.Error);
}
[Fact]
public void Start_WithStartTimeStamp_TimeStampProperlySet()
{
var startTime = new DateTimeOffset(2017, 01, 01, 0, 0, 0, TimeSpan.Zero);
var span = (Span)CreateSpanBuilder()
.WithStartTimestamp(startTime)
.Start();
Assert.Equal(startTime, span.StartTime);
}
[Fact]
public void Start_SetOperationName_OperationNameProperlySet()
{
var spanBuilder = new SpanBuilder(_tracerMock.Object, "Op1");
var span = (Span)spanBuilder.Start();
Assert.Equal("Op1", span.OperationName);
}
}
}