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span_test.go
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span_test.go
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package basictracer
import (
"reflect"
"testing"
opentracing "github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/log"
"github.com/stretchr/testify/assert"
)
func TestSpan_Baggage(t *testing.T) {
recorder := NewInMemoryRecorder()
tracer := NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return true }, // always sample
})
span := tracer.StartSpan("x")
span.SetBaggageItem("x", "y")
assert.Equal(t, "y", span.BaggageItem("x"))
span.Finish()
spans := recorder.GetSpans()
assert.Equal(t, 1, len(spans))
assert.Equal(t, map[string]string{"x": "y"}, spans[0].Context.Baggage)
recorder.Reset()
span = tracer.StartSpan("x")
span.SetBaggageItem("x", "y")
baggage := make(map[string]string)
span.Context().ForeachBaggageItem(func(k, v string) bool {
baggage[k] = v
return true
})
assert.Equal(t, map[string]string{"x": "y"}, baggage)
span.SetBaggageItem("a", "b")
baggage = make(map[string]string)
span.Context().ForeachBaggageItem(func(k, v string) bool {
baggage[k] = v
return false // exit early
})
assert.Equal(t, 1, len(baggage))
span.Finish()
spans = recorder.GetSpans()
assert.Equal(t, 1, len(spans))
assert.Equal(t, 2, len(spans[0].Context.Baggage))
}
func TestSpan_Sampling(t *testing.T) {
recorder := NewInMemoryRecorder()
tracer := NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return true },
})
span := tracer.StartSpan("x")
span.Finish()
assert.Equal(t, 1, len(recorder.GetSampledSpans()), "by default span should be sampled")
recorder.Reset()
span = tracer.StartSpan("x")
ext.SamplingPriority.Set(span, 0)
span.Finish()
assert.Equal(t, 0, len(recorder.GetSampledSpans()), "SamplingPriority=0 should turn off sampling")
tracer = NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return false },
})
recorder.Reset()
span = tracer.StartSpan("x")
span.Finish()
assert.Equal(t, 0, len(recorder.GetSampledSpans()), "by default span should not be sampled")
recorder.Reset()
span = tracer.StartSpan("x")
ext.SamplingPriority.Set(span, 1)
span.Finish()
assert.Equal(t, 1, len(recorder.GetSampledSpans()), "SamplingPriority=1 should turn on sampling")
}
func TestSpan_SingleLoggedTaggedSpan(t *testing.T) {
recorder := NewInMemoryRecorder()
tracer := NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return true }, // always sample
})
span := tracer.StartSpan("x")
span.LogEventWithPayload("event", "payload")
span.LogFields(log.String("key_str", "value"), log.Uint32("32bit", 4294967295))
span.SetTag("tag", "value")
span.Finish()
spans := recorder.GetSpans()
assert.Equal(t, 1, len(spans))
assert.Equal(t, "x", spans[0].Operation)
assert.Equal(t, 2, len(spans[0].Logs))
assert.Equal(t, opentracing.Tags{"tag": "value"}, spans[0].Tags)
lfv := log.NewLogFieldValidator(t, spans[0].Logs[0].Fields)
lfv.
ExpectNextFieldEquals("event", reflect.String, "event").
ExpectNextFieldEquals("payload", reflect.Interface, "payload")
lfv = log.NewLogFieldValidator(t, spans[0].Logs[1].Fields)
lfv.
ExpectNextFieldEquals("key_str", reflect.String, "value").
ExpectNextFieldEquals("32bit", reflect.Uint32, "4294967295")
}
func TestSpan_TrimUnsampledSpans(t *testing.T) {
recorder := NewInMemoryRecorder()
// Tracer that trims only unsampled but always samples
tracer := NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return true }, // always sample
TrimUnsampledSpans: true,
})
span := tracer.StartSpan("x")
span.LogFields(log.String("key_str", "value"), log.Uint32("32bit", 4294967295))
span.SetTag("tag", "value")
span.Finish()
spans := recorder.GetSpans()
assert.Equal(t, 1, len(spans))
assert.Equal(t, 1, len(spans[0].Logs))
assert.Equal(t, opentracing.Tags{"tag": "value"}, spans[0].Tags)
lfv := log.NewLogFieldValidator(t, spans[0].Logs[0].Fields)
lfv.
ExpectNextFieldEquals("key_str", reflect.String, "value").
ExpectNextFieldEquals("32bit", reflect.Uint32, "4294967295")
recorder.Reset()
// Tracer that trims only unsampled and never samples
tracer = NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return false }, // never sample
TrimUnsampledSpans: true,
})
span = tracer.StartSpan("x")
span.LogFields(log.String("key_str", "value"), log.Uint32("32bit", 4294967295))
span.SetTag("tag", "value")
span.Finish()
spans = recorder.GetSpans()
assert.Equal(t, 1, len(spans))
assert.Equal(t, 0, len(spans[0].Logs))
assert.Equal(t, 0, len(spans[0].Tags))
}
func TestSpan_DropAllLogs(t *testing.T) {
recorder := NewInMemoryRecorder()
// Tracer that drops logs
tracer := NewWithOptions(Options{
Recorder: recorder,
ShouldSample: func(traceID uint64) bool { return true }, // always sample
DropAllLogs: true,
})
span := tracer.StartSpan("x")
span.LogFields(log.String("key_str", "value"), log.Uint32("32bit", 4294967295))
span.SetTag("tag", "value")
span.Finish()
spans := recorder.GetSpans()
assert.Equal(t, 1, len(spans))
assert.Equal(t, "x", spans[0].Operation)
assert.Equal(t, opentracing.Tags{"tag": "value"}, spans[0].Tags)
// Only logs are dropped
assert.Equal(t, 0, len(spans[0].Logs))
}