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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package consistent
import (
"context"
"strings"
"testing"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/attribute"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
)
func TestParentSamplerDescription(t *testing.T) {
opts := []sdktrace.ParentBasedSamplerOption{
sdktrace.WithRemoteParentNotSampled(sdktrace.AlwaysSample()),
}
root := ProbabilityBased(1)
compare := sdktrace.ParentBased(root, opts...)
parent := ParentProbabilityBased(root, opts...)
require.Equal(t,
strings.Replace(
compare.Description(),
"ParentBased",
"ParentProbabilityBased",
1,
),
parent.Description(),
)
}
func TestParentSamplerValidContext(t *testing.T) {
parent := ParentProbabilityBased(sdktrace.NeverSample())
type testCase struct {
in string
sampled bool
}
for _, valid := range []testCase{
// sampled tests
{"r:10", true},
{"r:10;a:b", true},
{"r:10;p:1", true},
{"r:10;p:10", true},
{"r:10;p:10;a:b", true},
{"r:10;p:63", true},
{"r:10;p:63;a:b", true},
{"p:0", true},
{"p:10;a:b", true},
{"p:63", true},
{"p:63;a:b", true},
// unsampled tests
{"r:10", false},
{"r:10;a:b", false},
} {
t.Run(testName(valid.in), func(t *testing.T) {
traceID, _ := trace.TraceIDFromHex("4bf92f3577b34da6a3ce929d0e0e4736")
spanID, _ := trace.SpanIDFromHex("00f067aa0ba902b7")
traceState, err := trace.TraceState{}.Insert(traceStateKey, valid.in)
require.NoError(t, err)
sccfg := trace.SpanContextConfig{
TraceID: traceID,
SpanID: spanID,
TraceState: traceState,
}
if valid.sampled {
sccfg.TraceFlags = trace.FlagsSampled
}
parentCtx := trace.ContextWithSpanContext(
context.Background(),
trace.NewSpanContext(sccfg),
)
result := parent.ShouldSample(
sdktrace.SamplingParameters{
ParentContext: parentCtx,
TraceID: traceID,
Name: "test",
Kind: trace.SpanKindServer,
},
)
if valid.sampled {
require.Equal(t, sdktrace.RecordAndSample, result.Decision)
} else {
require.Equal(t, sdktrace.Drop, result.Decision)
}
require.Equal(t, []attribute.KeyValue(nil), result.Attributes)
require.Equal(t, valid.in, result.Tracestate.Get(traceStateKey))
})
}
}
func TestParentSamplerInvalidContext(t *testing.T) {
parent := ParentProbabilityBased(sdktrace.NeverSample())
type testCase struct {
in string
sampled bool
expect string
}
for _, invalid := range []testCase{
// sampled
{"r:100", true, ""},
{"r:100;p:1", true, ""},
{"r:100;p:1;a:b", true, "a:b"},
{"r:10;p:100", true, "r:10"},
{"r:10;p:100;a:b", true, "r:10;a:b"},
// unsampled
{"r:63;p:1", false, ""},
{"r:10;p:1", false, "r:10"},
{"r:10;p:1;a:b", false, "r:10;a:b"},
} {
testInvalid := func(t *testing.T, isChildContext bool) {
traceID, _ := trace.TraceIDFromHex("4bf92f3577b34da6a3ce929d0e0e4736")
traceState, err := trace.TraceState{}.Insert(traceStateKey, invalid.in)
require.NoError(t, err)
sccfg := trace.SpanContextConfig{
TraceState: traceState,
}
if isChildContext {
spanID, _ := trace.SpanIDFromHex("00f067aa0ba902b7")
sccfg.TraceID = traceID
sccfg.SpanID = spanID
// Note: the other branch is testing a fabricated
// situation where the context has a tracestate and
// no TraceID.
}
if invalid.sampled {
sccfg.TraceFlags = trace.FlagsSampled
}
parentCtx := trace.ContextWithSpanContext(
context.Background(),
trace.NewSpanContext(sccfg),
)
result := parent.ShouldSample(
sdktrace.SamplingParameters{
ParentContext: parentCtx,
TraceID: sccfg.TraceID,
Name: "test",
Kind: trace.SpanKindServer,
},
)
if isChildContext && invalid.sampled {
require.Equal(t, sdktrace.RecordAndSample, result.Decision)
} else {
// if we're not a child context, ShouldSample
// falls through to the delegate, which is NeverSample.
require.Equal(t, sdktrace.Drop, result.Decision)
}
require.Equal(t, []attribute.KeyValue(nil), result.Attributes)
require.Equal(t, invalid.expect, result.Tracestate.Get(traceStateKey))
}
t.Run(testName(invalid.in)+"_with_parent", func(t *testing.T) {
testInvalid(t, true)
})
t.Run(testName(invalid.in)+"_no_parent", func(t *testing.T) {
testInvalid(t, false)
})
}
}
|
