forked from open-telemetry/opentelemetry-js
/
Tracer.test.ts
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/
Tracer.test.ts
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/*
* Copyright The OpenTelemetry Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import {
INVALID_TRACEID,
ROOT_CONTEXT,
Sampler,
SamplingDecision,
TraceFlags,
SpanContext,
trace,
} from '@opentelemetry/api';
import {
AlwaysOffSampler,
AlwaysOnSampler,
InstrumentationLibrary,
suppressTracing,
} from '@opentelemetry/core';
import * as assert from 'assert';
import { BasicTracerProvider, Span, Tracer } from '../../src';
describe('Tracer', () => {
const tracerProvider = new BasicTracerProvider();
const envSource = (typeof window !== 'undefined'
? window
: process.env) as any;
class TestSampler implements Sampler {
shouldSample() {
return {
decision: SamplingDecision.RECORD_AND_SAMPLED,
attributes: {
testAttribute: 'foobar',
},
};
}
}
afterEach(() => {
delete envSource.OTEL_TRACES_SAMPLER;
delete envSource.OTEL_TRACES_SAMPLER_ARG;
});
it('should create a Tracer instance', () => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
assert.ok(tracer instanceof Tracer);
});
it('should use an ParentBasedSampler by default', () => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
assert.strictEqual(
tracer['_sampler'].toString(),
'ParentBased{root=AlwaysOnSampler, remoteParentSampled=AlwaysOnSampler, remoteParentNotSampled=AlwaysOffSampler, localParentSampled=AlwaysOnSampler, localParentNotSampled=AlwaysOffSampler}'
);
});
it('should respect NO_RECORD sampling result', () => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{ sampler: new AlwaysOffSampler() },
tracerProvider
);
const span = tracer.startSpan('span1');
assert.ok(!span.isRecording());
span.end();
});
it('should respect RECORD_AND_SAMPLE sampling result', () => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{ sampler: new AlwaysOnSampler() },
tracerProvider
);
const span = tracer.startSpan('span2');
assert.ok(span.isRecording());
span.end();
});
it('should start a span with attributes in sampling result', () => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{ sampler: new TestSampler() },
tracerProvider
);
const span = tracer.startSpan('span3');
assert.strictEqual((span as Span).attributes.testAttribute, 'foobar');
span.end();
});
it('should have an instrumentationLibrary', () => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
const lib: InstrumentationLibrary = tracer.instrumentationLibrary;
assert.strictEqual(lib.name, 'default');
assert.strictEqual(lib.version, '0.0.1');
});
describe('when suppressTracing true', () => {
const context = suppressTracing(ROOT_CONTEXT);
it('should return cached no-op span ', done => {
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{ sampler: new TestSampler() },
tracerProvider
);
const span = tracer.startSpan('span3', undefined, context);
assert.ok(!span.isRecording());
span.end();
done();
});
});
it('should use traceId and spanId from parent', () => {
const parent: SpanContext = {
traceId: '00112233445566778899001122334455',
spanId: '0011223344556677',
traceFlags: TraceFlags.SAMPLED,
};
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
const span = tracer.startSpan(
'aSpan',
undefined,
trace.setSpanContext(ROOT_CONTEXT, parent)
);
assert.strictEqual((span as Span).parentSpanId, parent.spanId);
assert.strictEqual(span.spanContext().traceId, parent.traceId);
});
it('should not use spanId from invalid parent', () => {
const parent: SpanContext = {
traceId: INVALID_TRACEID,
spanId: '0011223344556677',
traceFlags: TraceFlags.SAMPLED,
};
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
const span = tracer.startSpan(
'aSpan',
undefined,
trace.setSpanContext(ROOT_CONTEXT, parent)
);
assert.strictEqual((span as Span).parentSpanId, undefined);
});
it('should sample a trace when OTEL_TRACES_SAMPLER_ARG is unset', () => {
envSource.OTEL_TRACES_SAMPLER = 'traceidratio';
envSource.OTEL_TRACES_SAMPLER_ARG = '';
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
const span = tracer.startSpan('my-span');
const context = span.spanContext();
assert.strictEqual(context.traceFlags, TraceFlags.SAMPLED);
span.end();
});
it('should not sample a trace when OTEL_TRACES_SAMPLER_ARG is out of range', () => {
envSource.OTEL_TRACES_SAMPLER = 'traceidratio';
envSource.OTEL_TRACES_SAMPLER_ARG = '2';
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
const span = tracer.startSpan('my-span');
const context = span.spanContext();
assert.strictEqual(context.traceFlags, TraceFlags.SAMPLED);
span.end();
});
it('should not sample a trace when OTEL_TRACES_SAMPLER_ARG is 0', () => {
envSource.OTEL_TRACES_SAMPLER = 'traceidratio';
envSource.OTEL_TRACES_SAMPLER_ARG = '0';
const tracer = new Tracer(
{ name: 'default', version: '0.0.1' },
{},
tracerProvider
);
const span = tracer.startSpan('my-span');
const context = span.spanContext();
assert.strictEqual(context.traceFlags, TraceFlags.NONE);
span.end();
});
});