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https://github.com/open-telemetry/opentelemetry-go.git
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640a0cd8bc
* bridge/opentracing: add NewDynamicWrappedTracerProvider for named tracers * bridge/opentelmeetry: cache created Tracers, add tests * bridge/opentracing: rename constructor to NewTracerProvider * add license header * Update docstring Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> * fix deprecated docstring * rewrite new lookup TracerProvider as separate type * update docstring * add changelog entries * Update bridge/opentracing/provider.go Co-authored-by: Damien Mathieu <42@dmathieu.com> Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> Co-authored-by: Damien Mathieu <42@dmathieu.com>
86 lines
2.6 KiB
Go
86 lines
2.6 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package opentracing
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import (
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"testing"
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"go.opentelemetry.io/otel/bridge/opentracing/internal"
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"go.opentelemetry.io/otel/trace"
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)
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type namedMockTracer struct {
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name string
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*internal.MockTracer
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}
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type namedMockTracerProvider struct{}
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var _ trace.TracerProvider = (*namedMockTracerProvider)(nil)
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// Tracer returns the WrapperTracer associated with the WrapperTracerProvider.
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func (p *namedMockTracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.Tracer {
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return &namedMockTracer{
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name: name,
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MockTracer: internal.NewMockTracer(),
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}
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}
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func TestTracerProvider(t *testing.T) {
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// assertMockTracerName casts tracer into a named mock tracer provided by
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// namedMockTracerProvider, and asserts against its name
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assertMockTracerName := func(t *testing.T, tracer trace.Tracer, name string) {
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// Unwrap the tracer
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wrapped := tracer.(*WrapperTracer)
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tracer = wrapped.tracer
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// Cast into the underlying type and assert
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if mock, ok := tracer.(*namedMockTracer); ok {
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if name != mock.name {
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t.Errorf("expected name %q, got %q", name, mock.name)
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}
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} else if !ok {
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t.Errorf("expected *namedMockTracer, got %T", mock)
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}
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}
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var (
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foobar = "foobar"
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bazbar = "bazbar"
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provider = NewTracerProvider(nil, &namedMockTracerProvider{})
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)
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t.Run("Tracers should be created with foobar from provider", func(t *testing.T) {
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tracer := provider.Tracer(foobar)
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assertMockTracerName(t, tracer, foobar)
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})
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t.Run("Repeated requests to create a tracer should provide the existing tracer", func(t *testing.T) {
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tracer1 := provider.Tracer(foobar)
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assertMockTracerName(t, tracer1, foobar)
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tracer2 := provider.Tracer(foobar)
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assertMockTracerName(t, tracer2, foobar)
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tracer3 := provider.Tracer(bazbar)
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assertMockTracerName(t, tracer3, bazbar)
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if tracer1 != tracer2 {
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t.Errorf("expected the same tracer, got different tracers")
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}
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if tracer1 == tracer3 || tracer2 == tracer3 {
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t.Errorf("expected different tracers, got the same tracer")
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}
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})
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}
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