go.opentelemetry.io/otel/trace v1.42.0: TracerProvider

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify go.opentelemetry.io/otel/trace.TracerProvider in pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0
Demonstrate these symbols/APIs:
  - go.opentelemetry.io/otel/trace.TracerProvider

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:55b50efd976b44f203624b48a4867080b750f55778b190a070eaf021a9274622","contract":["trace.NewNoopTracerProvider returns a TracerProvider instance that satisfies the trace.TracerProvider interface.","noop.NewTracerProvider returns an instance that satisfies the trace.TracerProvider interface.","TracerProvider.Tracer creates a non-nil Tracer with the specified instrumentation name.","TracerProvider.Tracer accepts TracerOptions including WithInstrumentationVersion and WithSchemaURL.","Tracer obtained from TracerProvider starts spans returning a valid context and Span instance."],"goal":"verify go.opentelemetry.io/otel/trace.TracerProvider in pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0"],"schemaVersion":1,"symbols":["go.opentelemetry.io/otel/trace.TracerProvider"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0","symbols":["go.opentelemetry.io/otel/trace.TracerProvider"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require go.opentelemetry.io/otel/trace v1.42.0

require (
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	go.opentelemetry.io/otel v1.42.0 // indirect
)

github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
go.opentelemetry.io/otel v1.42.0 h1:lSQGzTgVR3+sgJDAU/7/ZMjN9Z+vUip7leaqBKy4sho=
go.opentelemetry.io/otel v1.42.0/go.mod h1:lJNsdRMxCUIWuMlVJWzecSMuNjE7dOYyWlqOXWkdqCc=
go.opentelemetry.io/otel/trace v1.42.0 h1:OUCgIPt+mzOnaUTpOQcBiM/PLQ/Op7oq6g4LenLmOYY=
go.opentelemetry.io/otel/trace v1.42.0/go.mod h1:f3K9S+IFqnumBkKhRJMeaZeNk9epyhnCmQh/EysQCdc=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

package main

import (
	"context"
	"fmt"

	"go.opentelemetry.io/otel/trace"
	"go.opentelemetry.io/otel/trace/noop"
)

func main() {
	var tp trace.TracerProvider = noop.NewTracerProvider()

	tracer := tp.Tracer(
		"example-tracer",
		trace.WithInstrumentationVersion("1.0.0"),
		trace.WithSchemaURL("https://example.com/schema"),
	)

	ctx, span := tracer.Start(context.Background(), "example-span")
	defer span.End()

	fmt.Printf("TracerProvider configured: %v, span active: %v\n", tracer != nil, ctx != nil)
}

{
  "schemaVersion": 1,
  "goal": "verify go.opentelemetry.io/otel/trace.TracerProvider in pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/trace@v1.42.0"
  ],
  "symbols": [
    "go.opentelemetry.io/otel/trace.TracerProvider"
  ]
}

package main

import (
	"context"
	"fmt"
	"os"

	"go.opentelemetry.io/otel/trace"
	"go.opentelemetry.io/otel/trace/noop"
)

func main() {
	// Assertion 1: trace.NewNoopTracerProvider returns a TracerProvider instance that satisfies the trace.TracerProvider interface.
	var tp1 trace.TracerProvider = trace.NewNoopTracerProvider()
	if tp1 == nil {
		fmt.Fprintf(os.Stderr, "FAIL: expected trace.NewNoopTracerProvider to return non-nil TracerProvider\n")
		os.Exit(1)
	}

	// Assertion 2: noop.NewTracerProvider returns an instance that satisfies the trace.TracerProvider interface.
	var tp2 trace.TracerProvider = noop.NewTracerProvider()
	if tp2 == nil {
		fmt.Fprintf(os.Stderr, "FAIL: expected noop.NewTracerProvider to return non-nil TracerProvider\n")
		os.Exit(1)
	}

	// Assertion 3: TracerProvider.Tracer creates a non-nil Tracer with the specified instrumentation name.
	tracer1 := tp2.Tracer("test-tracer")
	if tracer1 == nil {
		fmt.Fprintf(os.Stderr, "FAIL: expected non-nil Tracer from TracerProvider.Tracer\n")
		os.Exit(1)
	}

	// Assertion 4: TracerProvider.Tracer accepts TracerOptions including WithInstrumentationVersion and WithSchemaURL.
	tracer2 := tp2.Tracer(
		"test-tracer-with-options",
		trace.WithInstrumentationVersion("1.2.3"),
		trace.WithSchemaURL("https://example.com/schema"),
	)
	if tracer2 == nil {
		fmt.Fprintf(os.Stderr, "FAIL: expected non-nil Tracer with options\n")
		os.Exit(1)
	}

	// Assertion 5: Tracer obtained from TracerProvider starts spans returning a valid context and Span instance.
	ctx := context.Background()
	spanCtx, span := tracer2.Start(ctx, "test-span")
	if spanCtx == nil {
		fmt.Fprintf(os.Stderr, "FAIL: expected non-nil context from tracer.Start\n")
		os.Exit(1)
	}
	if span == nil {
		fmt.Fprintf(os.Stderr, "FAIL: expected non-nil Span from tracer.Start\n")
		os.Exit(1)
	}
	span.End()

	fmt.Println("PASS: all go.opentelemetry.io/otel/trace.TracerProvider contract assertions passed.")
}