github.com/sirupsen/logrus v1.9.3: TraceLevel

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 github.com/sirupsen/logrus.TraceLevel in pkg:golang/github.com/sirupsen/logrus@v1.9.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/sirupsen/logrus@v1.9.3
Demonstrate these symbols/APIs:
  - github.com/sirupsen/logrus.TraceLevel

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:a9e43f014e6825a71a6efc0f264d2267719046ba25efc85dc6afded1ffc2cd83","contract":["logrus.TraceLevel is a Level constant with value 6 representing trace level logging","logrus.TraceLevel String method returns string representation \"trace\"","logrus.ParseLevel parses lowercase and uppercase trace strings to logrus.TraceLevel","logrus.TraceLevel MarshalText marshals to byte slice \"trace\" and UnmarshalText unmarshals \"trace\" into Level","Logger configured with logrus.TraceLevel enables TraceLevel and all other standard logging levels","Logger configured with logrus.TraceLevel outputs log messages at TraceLevel and filters them when level is higher than TraceLevel"],"goal":"verify github.com/sirupsen/logrus.TraceLevel in pkg:golang/github.com/sirupsen/logrus@v1.9.3","kind":"HOW","packages":["pkg:golang/github.com/sirupsen/logrus@v1.9.3"],"schemaVersion":1,"symbols":["github.com/sirupsen/logrus.TraceLevel"]},"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/github.com/sirupsen/logrus@v1.9.3"],"schemaVersion":1,"subject":"pkg:golang/github.com/sirupsen/logrus@v1.9.3","symbols":["github.com/sirupsen/logrus.TraceLevel"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require github.com/sirupsen/logrus v1.9.3

require golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect

github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

package main

import (
	"os"

	"github.com/sirupsen/logrus"
)

func main() {
	logger := logrus.New()
	logger.SetOutput(os.Stdout)
	logger.SetLevel(logrus.TraceLevel)

	logger.Infof("Current log level: %s", logger.GetLevel())
	logger.Trace("This is a trace message enabled by logrus.TraceLevel")
}

{
  "schemaVersion": 1,
  "goal": "verify github.com/sirupsen/logrus.TraceLevel in pkg:golang/github.com/sirupsen/logrus@v1.9.3",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/sirupsen/logrus@v1.9.3"
  ],
  "symbols": [
    "github.com/sirupsen/logrus.TraceLevel"
  ]
}

package main

import (
	"bytes"
	"fmt"
	"os"
	"strings"

	"github.com/sirupsen/logrus"
)

func main() {
	if err := runTests(); err != nil {
		fmt.Fprintf(os.Stderr, "Contract test failed: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("All contract tests passed successfully.")
}

func runTests() error {
	// 1. logrus.TraceLevel is a Level constant with value 6 representing trace level logging
	if logrus.TraceLevel != 6 {
		return fmt.Errorf("expected logrus.TraceLevel to have value 6, got %d", logrus.TraceLevel)
	}

	// 2. logrus.TraceLevel String method returns string representation "trace"
	if str := logrus.TraceLevel.String(); str != "trace" {
		return fmt.Errorf("expected logrus.TraceLevel.String() to be %q, got %q", "trace", str)
	}

	// 3. logrus.ParseLevel parses lowercase and uppercase trace strings to logrus.TraceLevel
	for _, s := range []string{"trace", "TRACE", "Trace"} {
		lvl, err := logrus.ParseLevel(s)
		if err != nil {
			return fmt.Errorf("failed to parse level %q: %w", s, err)
		}
		if lvl != logrus.TraceLevel {
			return fmt.Errorf("expected %q to parse to TraceLevel (%d), got %d", s, logrus.TraceLevel, lvl)
		}
	}

	// 4. logrus.TraceLevel MarshalText marshals to byte slice "trace" and UnmarshalText unmarshals "trace" into Level
	data, err := logrus.TraceLevel.MarshalText()
	if err != nil {
		return fmt.Errorf("failed to marshal TraceLevel: %w", err)
	}
	if string(data) != "trace" {
		return fmt.Errorf("expected MarshalText to return %q, got %q", "trace", string(data))
	}
	var unmarshaled logrus.Level
	if err := unmarshaled.UnmarshalText([]byte("trace")); err != nil {
		return fmt.Errorf("failed to unmarshal 'trace': %w", err)
	}
	if unmarshaled != logrus.TraceLevel {
		return fmt.Errorf("expected UnmarshalText to yield TraceLevel, got %v", unmarshaled)
	}

	// 5. Logger configured with logrus.TraceLevel enables TraceLevel and all other standard logging levels
	logger := logrus.New()
	logger.SetLevel(logrus.TraceLevel)
	if logger.GetLevel() != logrus.TraceLevel {
		return fmt.Errorf("expected logger.GetLevel() to be TraceLevel, got %v", logger.GetLevel())
	}
	if !logger.IsLevelEnabled(logrus.TraceLevel) {
		return fmt.Errorf("expected IsLevelEnabled(TraceLevel) to be true")
	}
	if !logger.IsLevelEnabled(logrus.DebugLevel) {
		return fmt.Errorf("expected IsLevelEnabled(DebugLevel) to be true")
	}
	if !logger.IsLevelEnabled(logrus.InfoLevel) {
		return fmt.Errorf("expected IsLevelEnabled(InfoLevel) to be true")
	}
	if !logger.IsLevelEnabled(logrus.WarnLevel) {
		return fmt.Errorf("expected IsLevelEnabled(WarnLevel) to be true")
	}
	if !logger.IsLevelEnabled(logrus.ErrorLevel) {
		return fmt.Errorf("expected IsLevelEnabled(ErrorLevel) to be true")
	}

	// 6. Logger configured with logrus.TraceLevel outputs log messages at TraceLevel and filters them when level is higher than TraceLevel
	var buf bytes.Buffer
	bufLogger := logrus.New()
	bufLogger.SetOutput(&buf)
	bufLogger.SetFormatter(&logrus.TextFormatter{
		DisableColors:    true,
		DisableTimestamp: true,
	})

	bufLogger.SetLevel(logrus.TraceLevel)
	bufLogger.Trace("test trace message")
	if !strings.Contains(buf.String(), "level=trace") || !strings.Contains(buf.String(), "msg=\"test trace message\"") {
		return fmt.Errorf("expected output to contain level=trace and message, got: %q", buf.String())
	}

	buf.Reset()
	bufLogger.SetLevel(logrus.DebugLevel)
	bufLogger.Trace("suppressed trace message")
	if buf.Len() != 0 {
		return fmt.Errorf("expected no output for Trace when level is DebugLevel, got: %q", buf.String())
	}

	return nil
}