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

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.PanicLevel 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.PanicLevel

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:sha256:527fec05f401f4f3ee65bc1ca0b9f43aa8a8e30297f7abf802361f470fdd6b14","contract":["logrus.PanicLevel is a Level constant with value 0 representing panic level logging","logrus.PanicLevel String method returns string representation \"panic\"","logrus.ParseLevel parses case-insensitive panic strings to logrus.PanicLevel","logrus.PanicLevel MarshalText marshals to byte slice \"panic\" and UnmarshalText unmarshals \"panic\" into Level","Logger configured with logrus.PanicLevel enables only PanicLevel among standard logging levels","Panic logging outputs log message at PanicLevel, fires registered PanicLevel hooks, and triggers a panic"],"goal":"verify github.com/sirupsen/logrus.PanicLevel 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.PanicLevel"]},"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.PanicLevel"],"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 (
	"fmt"
	"os"

	"github.com/sirupsen/logrus"
)

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

	fmt.Printf("Logger initialized with level: %s (%d)\n", logger.GetLevel(), logger.GetLevel())
}

{
  "schemaVersion": 1,
  "goal": "verify github.com/sirupsen/logrus.PanicLevel 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.PanicLevel"
  ]
}

package main

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

	"github.com/sirupsen/logrus"
)

type panicHook struct {
	fired   bool
	level   logrus.Level
	message string
}

func (h *panicHook) Levels() []logrus.Level {
	return []logrus.Level{logrus.PanicLevel}
}

func (h *panicHook) Fire(entry *logrus.Entry) error {
	h.fired = true
	h.level = entry.Level
	h.message = entry.Message
	return nil
}

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.PanicLevel is a Level constant with value 0 representing panic level logging
	if logrus.PanicLevel != 0 {
		return fmt.Errorf("expected logrus.PanicLevel to have value 0, got %d", logrus.PanicLevel)
	}

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

	// 3. logrus.ParseLevel parses case-insensitive panic strings to logrus.PanicLevel
	for _, s := range []string{"panic", "PANIC", "Panic"} {
		lvl, err := logrus.ParseLevel(s)
		if err != nil {
			return fmt.Errorf("failed to parse level %q: %w", s, err)
		}
		if lvl != logrus.PanicLevel {
			return fmt.Errorf("expected %q to parse to PanicLevel (%d), got %d", s, logrus.PanicLevel, lvl)
		}
	}

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

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

	// 6. Panic logging outputs log message at PanicLevel, fires registered PanicLevel hooks, and triggers a panic
	var buf bytes.Buffer
	bufLogger := logrus.New()
	bufLogger.SetOutput(&buf)
	bufLogger.SetFormatter(&logrus.TextFormatter{
		DisableColors:    true,
		DisableTimestamp: true,
	})
	bufLogger.SetLevel(logrus.PanicLevel)

	hook := &panicHook{}
	bufLogger.AddHook(hook)

	testMsg := "critical state requiring panic"
	var panicked bool
	var panicVal any
	func() {
		defer func() {
			if r := recover(); r != nil {
				panicked = true
				panicVal = r
			}
		}()
		bufLogger.Panic(testMsg)
	}()

	if !panicked {
		return fmt.Errorf("expected logger.Panic to trigger panic")
	}
	if panicVal == nil {
		return fmt.Errorf("expected non-nil panic value")
	}
	if !hook.fired {
		return fmt.Errorf("expected PanicLevel hook to fire")
	}
	if hook.level != logrus.PanicLevel {
		return fmt.Errorf("hook captured level mismatch: expected PanicLevel, got %v", hook.level)
	}
	if hook.message != testMsg {
		return fmt.Errorf("hook captured message mismatch: expected %q, got %q", testMsg, hook.message)
	}
	output := buf.String()
	if !strings.Contains(output, testMsg) {
		return fmt.Errorf("expected log output to contain message %q, got: %s", testMsg, output)
	}
	if !strings.Contains(output, "level=panic") {
		return fmt.Errorf("expected log output to contain 'level=panic', got: %s", output)
	}

	return nil
}