github.com/rs/zerolog v1.15.0: DebugLevel

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/rs/zerolog.DebugLevel in pkg:golang/github.com/rs/zerolog@v1.15.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/rs/zerolog@v1.15.0
Demonstrate these symbols/APIs:
  - github.com/rs/zerolog.DebugLevel

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.

package sample

import (
	"bytes"
	"strings"
	"testing"

	"github.com/rs/zerolog"
)

func TestContractZerologDebugLevel(t *testing.T) {
	// 1. Verify zerolog.DebugLevel string value is "debug"
	if zerolog.DebugLevel.String() != "debug" {
		t.Fatalf("expected DebugLevel string to be 'debug', got %q", zerolog.DebugLevel.String())
	}

	// 2. Verify ParseLevel correctly parses "debug" to zerolog.DebugLevel
	parsed, err := ParseDebugLevel("debug")
	if err != nil {
		t.Fatalf("failed to parse level string 'debug': %v", err)
	}
	if !IsDebugLevel(parsed) {
		t.Fatalf("expected parsed level to be DebugLevel, got %v", parsed)
	}

	// 3. Verify logger configured with DebugLevel sets level and logs debug events
	var debugBuf bytes.Buffer
	debugLogger := NewDebugLogger(&debugBuf)
	if debugLogger.GetLevel() != zerolog.DebugLevel {
		t.Fatalf("expected logger level to be DebugLevel, got %v", debugLogger.GetLevel())
	}

	debugMsg := "debug level event recorded"
	LogDebug(debugLogger, debugMsg)

	output := debugBuf.String()
	if !strings.Contains(output, debugMsg) {
		t.Fatalf("expected log output to contain message %q, got %q", debugMsg, output)
	}
	if !strings.Contains(output, `"level":"debug"`) {
		t.Fatalf("expected log output to contain level 'debug', got %q", output)
	}

	// 4. Verify debug logs are suppressed when logger level is higher than DebugLevel
	var infoBuf bytes.Buffer
	infoLogger := zerolog.New(&infoBuf).Level(zerolog.InfoLevel)
	LogDebug(infoLogger, "should not be logged")
	if infoBuf.Len() != 0 {
		t.Fatalf("expected no output for debug event on InfoLevel logger, got %q", infoBuf.String())
	}
}

{"case":{"caseId":"case:sha256:93d6e08d41df6cec0510788188f3d767250c3f48903f113261025e59b3288b5e","contract":["zerolog.DebugLevel has string representation \"debug\"","zerolog.ParseLevel parses \"debug\" to zerolog.DebugLevel","zerolog.Logger configured with DebugLevel emits debug log messages","zerolog.Logger configured above DebugLevel suppresses debug log messages"],"goal":"verify github.com/rs/zerolog.DebugLevel in pkg:golang/github.com/rs/zerolog@v1.15.0","kind":"HOW","packages":["pkg:golang/github.com/rs/zerolog@v1.15.0"],"schemaVersion":1,"symbols":["github.com/rs/zerolog.DebugLevel"]},"contractCommand":["go","test","./..."],"environment":{"arch":"amd64","compiler":"go","compilerVersion":"1.26.6","distro":"ubuntu","ecosystem":"golang","language":"go","languageVersion":"1.26.6","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","packageManagerVersion":"1.26.6","runtime":"go","runtimeVersion":"1.26.6","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/rs/zerolog@v1.15.0"],"schemaVersion":1,"subject":"pkg:golang/github.com/rs/zerolog@v1.15.0","symbols":["github.com/rs/zerolog.DebugLevel"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require github.com/rs/zerolog v1.15.0

github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
github.com/rs/zerolog v1.15.0 h1:uPRuwkWF4J6fGsJ2R0Gn2jB1EQiav9k3S6CSdygQJXY=
github.com/rs/zerolog v1.15.0/go.mod h1:xYTKnLHcpfU2225ny5qZjxnj9NvkumZYjJHlAThCjNc=
github.com/zenazn/goji v0.9.0/go.mod h1:7S9M489iMyHBNxwZnk9/EHS098H4/F6TATF2mIxtB1Q=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20190425163242-31fd60d6bfdc/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=

{
  "schemaVersion": 1,
  "goal": "verify github.com/rs/zerolog.DebugLevel in pkg:golang/github.com/rs/zerolog@v1.15.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/rs/zerolog@v1.15.0"
  ],
  "symbols": [
    "github.com/rs/zerolog.DebugLevel"
  ]
}

package sample

import (
	"bytes"

	"github.com/rs/zerolog"
)

// NewDebugLogger creates a zerolog logger configured with DebugLevel writing to a buffer.
func NewDebugLogger(buf *bytes.Buffer) zerolog.Logger {
	return zerolog.New(buf).Level(zerolog.DebugLevel)
}

// LogDebug writes a debug message to the logger.
func LogDebug(logger zerolog.Logger, msg string) {
	logger.Debug().Msg(msg)
}

// ParseDebugLevel parses the string representation of DebugLevel.
func ParseDebugLevel(lvlStr string) (zerolog.Level, error) {
	return zerolog.ParseLevel(lvlStr)
}

// IsDebugLevel checks whether the given level matches zerolog.DebugLevel.
func IsDebugLevel(lvl zerolog.Level) bool {
	return lvl == zerolog.DebugLevel
}