github.com/Masterminds/semver/v3 v3.3.0: Version

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/Masterminds/semver/v3.Version in pkg:golang/github.com/Masterminds/semver/v3@v3.3.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/Masterminds/semver/v3@v3.3.0
Demonstrate these symbols/APIs:
  - github.com/Masterminds/semver/v3.Version

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:sha256:1f55584d81058a4eff727d4c73df26be7afe9f353258d59668e00241473e4b97","contract":["semver.Version parses valid semantic versions and exposes major, minor, patch, prerelease, and metadata components","semver.Version evaluates precedence comparison ignoring build metadata","semver.Version creates incremented versions clearing prerelease and metadata tags","semver.Version serializes to and deserializes from JSON correctly"],"goal":"verify github.com/Masterminds/semver/v3.Version in pkg:golang/github.com/Masterminds/semver/v3@v3.3.0","kind":"HOW","packages":["pkg:golang/github.com/Masterminds/semver/v3@v3.3.0"],"schemaVersion":1,"symbols":["github.com/Masterminds/semver/v3.Version"]},"contractCommand":["go","test","./..."],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","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/Masterminds/semver/v3@v3.3.0"],"schemaVersion":1,"subject":"pkg:golang/github.com/Masterminds/semver/v3@v3.3.0","symbols":["github.com/Masterminds/semver/v3.Version"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require github.com/Masterminds/semver/v3 v3.3.0

github.com/Masterminds/semver/v3 v3.3.0 h1:B8LGeaivUe71a5qox1ICM/JLl0NqZSW5CHyL+hmvYS0=
github.com/Masterminds/semver/v3 v3.3.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=

package sample

import (
	"encoding/json"
	"fmt"

	"github.com/Masterminds/semver/v3"
)

// ParseVersion parses a semantic version string into a *semver.Version.
func ParseVersion(raw string) (*semver.Version, error) {
	v, err := semver.NewVersion(raw)
	if err != nil {
		return nil, fmt.Errorf("failed to parse semver %q: %w", raw, err)
	}
	return v, nil
}

// GetVersionComponents extracts components from a semver.Version.
func GetVersionComponents(v *semver.Version) (major, minor, patch uint64, prerelease, metadata string) {
	return v.Major(), v.Minor(), v.Patch(), v.Prerelease(), v.Metadata()
}

// ComparePrecedence compares two Version instances according to SemVer precedence.
// Returns -1 if a < b, 0 if a == b (build metadata ignored), and 1 if a > b.
func ComparePrecedence(a, b *semver.Version) int {
	return a.Compare(b)
}

// IsEqualPrecedence tests if two Version instances are equal in precedence.
func IsEqualPrecedence(a, b *semver.Version) bool {
	return a.Equal(b)
}

// IncrementRelease generates incremented major, minor, and patch Versions.
func IncrementRelease(v *semver.Version) (major, minor, patch *semver.Version) {
	maj := v.IncMajor()
	min := v.IncMinor()
	pat := v.IncPatch()
	return &maj, &min, &pat
}

// SerializeJSON serializes a semver.Version to JSON.
func SerializeJSON(v *semver.Version) ([]byte, error) {
	return json.Marshal(v)
}

// DeserializeJSON deserializes JSON into a semver.Version.
func DeserializeJSON(data []byte) (*semver.Version, error) {
	var v semver.Version
	if err := json.Unmarshal(data, &v); err != nil {
		return nil, fmt.Errorf("failed to deserialize semver: %w", err)
	}
	return &v, nil
}

{
  "schemaVersion": 1,
  "goal": "verify github.com/Masterminds/semver/v3.Version in pkg:golang/github.com/Masterminds/semver/v3@v3.3.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/Masterminds/semver/v3@v3.3.0"
  ],
  "symbols": [
    "github.com/Masterminds/semver/v3.Version"
  ]
}

package test

import (
	"bytes"
	"testing"

	"example.com/sample"
	"github.com/Masterminds/semver/v3"
)

func TestVersionComponents(t *testing.T) {
	v, err := sample.ParseVersion("v1.2.3-beta.1+sha.exp")
	if err != nil {
		t.Fatalf("unexpected parse error: %v", err)
	}

	major, minor, patch, prerelease, metadata := sample.GetVersionComponents(v)
	if major != 1 || minor != 2 || patch != 3 {
		t.Fatalf("expected version 1.2.3, got %d.%d.%d", major, minor, patch)
	}
	if prerelease != "beta.1" {
		t.Fatalf("expected prerelease 'beta.1', got %q", prerelease)
	}
	if metadata != "sha.exp" {
		t.Fatalf("expected metadata 'sha.exp', got %q", metadata)
	}
}

func TestVersionPrecedenceAndEquality(t *testing.T) {
	v1, err := semver.NewVersion("1.0.0-alpha")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	v2, err := semver.NewVersion("1.0.0-beta")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	v3, err := semver.NewVersion("1.0.0+build.1")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	v4, err := semver.NewVersion("1.0.0+build.2")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	// 1.0.0-alpha < 1.0.0-beta
	if sample.ComparePrecedence(v1, v2) != -1 {
		t.Fatalf("expected v1 < v2 in precedence")
	}
	if !v1.LessThan(v2) {
		t.Fatalf("expected v1.LessThan(v2) == true")
	}

	// Build metadata must be ignored in precedence comparison
	if sample.ComparePrecedence(v3, v4) != 0 {
		t.Fatalf("expected v3 == v4 in precedence comparison despite build metadata")
	}
	if !sample.IsEqualPrecedence(v3, v4) {
		t.Fatalf("expected v3.Equal(v4) == true")
	}
}

func TestVersionIncrement(t *testing.T) {
	// Bumping a prerelease version removes prerelease metadata:
	// For "1.2.3-rc.1+build.99", IncPatch yields "1.2.3"
	vPre, err := sample.ParseVersion("1.2.3-rc.1+build.99")
	if err != nil {
		t.Fatalf("unexpected parse error: %v", err)
	}
	majPre, minPre, patPre := sample.IncrementRelease(vPre)
	if majPre.String() != "2.0.0" {
		t.Fatalf("expected major bump 2.0.0, got %s", majPre.String())
	}
	if minPre.String() != "1.3.0" {
		t.Fatalf("expected minor bump 1.3.0, got %s", minPre.String())
	}
	if patPre.String() != "1.2.3" {
		t.Fatalf("expected patch bump of prerelease 1.2.3-rc.1 to be 1.2.3, got %s", patPre.String())
	}
	if majPre.Prerelease() != "" || majPre.Metadata() != "" {
		t.Fatalf("expected empty prerelease and metadata on incremented major")
	}

	// Bumping a stable release increments numeric patch:
	vRel, err := sample.ParseVersion("1.2.3")
	if err != nil {
		t.Fatalf("unexpected parse error: %v", err)
	}
	_, _, patRel := sample.IncrementRelease(vRel)
	if patRel.String() != "1.2.4" {
		t.Fatalf("expected patch bump of stable 1.2.3 to be 1.2.4, got %s", patRel.String())
	}
}

func TestVersionJSONSerialization(t *testing.T) {
	v, err := sample.ParseVersion("2.1.0-beta.2+exp.sha")
	if err != nil {
		t.Fatalf("unexpected parse error: %v", err)
	}

	data, err := sample.SerializeJSON(v)
	if err != nil {
		t.Fatalf("failed to serialize Version to JSON: %v", err)
	}

	expected := []byte(`"2.1.0-beta.2+exp.sha"`)
	if !bytes.Equal(data, expected) {
		t.Fatalf("expected JSON %s, got %s", string(expected), string(data))
	}

	deserialized, err := sample.DeserializeJSON(data)
	if err != nil {
		t.Fatalf("failed to deserialize Version from JSON: %v", err)
	}

	if !deserialized.Equal(v) {
		t.Fatalf("deserialized version precedence differs from original")
	}
	if deserialized.String() != v.String() {
		t.Fatalf("expected deserialized string %q, got %q", v.String(), deserialized.String())
	}
}