example.com/cmd contains main packages.

-- .info --
{"Version":"v1.9.0"}
-- .mod --
module example.com/cmd

go 1.16

// this is a bad version
retract v1.9.0
-- go.mod --
module example.com/cmd

go 1.16

// this is a bad version
retract v1.9.0
-- a/a.go --
package main

func main() {}
-- b/b.go --
package main

func main() {}
-- err/err.go --
package err

example.com/downgrade/v2 v2.0.1
written by hand

-- .mod --
module example.com/downgrade/v2

require rsc.io/quote v1.5.2
-- .info --
{"Version":"v2.0.1"}
-- go.mod --
module example.com/downgrade/v2

example.com/latemigrate/v2 v2.0.0
written by hand

This repository migrated to modules in v2.0.1 after v2.0.0 was already tagged.
All versions require rsc.io/quote so we can test downgrades.

v2.0.0 is technically part of example.com/latemigrate as v2.0.0+incompatible.
Proxies may serve it as part of the version list for example.com/latemigrate/v2.
'go get' must be able to ignore these versions.

-- .mod --
module example.com/latemigrate
-- .info --

with the same version.

-- .mod --
module example.net/ambiguous

go 1.16
-- .info --
{"Version": "v0.2.0"}
-- go.mod --
module example.net/ambiguous

go 1.16
-- nested/pkg/README.txt --
// Package pkg no longer exists in this module at v0.2.0.

example.com/badchain/c v1.1.0

-- .mod --
module badchain.example.com/c
-- .info --
{"Version":"v1.1.0"}
-- c.go --

-- .info --
{"Version":"v1.0.0"}
-- .mod --
module example.com/dotname

go 1.16
-- go.mod --
module example.com/dotname

go 1.16
-- .dot/dot.go --

Written by hand.
Test case for getting a package that has been moved to a different module.

-- .mod --
module example.com/split/subpkg

require example.com/split v1.1.0
-- .info --
{"Version": "v1.1.0"}
-- x.go --

This module requires example.com/missingpkg at a prerelease version, which
is newer than @latest.

-- .mod --
module example.com/usemissingpre

require example.com/missingpkg v1.0.1-beta
-- .info --
{"Version":"v1.0.0"}
-- use.go --
package use

Written by hand.
Test case for nested modules without an explicit relationship.
This is nested below the top-level module.

-- .mod --
module example.com/nest/sub
-- .info --
{"Version": "v1.0.0"}
-- go.mod --
module example.com/nest/sub
-- y/y.go --

plugins {
    id('java')
    id('com.example.jacoco')
}

group = 'com.example.myproduct'

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(8)
    }
}

dependencies {
    implementation(platform('com.example.platform:product-platform'))

    testImplementation(platform('com.example.platform:test-platform'))
    testImplementation('org.junit.jupiter:junit-jupiter')