}

    void assertMetadataExists() {
        assert verificationFile.exists(): "Verification file ${verificationFile} is missing"
    }

    void assertMetadataIsMissing() {
        assert !verificationFile.exists() : "Expected verification file ${verificationFile} to be absent but it exists"
    }

    void deleteMetadataFile() {
        assertMetadataExists()

    def "can generate an empty verification file"() {
        when:
        succeeds ':help'

        then:
        assertMetadataIsMissing()

        when:
        writeVerificationMetadata()
        succeeds ':help'

        then:
        assertMetadataExists()
        hasNoModules()
    }