toolchainConfiguration.getJabbaHomeDirectory() >> candidates
    }

    def "supplies no installations for empty directory"() {
        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies no installations for non-existing directory"() {
        given:
        assert candidates.deleteDir()

        when:

    def "supplies no installations for absent output"() {
        given:
        def supplier = new OsXInstallationSupplier(OperatingSystem.MAC_OS, osxJavaHomeCommand)
        osxJavaHomeCommand.findJavaHomes() >> []

        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }


    def "supplies no installations for wrong os"() {
        given:

        expect:
        supplier.roots.length > 1
    }

    def "supplies no installations for non-existing directory"() {
        given:
        def supplier = new LinuxInstallationSupplier(OperatingSystem.LINUX, nonExistent)

        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }


    def "supplies no installations for empty directory"() {
        given:

    def supplier = new LocationListInstallationSupplier(buildOptions, new IdentityFileResolver())

    def "supplies no installations for empty property"() {
        when:
        buildOptions.installationsFromPaths >> []
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies single installations for single path"() {
        when:
        def expectedFile = tmpDir.createDir("foo/bar")

        toolchainConfiguration.getSdkmanCandidatesDirectory() >> candidates

    }

    def "supplies no installations for empty directory"() {
        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies no installations for non-existing directory"() {
        given:
        assert candidates.deleteDir()

        when:

        toolchainConfiguration.getAsdfDataDirectory() >> candidates
    }

    def "supplies no installations for empty directory"() {
        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies no installations for non-existing directory"() {
        given:
        assert candidates.deleteDir()

        when:

        toolchainConfiguration.getIntelliJdkDirectory() >> candidates
    }

    def "supplies no installations for empty directory"() {
        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies no installations for non-existing directory"() {
        given:
        assert candidates.deleteDir()

        when:

    def "supplies no installations for empty property"() {
        when:
        buildOptions.getJavaInstallationsFromEnvironment() >> []
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies single installations for single path"() {
        when:

    def "supplies no installations for absent property"() {
        given:
        def supplier = createSupplier([] as Set)

        when:
        def directories = supplier.get()

        then:
        directories.isEmpty()
    }

    def "supplies single installations for single candidate"() {

area: installation
releaseNotes:
  - |
    **Fixed** an issue preventing the gateway chart from being used with a custom HorizontalPodAutoscaler resource.

upgradeNotes:
  - title: don't set spec.replicas unless user supplies a real number
    content: |
      When using the gateway chart, the user had to either pick between
      explicitly setting `spec.replicas`, or using the chart-supplied