given:
        1 * windowsRegistry.getStringValue(_, _, "14.0") >> visualCppDir

        when:
        VisualCppInstallCandidate metadata = metadataProvider.getVisualCppFromRegistry("14.0")

        then:
        metadata.version == VersionNumber.parse("14.0")
        metadata.visualCppDir == visualCppDir
    }

    def "returns null when metadata cannot be derived from registry"() {

        _ * visualCppMetadataProvider.getVisualCppFromRegistry(_) >> null
    }

    void invalidVS2017Installations() {
        _ * visualCppMetadataProvider.getVisualCppFromMetadataFile(_) >> null
        _ * visualCppMetadataProvider.getVisualCppFromRegistry(_) >> { args -> visualCppMetadata(localRoot.createDir("Program Files/Microsoft Visual Studio ${args[0]}/VC"), args[0]) }

import java.io.File;

public interface VisualCppMetadataProvider {
    VisualCppInstallCandidate getVisualCppFromMetadataFile(File installDir);

    VisualCppInstallCandidate getVisualCppFromRegistry(String version);

    public DefaultVisualCppMetadataProvider(WindowsRegistry windowsRegistry) {
        this.windowsRegistry = windowsRegistry;
    }

    @Override
    public VisualCppInstallCandidate getVisualCppFromRegistry(String version) {
        for (String baseKey : REGISTRY_BASEPATHS) {
            try {

        if (VersionNumber.parse(version).getMajor() >= 15) {
            return visualCppMetadataProvider.getVisualCppFromMetadataFile(installDir);
        } else {
            return visualCppMetadataProvider.getVisualCppFromRegistry(version);
        }
    }