provider.getOrNull() == null
        provider.getOrElse("s2") == "s2"
    }

    def "mapped provider is live"() {
        def transformer = Stub(Transformer)
        transformer.transform(_) >> { String s -> "[$s]" }

        expect:
        def mapped = provider.map(transformer)
        !mapped.present
        mapped.getOrNull() == null
        mapped.getOrElse("s2") == "s2"

        provider.value("abc")

    def "transformer estimates deserialization code size of #cl correctly"() {
        when:
        def classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS)

        LambdaSerializationTransformer transformer = acceptClass(cl, new LambdaSerializationTransformer(classWriter))

        def estimatedDeserializationMethodSize = (
            transformer.estimatedDeserializationPrologueLength

 */

package org.gradle.api.internal.artifacts.transform;

import com.google.common.collect.ImmutableList;
import org.gradle.api.Describable;
import org.gradle.api.artifacts.component.ComponentIdentifier;
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.ResolvableArtifact;

import java.io.File;

/**
 * Transform subject is either an initial artifact for the transform chain or a result of a previous transform step.

            assertIsTransform()
            descriptor.transformer.displayName == "BrokenTransform"
            descriptor.subject.displayName == transformTarget()
            !successful
            failures.size() == 1
            failures[0].description.contains("intentional failure")
        }
    }

    def "does not report transform progress events when TRANSFORM operations are not requested"() {
        given:

                    return "Transformer with $provider"
                }
            }
            transform.provider = new FlatMapProvider(Providers.of("value"), transform)
            return transform.provider
        }
    }

    static class FlatMapProviderCircularChainEvaluationTest extends CircularChainEvaluationSpec<String> implements UsesStringProperty {
        @Override

 */

package org.gradle.operations.dependencies.transforms;

import org.gradle.internal.operations.BuildOperationType;
import org.gradle.internal.scan.NotUsedByScanPlugin;

/**
 * A {@link BuildOperationType} for executing a scheduled transform step.
 * <p>
 * Encompasses the execution of a transform step node.
 * The node runs only one transform, though possibly on multiple files.
 *
 * @since 8.1
 */

        }

        @Override
        public void applyTo(String value, BuildLayoutParameters settings, Origin origin) {
            Transformer<File, String> resolver = new BasicFileResolver(settings.getCurrentDir());
            settings.setGradleUserHomeDir(resolver.transform(value));
        }
    }

    public static class ProjectDirOption extends StringBuildOption<BuildLayoutParameters> {
        public ProjectDirOption() {

    private final PropertiesTransformer transformer;
    private Properties properties;

    protected PropertiesPersistableConfigurationObject(PropertiesTransformer transformer) {
        this.transformer = transformer;
    }

    @Override
    public void load(InputStream inputStream) throws Exception {
        properties = new Properties();

    }

    def "transforms pre-compiled header spec to contain generated source files" () {
        given:
        def tempDir = tmpDirProvider.createDir("temp")
        def pchSourceDir = tempDir.createDir("pchGenerated")
        def headerDir = tmpDirProvider.createDir("headers")
        def sourceFile = headerDir.createFile("test.h")

            }
        }
    }

    private String checkBaselineVersion(Transformer<Boolean, BaselineVersion> fails, Transformer<String, BaselineVersion> provideMessage) {
        def failed = false
        def failure = new StringBuilder()
        baselineVersions.values().each { it ->
            String message = provideMessage.transform(it)
            if (fails.transform(it)) {
                failed = true
                failure.append message