public static final TestFile TEST_DIR = new TestFile(new File(".").toURI());
    public static final IntegrationTestBuildContext INSTANCE = new IntegrationTestBuildContext();

    @Nullable
    public TestFile getGradleHomeDir() {
        return optionalFile("integTest.gradleHomeDir");
    }

    public TestFile getSamplesDir() {
        return file("integTest.samplesdir", null);
    }

import org.gradle.test.fixtures.file.TestFile;
import org.gradle.util.GradleVersion;

public interface GradleDistribution {
    /**
     * Returns the root directory of the installed distribution
     */
    TestFile getGradleHomeDir();

    /**
     * Returns the binary distribution.
     */
    TestFile getBinDistribution();

    /**
     * Returns the version of this distribution.
     */
    GradleVersion getVersion();