Hasher hasher = Hashing.defaultFunction().newHasher();
        hasher.putInt(CACHE_FORMAT);
        hasher.putInt(AsmConstants.MAX_SUPPORTED_JAVA_VERSION);
        gradleCoreInstrumentationTypeRegistry.getInstrumentedTypesHash().ifPresent(hasher::putHash);

    }

    List<TestFile> listCacheFiles() {
        cacheDir.listFiles().findAll { it.name ==~ /\p{XDigit}{${Hashing.defaultFunction().hexDigits}}/ }.sort()
    }

    void deleteCacheEntry(String cacheKey) {
        def entry = getTestFileCacheEntry(cacheKey)
        if (entry.file.exists()) {
            entry.file.deleteDir()
        }

    }

    TestFile getCacheDir() {
        Preconditions.checkNotNull(cacheDir)
    }

    List<TestFile> listCacheFiles() {
        cacheDir.listFiles().findAll { it.name ==~ /\p{XDigit}{${Hashing.defaultFunction().hexDigits}}/ }.sort()
    }

    void deleteCacheFiles() {
        listCacheFiles().each { it.delete() }
    }

    @Override
    WebAppContext getCustomHandler() {
        return webapp
    }