override fun closeTargetScopeOf(scriptHost: KotlinScriptHost<*>) = Unit

        override fun hashOf(classPath: ClassPath): HashCode =
            TestHashCodes.hashCodeFrom(0)

        override fun runCompileBuildOperation(scriptPath: String, stage: String, action: () -> String): String =
            action()

        override fun onScriptClassLoaded(scriptSource: ScriptSource, specializedProgram: Class<*>) = Unit

            on { serviceRegistryFor(any(), any()) } doReturn mockServiceRegistry

            on { startCompilerOperation(any()) } doReturn compilerOperation

            on { runCompileBuildOperation(any(), any(), any()) } doAnswer { it.getArgument<() -> String>(2)() }

            on {
                cachedDirFor(
                    any(),
                    eq(stage1ProgramId),