delegate.withEnvironment(environmentVariables)
        return this
    }

    @Override
    SmokeTestGradleRunner forwardStdOutput(Writer writer) {
        delegate.forwardStdOutput(writer)
        return this
    }

    @Override
    SmokeTestGradleRunner forwardStdError(Writer writer) {
        delegate.forwardStdError(writer)
        return this

                .withProjectDir(testProjectDir)
                .withArguments('$DUMMY_TASK_NAME')
                .withDebug($debug)
                .withStandardInput(stdin)
                .forwardStdOutput(stdout)
                .build()

            then:
            result.output.contains('$PROMPT')
            result.output.contains('${answerOutput(true)}')
        """)

        then:

    @Override
    public GradleRunner withEnvironment(Map<String, String> environment) {
        this.environment = environment;
        return this;
    }

    @Override
    public GradleRunner forwardStdOutput(Writer writer) {
        if (forwardingSystemStreams) {
            forwardingSystemStreams = false;
            this.standardError = null;
        }
        validateArgumentNotNull(writer, "standardOutput");