this.output = output;
        }

        @Override
        public void start() {
        }

        @Override
        public String getOutput() {
            return output;
        }
    }

    private static class TestSystemHelper extends SystemHelper {
        File tempFile;

        @Override

        }

        @Override
        public void run() {
            // Override run to do nothing in test
        }

        @Override
        public String getOutput() {
            return output;
        }
    }

    private static class TestServletContext implements ServletContext {
        File parentFile = new File("/test/webapp");

        @Override

        // Custom join method to avoid overriding final Thread.join()
        public void waitForCompletion(long millis) {
            // Mock implementation
        }

        @Override
        public String getOutput() {
            return output;
        }
    }

    // Mock Process implementation
    private class MockProcess extends Process {
        private final int exitValue;

    // Create a session for this graph
    CSession csession(host_graph_, s_);
    ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);

    // Run
    csession.SetInputs(inputs);
    csession.SetOutputs(outputs);
    csession.Run(s_);
    ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);

    // Check results
    for (int i = 0; i < expected_results.size(); ++i) {