Function test_template_py

tests/test-jinja.cpp:2015–2082

)";

static void test_template_py(testing & t, const std::string & name, const std::string & tmpl, const json & vars, const std::string & expect) {
    t.test(name, [&tmpl, &vars, &expect](testing & t) {
        // Prepare arguments
        json merged;
        merged["tmpl"] = json(tmpl);
        merged["vars"] = vars;

#ifdef _WIN32
        const char * python_executable = "python.exe";
#else
        const char * python_executable = "python3";
#endif

        const char * command_line[] = {python_executable, "-c", py_script.c_str(), NULL};

        struct subprocess_s subprocess;
        int options = subprocess_option_combined_stdout_stderr
                    | subprocess_option_no_window
                    | subprocess_option_inherit_environment
                    | subprocess_option_search_user_path;
        int result = subprocess_create(command_line, options, &subprocess);

        if (result != 0) {
            t.log("Failed to create subprocess, error code: " + std::to_string(result));
            t.assert_true("subprocess creation", false);
            return;
        }
        FILE * p_stdin = subprocess_stdin(&subprocess);

        // Write input
        std::string input = merged.dump();
        auto written = fwrite(input.c_str(), 1, input.size(), p_stdin);
        if (written != input.size()) {
            t.log("Failed to write complete input to subprocess stdin");
            t.assert_true("subprocess stdin write", false);
            subprocess_destroy(&subprocess);
            return;
        }
        fflush(p_stdin);
        fclose(p_stdin); // Close stdin to signal EOF to the Python process
        subprocess.stdin_file = nullptr;

        // Read output
        std::string output;
        char buffer[1024];
        FILE * p_stdout = subprocess_stdout(&subprocess);
        while (fgets(buffer, sizeof(buffer), p_stdout)) {
            output += buffer;
        }

        int process_return;
        subprocess_join(&subprocess, &process_return);
        subprocess_destroy(&subprocess);

        if (process_return != 0) {
            t.log("Python script failed with exit code: " + std::to_string(process_return));
            t.log("Output: " + output);
            t.assert_true("python execution", false);