Examples with StreamVacuum org.antlr.v4.test.runtime.StreamVacuum used on opensource projects

Example 16 with StreamVacuum

use of org.antlr.v4.test.runtime.StreamVacuum in project antlr4 by antlr.

the class BasePythonTest method execModule.

public String execModule(String fileName) {
    String pythonPath = locatePython();
    String runtimePath = locateRuntime();
    File tmpdirFile = new File(getTempDirPath());
    String modulePath = new File(tmpdirFile, fileName).getAbsolutePath();
    String inputPath = new File(tmpdirFile, "input").getAbsolutePath();
    Path outputPath = tmpdirFile.toPath().resolve("output").toAbsolutePath();
    try {
        ProcessBuilder builder = new ProcessBuilder(pythonPath, modulePath, inputPath, outputPath.toString());
        builder.environment().put("PYTHONPATH", runtimePath);
        builder.environment().put("PYTHONIOENCODING", "utf-8");
        builder.directory(tmpdirFile);
        Process process = builder.start();
        StreamVacuum stderrVacuum = new StreamVacuum(process.getErrorStream());
        stderrVacuum.start();
        process.waitFor();
        stderrVacuum.join();
        String output = TestOutputReading.read(outputPath);
        if (stderrVacuum.toString().length() > 0) {
            setParseErrors(stderrVacuum.toString());
        }
        return output;
    } catch (Exception e) {
        System.err.println("can't exec recognizer");
        e.printStackTrace(System.err);
    }
    return null;
}