public static TestResult execClass()

in testsuite/jflex-testsuite-maven-plugin/src/main/java/jflex/maven/plugin/testsuite/ExecUtils.java [119:187]
51 lines of code
7 McCabe index (conditional complexity)

  public static TestResult execClass(
      String theClass,
      String path,
      List<String> files,
      List<File> additionalJars,
      String outputFileEncoding,
      List<String> cmdline)
      throws UnsupportedEncodingException {

    String[] cmd = toArray(cmdline, files);
    Class<?> c;
    Method main;
    Class<?>[] sig = {String[].class};

    // System.out.println("exec class "+theClass);
    // System.out.println("cmdline "+cmdline+"\nfiles: "+files);

    CustomClassLoader l = new CustomClassLoader(path);
    // Locate the shaded jar in the lib directory
    // TODO(regisd) Alternatively, we could load JFlex and its dependency graph.
    try {
      for (File jar : additionalJars) {
        // We are in $basedir/testsuite/testcases
        l.addPath(jar);
      }
    } catch (FileNotFoundException e) {
      throw new RuntimeException(e);
    }

    try {
      c = l.loadClass(theClass, true);
    } catch (ClassNotFoundException e) {
      System.out.println("no such class: " + e);
      return null;
    }

    try {
      main = c.getMethod("main", sig);
    } catch (NoSuchMethodException e) {
      System.out.println("no main: " + e);
      return null;
    }

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    boolean success = true;

    // System.out.println("loaded class "+theClass);

    PrintStream stdOut = System.out;
    System.setOut(new PrintStream(out, true));

    try {
      Object[] params = {cmd};
      main.invoke(null, params);
      System.setOut(stdOut);
    } catch (IllegalAccessException e) {
      System.setOut(stdOut);
      System.out.println("main not public :" + e + main);
      return null;
    } catch (InvocationTargetException e) {
      System.setOut(stdOut);
      System.out.println("test subject threw exception :" + e);
      success = false;
    }

    // System.out.println("finished exec class "+theClass);

    return new TestResult(out.toString(outputFileEncoding), success);
  }