void createScanner()

in testsuite/jflex-testsuite-maven-plugin/src/main/java/jflex/maven/plugin/testsuite/TestCase.java [161:264]
90 lines of code
17 McCabe index (conditional complexity)

  void createScanner(File jflexUberJar, boolean verbose)
      throws TestFailException, MojoFailureException {
    File lexFile = new File(testPath, testName + ".flex");
    if (verbose) {
      System.out.println(String.format("Open lex specification [%s]", lexFile));
    }
    if (!lexFile.exists()) {
      throw new MojoFailureException(
          "Cannot open lex definition", new FileNotFoundException(lexFile.getPath()));
    }
    jflexFiles.add(lexFile.getPath());
    // invoke JFlex
    TestResult jflexResult = ExecUtils.execJFlex(jflexCmdln, jflexFiles);
    // System.out.println(jflexResult);

    if (jflexResult.getSuccess()) {
      // Scanner generation successful
      if (TestsuiteUtils.verbose) {
        System.out.println("Scanner generation successful");
      }

      if (expectJFlexFail) {
        System.out.println("JFlex failure expected!");
        throw new TestFailException();
      }

      // check JFlex output conformance
      File expected = new File(testPath, testName + "-flex.output");

      if (expected.exists()) {
        DiffStream check = new DiffStream();
        String diff;
        try {
          diff =
              check.diff(
                  jflexDiff, new StringReader(jflexResult.getOutput()), new FileReader(expected));
        } catch (FileNotFoundException e) {
          System.out.println("Error opening file " + expected);
          throw new TestFailException();
        }
        if (diff != null) {
          System.out.println("Test failed, unexpected jflex output: " + diff);
          System.out.println("JFlex output: " + jflexResult.getOutput());
          throw new TestFailException();
        }
      } else {
        System.out.println("Warning: no file for expected output [" + expected + "]");
      }

      // Compile Scanner
      final List<String> toCompile = getFilesToCompile();
      if (TestsuiteUtils.verbose) {
        System.out.println("File(s) to compile: " + toCompile);
      }
      try {
        TestResult javacResult =
            ExecUtils.execJavac(toCompile, testPath, jflexUberJar.getAbsolutePath(), javacEncoding);

        // System.out.println(javacResult);
        if (TestsuiteUtils.verbose) {
          System.out.println(
              "Compilation successful: "
                  + javacResult.getSuccess()
                  + " [expected: "
                  + !expectJavacFail
                  + "]");
        }
        if (javacResult.getSuccess() == expectJavacFail) {
          throw new TestFailException(
              "Compilation failed in " + testPath + " for " + toCompile,
              new Exception(javacResult.getOutput()));
        }
      } catch (FileNotFoundException e) {
        throw new TestFailException("javac: file not found: ", e);
      }
    } else {
      if (!expectJFlexFail) {
        System.out.println("Scanner generation failed!");
        System.out.println("JFlex output was:\n" + jflexResult.getOutput());
        throw new TestFailException();
      } else {
        // check JFlex output conformance
        File expected = new File(testPath, testName + "-flex.output");

        if (expected.exists()) {
          DiffStream check = new DiffStream();
          String diff;
          try {
            diff =
                check.diff(
                    jflexDiff, new StringReader(jflexResult.getOutput()), new FileReader(expected));
          } catch (FileNotFoundException e) {
            System.out.println("Error opening file " + expected);
            throw new TestFailException();
          }
          if (diff != null) {
            System.out.println("Test failed, unexpected jflex output: " + diff);
            System.out.println("JFlex output: " + jflexResult.getOutput());
            throw new TestFailException();
          }
        }
      }
    }
  }