Subversion Repositories openrisc

/* This tests some corner cases of arithmetic in StringBuffer.  */

/* These tests can all be run on a 32 bit machine with modest amounts

 * of memory.  */

/* The symptom of the problem is that ArrayIndexOutOfBoundsException

 * gets thrown, while the documentation says that

 * StringIndexOutOfBoundsException should be thrown.  */

class StringBuffer_overflow

{

  /* Test correct exception on getChars.  */

  static void getChars()

  {

    StringBuffer b = new StringBuffer ("x");

    char[] s = new char [1];

    try

      {

        // The substring we are attempting to obtain is invalid,

        // so we should get a StringIndexOutOfBoundsException.

        b.getChars (1, -1 << 31, s, 0);

        Fail ("getChars", "no exception");

      }

    catch (Throwable e)

      {

        ExpectStringIndex ("getChars()", e);

      }

  }

  /* Test correct exception on append with bogus count. */

  static void append()

  {

    StringBuffer s = new StringBuffer("a");

    try

      {

        s.append ("".toCharArray(), 1, (1<<31)-1);

        Fail ("append", "no exception");

      }

    catch (Throwable e)

      {

        ExpectStringIndex ("append", e);

      }

  }

  // Check that append still more or less works.

  static void appendbasic()

  {

    StringBuffer s = new StringBuffer();

    try

      {

        if (!new StringBuffer().append ("abcdefg".toCharArray())

            .toString().equals ("abcdefg"))

          {

            Fail ("appendbasic", "append gives incorrect result");

          }

      }

    catch (Throwable e)

      {

        Fail ("appendbasic", e);

      }

  }

  /* Test correct expception on substring with bogus indexes.  */

  static void substring()

  {

    StringBuffer s = new StringBuffer ("abc");

    try

      {

        // end - begin == -2 - ((1<<31)-1) == (1<<31) - 1 > 0.  */

        s.substring ((1<<31)-1, -2);

        Fail ("substring", "no exception");

      }

    catch (Throwable e)

      {

        ExpectStringIndex ("substring", e);

      }

  }

  static void insert()

  {

    StringBuffer s = new StringBuffer ("");

    try

      {

        s.insert (0, "abcd".toCharArray(), (1<<31)-1, 1);

        Fail ("insert", "no exception");

      }

    catch (Throwable e)

      {

        ExpectStringIndex ("insert", e);

      }

  }

  public static void main (String[] unused)

  {

    getChars();

    append();

    appendbasic();

    substring();

    insert();

    if (tests_failed == 0)

      {

        System.out.println ("ok");

      }

  }

  static int tests_failed = 0;

  static void ExpectStringIndex (String name, Throwable exception)

  {

    if (! (exception instanceof StringIndexOutOfBoundsException))

      {

        Fail (name, exception);

      }

  }

  static void Fail (String name, Object why)

  {

    ++tests_failed;

    System.err.print (name);

    System.err.print ('\t');

    System.err.println (why);

  }

}