Package tests.net.sf.jabref.bst

Source Code of tests.net.sf.jabref.bst.TestVM

package tests.net.sf.jabref.bst;

import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Collection;
import java.util.Vector;

import junit.framework.TestCase;
import net.sf.jabref.BibtexEntry;
import net.sf.jabref.bst.VM;
import net.sf.jabref.bst.VMException;
import net.sf.jabref.bst.VM.BstEntry;
import net.sf.jabref.bst.VM.StackFunction;
import net.sf.jabref.imports.BibtexParser;
import net.sf.jabref.imports.ParserResult;

import org.antlr.runtime.RecognitionException;


public class TestVM extends TestCase {

  public void testAbbrv() throws RecognitionException, IOException {
    VM vm = new VM(new File("src/tests/net/sf/jabref/bst/abbrv.bst"));
    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());
   
    String expected = "\\begin{thebibliography}{1}\\bibitem{canh05}K.~Crowston, H.~Annabi, J.~Howison, and C.~Masango.\\newblock Effective work practices for floss development: A model and  propositions.\\newblock In {\\em Hawaii International Conference On System Sciences (HICSS)}, 2005.\\end{thebibliography}";
   
    assertEquals(expected.replaceAll("\\s", ""), vm.run(v).replaceAll("\\s", ""));
  }

  public void testVMSimple() throws RecognitionException, IOException {

    VM vm = new VM("" + "ENTRY  { " + "  address " + "  author " + "  title " + "  type "
      + "}  {}  { label }" + "INTEGERS { output.state before.all"
      + " mid.sentence after.sentence after.block }"
      + "FUNCTION {init.state.consts}{ #0 'before.all := "
      + " #1 'mid.sentence :=  #2 'after.sentence :=  #3 'after.block := } "
      + "STRINGS { s t } " + "READ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());

    vm.run(v);

    assertEquals(2, vm.getStrings().size());
    assertEquals(7, vm.getIntegers().size());
    assertEquals(1, vm.getEntries().size());
    assertEquals(5, (vm.getEntries().get(0)).getFields().size());
    assertEquals(38, vm.getFunctions().size());

  }

  public void testLabel() throws RecognitionException, IOException {

    VM vm = new VM("" + "ENTRY  { title }  {}  { label } "
      + "FUNCTION { test } { label #0 = title 'label := #5 label #6 pop$ } " + "READ "
      + "ITERATE { test }");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());

    vm.run(v);

    assertEquals("Effective work practices for floss development: A model and propositions", vm
      .getStack().pop());

  }

  public void testQuote() throws RecognitionException, IOException {

    VM vm = new VM("FUNCTION {a}{ quote$ quote$ * } EXECUTE {a}");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);

    assertEquals("\"\"", vm.getStack().pop());
  }

  public void testVMFunction1() throws RecognitionException, IOException {

    VM vm = new VM("FUNCTION {init.state.consts}{ #0 'before.all := } ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);

    assertEquals(38, vm.getFunctions().size());

    assertTrue(vm.getFunctions().get("init.state.consts") instanceof StackFunction);

    StackFunction fun = (StackFunction) vm.getFunctions().get("init.state.consts");
    assertEquals(3, fun.getTree().getChildCount());
  }

  public void testVMExecuteSimple() throws RecognitionException, IOException {

    {
      VM vm = new VM("" + "INTEGERS { variable.a } "
        + "FUNCTION {init.state.consts}{ #5 'variable.a := } "
        + "EXECUTE {init.state.consts}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals(new Integer(5), vm.getIntegers().get("variable.a"));
    }
    {
      VM vm = new VM("FUNCTION {a}{ #5 #5 = " + "#1 #2 = " + "#3 #4 < " + "#4 #3 < "
        + "#4 #4 < " + "#3 #4 > " + "#4 #3 > " + "#4 #4 > " + "\"H\" \"H\" = "
        + "\"H\" \"Ha\" = } " + "EXECUTE {a}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);

      assertEquals(VM.FALSE, vm.getStack().pop());
      assertEquals(VM.TRUE, vm.getStack().pop());
      assertEquals(VM.FALSE, vm.getStack().pop());
      assertEquals(VM.TRUE, vm.getStack().pop());
      assertEquals(VM.FALSE, vm.getStack().pop());
      assertEquals(VM.FALSE, vm.getStack().pop());
      assertEquals(VM.FALSE, vm.getStack().pop());
      assertEquals(VM.TRUE, vm.getStack().pop());
      assertEquals(VM.FALSE, vm.getStack().pop());
      assertEquals(VM.TRUE, vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
  }

  public void testVMIfSkipPop() throws RecognitionException, IOException {
    VM vm = new VM("FUNCTION {not}  {   { #0 }      { #1 }  if$  }"
      + "FUNCTION {and}  {   'skip$      { pop$ #0 }    if$  }"
      + "FUNCTION {or}  {   { pop$ #1 }      'skip$    if$  }" + "FUNCTION {test} { "
      + "#1 #1 and #0 #1 and #1 #0 and #0 #0 and " + "#0 not #1 not "
      + "#1 #1 or #0 #1 or #1 #0 or #0 #0 or }" + "EXECUTE {test}");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);
    assertEquals(VM.FALSE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.FALSE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.FALSE, vm.getStack().pop());
    assertEquals(VM.FALSE, vm.getStack().pop());
    assertEquals(VM.FALSE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testVMArithmetic() throws RecognitionException, IOException {
    {
      VM vm = new VM("FUNCTION {test} { " + "#1 #1 + #5 #2 - }" + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals(new Integer(3), vm.getStack().pop());
      assertEquals(new Integer(2), vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
    {
      VM vm = new VM("FUNCTION {test} { " + "#1 \"HELLO\" + #5 #2 - }" + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();

      try {
        vm.run(v);
        fail();
      } catch (VMException e) {

      }
    }
  }

  public void testNumNames() throws RecognitionException, IOException {
    {
      VM vm = new VM("FUNCTION {test} { \"Johnny Foo and Mary Bar\" num.names$ }"
        + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals(new Integer(2), vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
    {
      VM vm = new VM("FUNCTION {test} { \"Johnny Foo { and } Mary Bar\" num.names$ }"
        + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals(new Integer(1), vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
  }

  public void testVMStringOps1() throws RecognitionException, IOException {
    {
      VM vm = new VM(
        "FUNCTION {test} { \"H\" \"allo\" * \"Johnny\" add.period$ \"Johnny.\" add.period$"
          + "\"Johnny!\" add.period$ \"Johnny?\" add.period$ \"Johnny} }}}\" add.period$"
          + "\"Johnny!}\" add.period$ \"Johnny?}\" add.period$ \"Johnny.}\" add.period$ }"
          + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals("Johnny.}", vm.getStack().pop());
      assertEquals("Johnny?}", vm.getStack().pop());
      assertEquals("Johnny!}", vm.getStack().pop());
      assertEquals("Johnny.}", vm.getStack().pop());
      assertEquals("Johnny?", vm.getStack().pop());
      assertEquals("Johnny!", vm.getStack().pop());
      assertEquals("Johnny.", vm.getStack().pop());
      assertEquals("Johnny.", vm.getStack().pop());
      assertEquals("Hallo", vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
  }

  public void testSubstring() throws RecognitionException, IOException {
    VM vm = new VM("FUNCTION {test} " + "{ \"123456789\" #2  #1  substring$ " + // 2
      "  \"123456789\" #4 global.max$ substring$ " + // 456789
      "  \"123456789\" #1  #9  substring$ " + // 123456789
      "  \"123456789\" #1  #10 substring$ " + // 123456789
      "  \"123456789\" #1  #99 substring$ " + // 123456789

      "  \"123456789\" #-7 #3  substring$ " + // 123
      "  \"123456789\" #-1 #1  substring$ " + // 9
      "  \"123456789\" #-1 #3  substring$ " + // 789
      "  \"123456789\" #-2 #2  substring$ " + // 78

      "} EXECUTE {test} ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);
    assertEquals("78", vm.getStack().pop());
    assertEquals("789", vm.getStack().pop());
    assertEquals("9", vm.getStack().pop());
    assertEquals("123", vm.getStack().pop());

    assertEquals("123456789", vm.getStack().pop());
    assertEquals("123456789", vm.getStack().pop());
    assertEquals("123456789", vm.getStack().pop());
    assertEquals("456789", vm.getStack().pop());
    assertEquals("2", vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testEmpty() throws RecognitionException, IOException {
    VM vm = new VM("ENTRY {title}{}{} READ STRINGS { s } FUNCTION {test} " + "{ s empty$ " + // FALSE
      "\"\" empty$ " + // FALSE
      "\"   \" empty$ " + // FALSE
      " title empty$ " + // FALSE
      " \" HALLO \" empty$ } ITERATE {test} ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(bibtexString2BibtexEntry("@article{a, author=\"AAA\"}"));
    vm.run(v);
    assertEquals(VM.FALSE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(VM.TRUE, vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testDuplicateEmptyPopSwapIf() throws RecognitionException, IOException {
    VM vm = new VM("FUNCTION {emphasize} " + "{ duplicate$ empty$ " + "  { pop$ \"\" } "
      + "  { \"{\\em \" swap$ * \"}\" * } " + "  if$ " + "} " + "FUNCTION {test} {"
      + "  \"\" emphasize " + "  \"Hello\" emphasize " + "}" + "EXECUTE {test} ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);
    assertEquals("{\\em Hello}", vm.getStack().pop());
    assertEquals("", vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testChangeCase() throws RecognitionException, IOException {
    VM vm = new VM(
      "STRINGS { title } "
        + "READ "
        + "FUNCTION {format.title}"
        + " { duplicate$ empty$ "
        + "    { pop$ \"\" } "
        + "    { \"t\" change.case$ } "
        + "  if$ "
        + "} "
        + "FUNCTION {test} {"
        + "  \"hello world\" \"u\" change.case$ format.title "
        + "  \"Hello World\" format.title "
        + "  \"\" format.title "
        + "  \"{A}{D}/{C}ycle: {I}{B}{M}'s {F}ramework for {A}pplication {D}evelopment and {C}ase\" \"u\" change.case$ format.title "
        + "}" + "EXECUTE {test} ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);
    assertEquals(
      "{A}{D}/{C}ycle: {I}{B}{M}'s {F}ramework for {A}pplication {D}evelopment and {C}ase",
      vm.getStack().pop());
    assertEquals("", vm.getStack().pop());
    assertEquals("Hello world", vm.getStack().pop());
    assertEquals("Hello world", vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testTextLength() throws RecognitionException, IOException {
    VM vm = new VM("FUNCTION {test} {" + "  \"hello world\" text.length$ "
      + "  \"Hello {W}orld\" text.length$ " + "  \"\" text.length$ "
      + "  \"{A}{D}/{Cycle}\" text.length$ "
      + "  \"{\\This is one character}\" text.length$ "
      + "  \"{\\This {is} {one} {c{h}}aracter as well}\" text.length$ "
      + "  \"{\\And this too\" text.length$ " + "  \"These are {\\11}\" text.length$ " + "} "
      + "EXECUTE {test} ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);
    assertEquals(new Integer(11), vm.getStack().pop());
    assertEquals(new Integer(1), vm.getStack().pop());
    assertEquals(new Integer(1), vm.getStack().pop());
    assertEquals(new Integer(1), vm.getStack().pop());
    assertEquals(new Integer(8), vm.getStack().pop());
    assertEquals(new Integer(0), vm.getStack().pop());
    assertEquals(new Integer(11), vm.getStack().pop());
    assertEquals(new Integer(11), vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testVMIntToStr() throws RecognitionException, IOException {
    VM vm = new VM("FUNCTION {test} { #3 int.to.str$ #9999 int.to.str$}" + "EXECUTE {test}");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);
    assertEquals("9999", (String) vm.getStack().pop());
    assertEquals("3", vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testVMChrToInt() throws RecognitionException, IOException {
    {
      VM vm = new VM("FUNCTION {test} { \"H\" chr.to.int$ }" + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals(new Integer(72), vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
    {
      VM vm = new VM("FUNCTION {test} { \"H\" chr.to.int$ int.to.chr$ }" + "EXECUTE {test}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals("H", vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
  }

  public void testSort() throws RecognitionException, IOException {

    VM vm = new VM("" + "ENTRY  { title }  { }  { label }"
      + "FUNCTION {presort} { cite$ 'sort.key$ := } ITERATE { presort } SORT");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(bibtexString2BibtexEntry("@article{a, author=\"AAA\"}"));
    v.add(bibtexString2BibtexEntry("@article{b, author=\"BBB\"}"));
    v.add(bibtexString2BibtexEntry("@article{d, author=\"DDD\"}"));
    v.add(bibtexString2BibtexEntry("@article{c, author=\"CCC\"}"));
    vm.run(v);

    Vector<BstEntry> v2 = vm.getEntries();
    assertEquals("a", v2.get(0).getBibtexEntry().getCiteKey());
    assertEquals("b", v2.get(1).getBibtexEntry().getCiteKey());
    assertEquals("c", v2.get(2).getBibtexEntry().getCiteKey());
    assertEquals("d", v2.get(3).getBibtexEntry().getCiteKey());
  }

  public void testBuildIn() throws RecognitionException, IOException {
    VM vm = new VM("EXECUTE {global.max$}");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);

    assertEquals(new Integer(Integer.MAX_VALUE), vm.getStack().pop());
    assertTrue(vm.getStack().empty());
  }

  public void testVariables() throws RecognitionException, IOException {

    VM vm = new VM(" STRINGS { t }                          "
      + " FUNCTION {not}  { { #0 } { #1 }  if$ } "
      + " FUNCTION {n.dashify} { \"HELLO-WORLD\" 't := t empty$ not } "
      + " EXECUTE {n.dashify}                    ");

    vm.run(new Vector<BibtexEntry>());

    assertEquals(VM.TRUE, vm.getStack().pop());
  }

  public void testWhile() throws RecognitionException, IOException {

    VM vm = new VM(
      "STRINGS { t }            "
        + "FUNCTION {not}  {   "
        + " { #0 } { #1 }  if$ } "
        + "FUNCTION {n.dashify}              "
        + "{ \"HELLO-WORLD\"                 "
        + "  't :=                           "
        + " \"\"                                                 "
        + "     { t empty$ not }                 "
        + "     { t #1 #1 substring$ \"-\" =                      "
        + "       { t #1 #2 substring$ \"--\" = not "
        + "            { \"--\" *                                       "
        + "              t #2 global.max$ substring$ 't :=                 "
        + "            }                                                    "
        + "            {   { t #1 #1 substring$ \"-\" = }                "
        + "                { \"-\" *                                         "
        + "                  t #2 global.max$ substring$ 't :=               "
        + "                }                                                  "
        + "              while$                                                                  "
        + "            }                                                                  "
        + "          if$                                                                  "
        + "        }                                                                  "
        + "        { t #1 #1 substring$ *                                       "
        + "          t #2 global.max$ substring$ 't :=                          "
        + "        }                                                                  "
        + "        if$                                                                  "
        + "      }                                                                  "
        + "    while$                                                                  "
        + "  }                                                                  "
        + " EXECUTE {n.dashify} ");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);

    assertEquals(1, vm.getStack().size());
    assertEquals("HELLO--WORLD", vm.getStack().pop());
  }

  public void testType() throws RecognitionException, IOException {

    VM vm = new VM(
      ""
        + "ENTRY  { title }  { }  { label }"
        + "FUNCTION {presort} { cite$ 'sort.key$ := } ITERATE { presort } SORT FUNCTION {test} { type$ } ITERATE { test }");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(bibtexString2BibtexEntry("@article{a, author=\"AAA\"}"));
    v.add(bibtexString2BibtexEntry("@book{b, author=\"BBB\"}"));
    v.add(bibtexString2BibtexEntry("@misc{c, author=\"CCC\"}"));
    v.add(bibtexString2BibtexEntry("@inproceedings{d, author=\"DDD\"}"));
    vm.run(v);

    assertEquals(4, vm.getStack().size());
    assertEquals("Inproceedings", vm.getStack().pop());
    assertEquals("Misc", vm.getStack().pop());
    assertEquals("Book", vm.getStack().pop());
    assertEquals("Article", vm.getStack().pop());
  }

  public void testMissing() throws RecognitionException, IOException {

    VM vm = new VM( //
      "ENTRY    { title }  { }  { label } " + //
        "FUNCTION {presort} { cite$ 'sort.key$ := } " + //
        "ITERATE  {presort} " + //
        "READ SORT " + //
        "FUNCTION {test}{ title missing$ cite$ } " + //
        "ITERATE  { test }");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());
    v.add(bibtexString2BibtexEntry("@article{test, author=\"No title\"}"));
    vm.run(v);

    assertEquals(4, vm.getStack().size());

    assertEquals("test", vm.getStack().pop());
    assertEquals(new Integer(1), vm.getStack().pop());
    assertEquals("canh05", vm.getStack().pop());
    assertEquals(new Integer(0), vm.getStack().pop());
  }

  public void testFormatName() throws RecognitionException, IOException {
    {
      VM vm = new VM(
        "FUNCTION {format}{ \"Charles Louis Xavier Joseph de la Vall{\\'e}e Poussin\" #1 \"{vv~}{ll}{, jj}{, f}?\" format.name$ }"
          + "EXECUTE {format}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      vm.run(v);
      assertEquals("de~la Vall{\\'e}e~Poussin, C.~L. X.~J?", (String) vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
    {
      VM vm = new VM("ENTRY  { author }  { }  { label } "
        + "FUNCTION {presort} { cite$ 'sort.key$ := } " + "ITERATE { presort } " + "READ "
        + "SORT " + "FUNCTION {format}{ author #2 \"{vv~}{ll}{, jj}{, f}?\" format.name$ }"
        + "ITERATE {format}");

      Vector<BibtexEntry> v = new Vector<BibtexEntry>();
      v.add(t1BibtexEntry());
      v
        .add(bibtexString2BibtexEntry("@book{test, author=\"Jonathan Meyer and Charles Louis Xavier Joseph de la Vall{\\'e}e Poussin\"}"));
      vm.run(v);
      assertEquals("de~la Vall{\\'e}e~Poussin, C.~L. X.~J?", vm.getStack().pop());
      assertEquals("Annabi, H?", vm.getStack().pop());
      assertEquals(0, vm.getStack().size());
    }
  }

  public void testCallType() throws RecognitionException, IOException {

    VM vm = new VM(
      "ENTRY  { title }  { }  { label } FUNCTION {presort} { cite$ 'sort.key$ := } ITERATE { presort } READ SORT "
        + "FUNCTION {inproceedings}{ \"InProceedings called on \" title * } "
        + "FUNCTION {book}{ \"Book called on \" title * } " + " ITERATE { call.type$ }");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());
    v.add(bibtexString2BibtexEntry("@book{test, title=\"Test\"}"));
    vm.run(v);

    assertEquals(2, vm.getStack().size());

    assertEquals("Book called on Test", vm.getStack().pop());
    assertEquals(
      "InProceedings called on Effective work practices for floss development: A model and propositions",
      vm.getStack().pop());
    assertEquals(0, vm.getStack().size());
  }

  public void testIterate() throws RecognitionException, IOException {

    VM vm = new VM("" + "ENTRY  { " + "  address " + "  author " + "  title " + "  type "
      + "}  {}  { label } " + "FUNCTION {test}{ cite$ } " + "READ " + "ITERATE { test }");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());

    v.add(bibtexString2BibtexEntry("@article{test, title=\"BLA\"}"));

    vm.run(v);

    assertEquals(2, vm.getStack().size());

    String s1 = (String) vm.getStack().pop();
    String s2 = (String) vm.getStack().pop();

    if (s1.equals("canh05")) {
      assertEquals("test", s2);
    } else {
      assertEquals("canh05", s2);
      assertEquals("test", s1);
    }
  }

  public void testWidth() throws RecognitionException, IOException {

    VM vm = new VM("ENTRY  { " + "  address " + "  author " + "  title " + "  type "
      + "}  {}  { label } " + //
      "STRINGS { longest.label } " + //
      "INTEGERS { number.label longest.label.width } " + //
      "FUNCTION {initialize.longest.label} " + //
      "{ \"\" 'longest.label := " + //
      "  #1 'number.label := " + //
      "  #0 'longest.label.width := " + //
      "} " + //
      " " + //
      "    FUNCTION {longest.label.pass} " + //
      "    { number.label int.to.str$ 'label := " + //
      "      number.label #1 + 'number.label := " + //
      "      label width$ longest.label.width > " + //
      "        { label 'longest.label := " + //
      "          label width$ 'longest.label.width := " + //
      "        } " + //
      "        'skip$ " + //
      "      if$ " + //
      "    } " + //
      " " + //
      "    EXECUTE {initialize.longest.label} " + //
      " " + //
      "    ITERATE {longest.label.pass} " + //
      "FUNCTION {begin.bib} " + //
      "{ preamble$ empty$" + //
      "    'skip$" + //
      "    { preamble$ write$ newline$ }" + //
      "  if$" + //
      "  \"\\begin{thebibliography}{\"  longest.label  * \"}\" *" + //
      "}" + //
      "EXECUTE {begin.bib}" + //
      "");//

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(t1BibtexEntry());

    vm.run(v);

    assertTrue(vm.getIntegers().containsKey("longest.label.width"));
    assertEquals("\\begin{thebibliography}{1}", vm.getStack().pop());
  }

  public void testVMSwap() throws RecognitionException, IOException {

    VM vm = new VM("FUNCTION {a}{ #3 \"Hallo\" swap$ } EXECUTE { a }");

    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    vm.run(v);

    assertEquals(2, vm.getStack().size());
    assertEquals(new Integer(3), vm.getStack().pop());
    assertEquals("Hallo", vm.getStack().pop());
  }

  public static BibtexEntry bibtexString2BibtexEntry(String s) throws IOException {
    ParserResult result = BibtexParser.parse(new StringReader(s));
    Collection<BibtexEntry> c = result.getDatabase().getEntries();
    assertEquals(1, c.size());
    return c.iterator().next();
  }

  public static String bibtexEntry2BibtexString(BibtexEntry e) throws IOException {
    StringWriter sw = new StringWriter();
    e.write(sw, new net.sf.jabref.export.LatexFieldFormatter(), false);
    return sw.getBuffer().toString();
  }

  /* TEST DATA */
  public String t1BibtexString() {
    return "@inproceedings{canh05,\n"
      + "  author = {Crowston, K. and Annabi, H. and Howison, J. and Masango, C.},\n"
      + "  title = {Effective work practices for floss development: A model and propositions},\n"
      + "  booktitle = {Hawaii International Conference On System Sciences (HICSS)},\n"
      + "  year = {2005},\n" + "  owner = {oezbek},\n" + "  timestamp = {2006.05.29},\n"
      + "  url = {http://james.howison.name/publications.html}}\n";
  }

  public void testHypthenatedName() throws RecognitionException, IOException {
    VM vm = new VM(new File("src/tests/net/sf/jabref/bst/abbrv.bst"));
    Vector<BibtexEntry> v = new Vector<BibtexEntry>();
    v.add(bibtexString2BibtexEntry("@article{canh05, author = \"Jean-Paul Sartre\" }"));
    assertTrue(vm.run(v).indexOf("J.-P. Sartre") != -1);
  }

  public BibtexEntry t1BibtexEntry() throws IOException {
    return bibtexString2BibtexEntry(t1BibtexString());
  }

}
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