Introduced hash valued location markers in the spec

tests/standalone/io/addlatexhash_test.dart

Index: tests/standalone/io/addlatexhash_test.dart
diff --git a/tests/standalone/io/addlatexhash_test.dart b/tests/standalone/io/addlatexhash_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..98f1ba52be528e5aff4420054da4f03526ccfceb
--- /dev/null
+++ b/tests/standalone/io/addlatexhash_test.dart
@@ -0,0 +1,122 @@
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// testing ../../../tools/addlatexhash.dart
+
+import 'dart:io';
+import 'package:path/path.dart' as path;
+import '../../../tools/addlatexhash.dart';
+
+final scriptDir = path.dirname(path.fromUri(Platform.script));
+final dartRootDir = path.dirname(path.dirname(path.dirname(scriptDir)));
+final dartRootPath = dartRootDir.toString();
+
+// Check that the given ProcessResult indicates success; if so
+// return the standard output, otherwise report the failure
+checkAction(result, errorMessage) {
+  if (result.exitCode != 0) {
+    print(result.stdout);
+    print(result.stderr);
+    throw errorMessage;
+  }
+  return result.stdout;
+}
+
+oneTestCutMatch(line, re, expected) {
+  var result = cutMatch(line, new RegExp(re).firstMatch(line));
+  if (result != expected) {
+    throw "cutMatch '$re' from '$line' yields '$result' != '$expected'";
+  }
+}
+
+void testCutMatch() {
+  oneTestCutMatch("test", "", "test");
+  oneTestCutMatch("test", "e", "tst");
+  oneTestCutMatch("test", "te", "st");
+  oneTestCutMatch("test", "st", "te");
+  oneTestCutMatch("test", "test", "");
+}
+
+oneTestSisp(sispFun, nameSuffix, line, expected) {
+  var result = sispFun(line);
+  if (result != expected) {
+    throw "sispIsDart$nameSuffix '$line' yields $result";
+  }
+}
+
+testSisp() {
+  oneTestSisp(sispIsDartBegin, "Begin", "\\begin{dartCode}\n", true);
+  oneTestSisp(sispIsDartBegin, "Begin", " \\begin{dartCode}\n", true);
+  oneTestSisp(sispIsDartBegin, "Begin", "whatever else ..", false);
+  oneTestSisp(sispIsDartEnd, "End", "\\end{dartCode}", true);
+  oneTestSisp(sispIsDartEnd, "End", " \\end{dartCode}\t  \n", true);
+  oneTestSisp(sispIsDartEnd, "End", "whatever else ..", false);
+}
+
+// Check that the LaTeX source transformation done by addlatexhash.dart
+// does not affect the generated output, as seen via dvi2tty and diff.
+// NB: Not part of normal testing (only local): latex and dvi2tty are
+// not installed in the standard test environment.
+testNoChange() {
+  // set up /tmp directory to hold output
+  final tmpDir = Directory.systemTemp.createTempSync("addlatexhash_test");
+  final tmpDirPath = tmpDir.path;
+
+  // file names/paths for original spec
+  const specName = "dartLangSpec";
+  const specFileName = "$specName.tex";
+  final specDirPath = path.join(dartRootDir, "docs", "language");
+  final specPath = path.join(specDirPath, specFileName);
+  final tmpSpecPath = path.join(tmpDirPath, specFileName);
+  const specDviFileName = "$specName.dvi";
+  final specDviPath = path.join(tmpDirPath, specDviFileName);
+
+  // file names/paths for associated sty
+  const styFileName = "dart.sty";
+  final styPath = path.join(specDirPath, styFileName);
+  final tmpStyPath = path.join(tmpDirPath, styFileName);
+
+  // file names paths for output
+  const hashName = "dartLangSpec-hash";
+  const hashFileName = "$hashName.tex";
+  final hashPath = path.join(tmpDirPath, hashFileName);
+  final hashDviPath = path.join(tmpDirPath, "$hashName.dvi");
+
+  // actions to take
+  runLatex(fileName,workingDirectory) =>
+      Process.runSync("latex", [fileName], workingDirectory: workingDirectory);
+
+  runAddHash() =>
+      Process.runSync("dart",
+                      [path.join(dartRootPath, "tools", "addlatexhash.dart"),
+                       tmpSpecPath,
+                       hashPath]);
+
+  runDvi2tty(dviFile) =>
+      Process.runSync("dvi2tty", [dviFile], workingDirectory: tmpDir.path);
+
+  chkDvi2tty(file, subject) =>
+      checkAction(runDvi2tty(file), "dvitty on $subject failed");
+
+  // perform test
+  new File(styPath).copySync(tmpStyPath);
+  new File(specPath).copySync(tmpSpecPath);
+  for (var i = 0; i < 5; i++) {
+    checkAction(runLatex(specName, tmpDirPath), "LaTeX on spec failed");
+  }
+  checkAction(runAddHash(),"addlatexhash.dart failed");
+  for (var i = 0; i < 5; i++) {
+    checkAction(runLatex(hashFileName, tmpDirPath), "LaTeX on output failed");
+  }
+  if (chkDvi2tty(specDviPath, "spec") != chkDvi2tty(hashDviPath, "output")) {
+    throw "dvi2tty spec != dvitty output";
+  }
+}
+
+main([args]) {
+  testCutMatch();
+  testSisp();
+  // latex and dvi2tty are not installed in the standard test environment
+  if (args.length > 0 && args[0] == "local") testNoChange();
+}