Working insertion of hash values; added a few labels in 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
index 98f1ba52be528e5aff4420054da4f03526ccfceb..286563e63fb9dc64530f1ece59d63f79f5f6f5a2 100644
--- a/tests/standalone/io/addlatexhash_test.dart
+++ b/tests/standalone/io/addlatexhash_test.dart
@@ -54,11 +54,64 @@ testSisp() {
   oneTestSisp(sispIsDartEnd, "End", "whatever else ..", false);
 }
 
+// Check that the hash values of paragraphs in the specially prepared
+// LaTeX source 'addlatexhash_test_src.tex' are identical in groups
+// of eight (so we get 8 identical hash values, then another hash 
+// value 8 times, etc.)
+testSameHash() {
+  // set up /tmp directory to hold output
+  final tmpDir = Directory.systemTemp.createTempSync("addlatexhash_test");
+  final tmpDirPath = tmpDir.path;
+
+  // file names/paths for file containing groups of 8 variants of a paragraph
+  const par8timesName = "addlatexhash_test_src";
+  const par8timesFileName = "$par8timesName.tex";
+  final par8timesDirPath = path.join(dartRootDir, "tests", "standalone", "io");
+  final par8timesPath = path.join(par8timesDirPath, par8timesFileName);
+  final tmpPar8timesPath = path.join(tmpDirPath, par8timesFileName);
+
+  // file names paths for output
+  final hashName = par8timesName + "-hash";
+  final hashFileName = "$hashName.tex";
+  final hashPath = path.join(tmpDirPath, hashFileName);
+  final listName = par8timesName + "-list";
+  final listFileName = "$listName.txt";
+  final listPath = path.join(tmpDirPath, listFileName);
+
+  // actions to take
+  runAddHash() =>
+      Process.runSync("dart",
+                      [path.join(dartRootPath, "tools", "addlatexhash.dart"),
+                       tmpPar8timesPath,
+                       hashPath,
+                       listPath]);
+
+  // perform test
+  new File(par8timesPath).copySync(tmpPar8timesPath);
+  checkAction(runAddHash(), "addlatexhash.dart failed");
+  var listFile = new File(listPath);
+  var listLines = listFile.readAsLinesSync();
+  var latestLine = null;
+  var sameCount = 0;
+  for (var line in listLines) {
+    if (!line.startsWith("  ")) continue; // section marker
+    if (line.startsWith("  %")) continue; // transformed text "comment"
+    if (line != latestLine) {
+      // new hash, check for number of equal hashes, then reset
+      if (sameCount % 8 == 0) {
+        // saw zero or more blocks of 8 identical hash values: OK
+        latestLine = line;
+        sameCount = 1;
+      } else throw "normalization failed to produce same result";
+    } else sameCount++;
+  }
+}
+
 // Check that the LaTeX source transformation done by addlatexhash.dart
 // does not affect the generated output, as seen via dvi2tty and diff.
 // NB: Not part of normal testing (only local): latex and dvi2tty are
 // not installed in the standard test environment.
-testNoChange() {
+testSameDVI() {
   // set up /tmp directory to hold output
   final tmpDir = Directory.systemTemp.createTempSync("addlatexhash_test");
   final tmpDirPath = tmpDir.path;
@@ -83,6 +136,10 @@ testNoChange() {
   final hashPath = path.join(tmpDirPath, hashFileName);
   final hashDviPath = path.join(tmpDirPath, "$hashName.dvi");
 
+  final listName = specName + "-list";
+  final listFileName = "$listName.txt";
+  final listPath = path.join(tmpDirPath, listFileName);
+
   // actions to take
   runLatex(fileName,workingDirectory) =>
       Process.runSync("latex", [fileName], workingDirectory: workingDirectory);
@@ -91,7 +148,8 @@ testNoChange() {
       Process.runSync("dart",
                       [path.join(dartRootPath, "tools", "addlatexhash.dart"),
                        tmpSpecPath,
-                       hashPath]);
+                       hashPath,
+                       listPath]);
 
   runDvi2tty(dviFile) =>
       Process.runSync("dvi2tty", [dviFile], workingDirectory: tmpDir.path);
@@ -100,23 +158,28 @@ testNoChange() {
       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";
-  }
+  var tmpStyFile = new File(styPath).copySync(tmpStyPath);
+  var tmpStySink = tmpStyFile.openWrite(mode: FileMode.APPEND);
+  tmpStySink.writeln(r"\renewcommand{\LMHash}[1]{\OriginalLMHash{xxxx}}");
+  tmpStySink.close().then((_) {
+    new File(specPath).copySync(tmpSpecPath);
+    checkAction(runAddHash(),"addlatexhash.dart failed");
+    for (var i = 0; i < 5; i++) {
+      checkAction(runLatex(specName, tmpDirPath), "LaTeX on spec 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();
+  testSameHash();
   // latex and dvi2tty are not installed in the standard test environment
-  if (args.length > 0 && args[0] == "local") testNoChange();
+  if (args.length > 0 && args[0] == "local") testSameDVI();
 }