third_party/WebKit/LayoutTests/storage/websql/read-and-write-transactions-dont-run-together.js

   1 function terminateTest()
   2 {
   3     if (window.testRunner)
   4         testRunner.notifyDone();
   5 }
   6
   7 function openTestDatabase()
   8 {
   9     return openDatabaseWithSuffix("ReadAndWriteTransactionsDontRunTogetherTest",
  10                                   "1.0",
  11                                   "Test to make sure that read and write transactions on different DB handles to the same DB don't run at the same time.",
  12                                   32768);
  13 }
  14
  15 var readTransactionsInProgress = 0;
  16 var writeTransactionsInProgress = 0;
  17 var totalTransactions = 0;
  18 var finishedTransactions = 0;
  19
  20 function runTransaction(db, readOnly)
  21 {
  22     var transactionFunction = (readOnly ? db.readTransaction : db.transaction);
  23     transactionFunction.call(db, function(tx) {
  24             if (readOnly) {
  25                 if (writeTransactionsInProgress != 0) {
  26                     log("Read transaction starting while write transaction in progress.");
  27                     terminateTest();
  28                 }
  29                 readTransactionsInProgress++;
  30             } else {
  31                 if ((readTransactionsInProgress != 0) || (writeTransactionsInProgress != 0)) {
  32                     log("Write transaction starting while another transaction in progress.");
  33                     terminateTest();
  34                 }
  35                 writeTransactionsInProgress++;
  36             }
  37             tx.executeSql("SELECT * FROM Test;");
  38         }, function(error) {
  39             log((readOnly ? "Read" : "Write") + " transaction failed: " + error.message);
  40             terminateTest();
  41         }, function() {
  42              finishedTransactions++;
  43              if (readOnly)
  44                  readTransactionsInProgress--;
  45              else
  46                  writeTransactionsInProgress--;
  47              log("Transaction successful.");
  48              if ((finishedTransactions == totalTransactions) && (readTransactionsInProgress == 0) && (writeTransactionsInProgress == 0))
  49                  terminateTest();
  50         });
  51 }
  52
  53 function runReadAndWriteTransactions(db1, db2, db3)
  54 {
  55     totalTransactions = 10;
  56     finishedTransactions = 0;
  57     runTransaction(db1, true);
  58     runTransaction(db2, true);
  59     runTransaction(db1, false);
  60     runTransaction(db1, true);
  61     runTransaction(db2, true);
  62     runTransaction(db3, true);
  63     runTransaction(db1, false);
  64     runTransaction(db2, false);
  65     runTransaction(db1, true);
  66     runTransaction(db3, true);
  67 }
  68
  69 function runTest() {
  70     var db1 = openTestDatabase();
  71     var db2 = openTestDatabase();
  72     var db3 = openTestDatabase();
  73     db1.transaction(function(tx) {
  74             tx.executeSql("CREATE TABLE IF NOT EXISTS Test (Foo int);");
  75         }, function(error) {
  76             log("Cannot create the Test table: " + error.message);
  77             terminateTest();
  78         }, function() {
  79             runReadAndWriteTransactions(db1, db2, db3);
  80         });
  81 }