Improve handling of temporary directories in SQL tests.

Initialize directory delayed in shared code and add checks to verify
that it is valid. Close attached / cloned databases to prevent locks
on files and leaking temporary directories caused by SQLite:

QTemporaryDir: Unable to remove "...\Temp\tst_qsqldatabase-P1XkOA" most likely due to the presence of read-only files.
QTemporaryDir: Unable to remove "...\Temp\tst_qsqltablemodel-P1XkOA" most likely due to the presence of read-only files.
QWARN  : tst_QSql::concurrentAccess() QTemporaryDir: Unable to remove "...\Temp\tst_qsql-l0VAKJ" most likely due to the presence of read-only files.

In Qt 4, emulate the temporary directory by maintaining
a list of files and deleting them in reverse order.

Change-Id: If85bbaed04bb1a32e427d642be332996d967f796
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
(cherry picked from qtbase/9a4beb4d36dc0c613e59aa5d88060d521462f56c)

4 files changed, 29 insertions, 3 deletions

diff --git a/tests/auto/qsql/tst_qsql.cpp b/tests/auto/qsql/tst_qsql.cpp
index 906d8b7..916d124 100644
--- a/tests/auto/qsql/tst_qsql.cpp
+++ b/tests/auto/qsql/tst_qsql.cpp
@@ -254,6 +254,7 @@ void tst_QSql::concurrentAccess()
 	QVERIFY_SQL( ndb, open() );
 
 	QCOMPARE( db.tables(), ndb.tables() );
+        ndb.close();
     }
     // no database servers installed - don't fail
     QVERIFY(1);
diff --git a/tests/auto/qsqldatabase/tst_databases.h b/tests/auto/qsqldatabase/tst_databases.h
index a688f9e..64dcb80 100644
--- a/tests/auto/qsqldatabase/tst_databases.h
+++ b/tests/auto/qsqldatabase/tst_databases.h
@@ -136,13 +136,24 @@ class tst_Databases
 {
 
 public:
-    tst_Databases(): counter( 0 )
+    tst_Databases(): counter( 0 ), m_sqLitePrefix(QDir::tempPath())
     {
+        if (!m_sqLitePrefix.endsWith(QLatin1Char('/')))
+            m_sqLitePrefix += QLatin1Char('/');
+        m_sqLitePrefix += QLatin1String("foo");
+        m_sqLitePrefix += QString::number(QDateTime::currentDateTime().toMSecsSinceEpoch() % quint64(1000));
     }
 
     ~tst_Databases()
     {
         close();
+        for (int i = m_sqLiteFiles.size() - 1; i >= 0; --i) {
+            QFile sqLiteFile(m_sqLiteFiles.at(i));
+            if (sqLiteFile.exists() && !sqLiteFile.remove()) {
+                qWarning() << "Cannot remove " << QDir::toNativeSeparators(sqLiteFile.fileName())
+                           << ':' << sqLiteFile.errorString();
+            }
+        }
     }
 
     // returns a testtable consisting of the names of all database connections if
@@ -279,7 +290,7 @@ public:
 
 //      use in-memory database to prevent local files
 //         addDb("QSQLITE", ":memory:");
-         addDb( "QSQLITE", QDir::toNativeSeparators(QDir::tempPath()+"/foo.db") );
+         addDb( "QSQLITE", QDir::toNativeSeparators(sqLiteFileName()));
 //         addDb( "QSQLITE2", QDir::toNativeSeparators(QDir::tempPath()+"/foo2.db") );
 //         addDb( "QODBC3", "DRIVER={SQL SERVER};SERVER=iceblink.nokia.troll.no\\ICEBLINK", "troll", "trond", "" );
 //         addDb( "QODBC3", "DRIVER={SQL Native Client};SERVER=silence.nokia.troll.no\\SQLEXPRESS", "troll", "trond", "" );
@@ -569,8 +580,20 @@ public:
             return QString();
     }
 
+    QString sqLiteFileName() // Return a temporary file name for SQLite DB
+    {
+        const QString newFileName = m_sqLitePrefix + QLatin1Char('_')
+            + QString::number(m_sqLiteFiles.size()) + QLatin1String(".db");
+        m_sqLiteFiles.append(newFileName);
+        return newFileName;
+    }
+
     QStringList     dbNames;
     int      counter;
+
+private:
+    QString m_sqLitePrefix;
+    QStringList m_sqLiteFiles;
 };
 
 #endif
diff --git a/tests/auto/qsqldatabase/tst_qsqldatabase.cpp b/tests/auto/qsqldatabase/tst_qsqldatabase.cpp
index bc0eb32..9bdd011 100644
--- a/tests/auto/qsqldatabase/tst_qsqldatabase.cpp
+++ b/tests/auto/qsqldatabase/tst_qsqldatabase.cpp
@@ -2538,6 +2538,7 @@ void tst_QSqlDatabase::sqlite_enable_cache_mode()
     QSqlQuery q(db), q2(db2);
     QVERIFY_SQL(q, exec("select * from "+qTableName("qtest", __FILE__)));
     QVERIFY_SQL(q2, exec("select * from "+qTableName("qtest", __FILE__)));
+    db2.close();
 }
 
 QTEST_MAIN(tst_QSqlDatabase)
diff --git a/tests/auto/qsqltablemodel/tst_qsqltablemodel.cpp b/tests/auto/qsqltablemodel/tst_qsqltablemodel.cpp
index e9bcdaa..078e109 100644
--- a/tests/auto/qsqltablemodel/tst_qsqltablemodel.cpp
+++ b/tests/auto/qsqltablemodel/tst_qsqltablemodel.cpp
@@ -1261,7 +1261,7 @@ void tst_QSqlTableModel::sqlite_attachedDatabase()
         QSKIP(":memory: database, skipping test", SkipSingle);
 
     QSqlDatabase attachedDb = QSqlDatabase::cloneDatabase(db, db.driverName() + QLatin1String("attached"));
-    attachedDb.setDatabaseName(db.databaseName()+QLatin1String("attached.dat"));
+    attachedDb.setDatabaseName(dbs.sqLiteFileName());
     QVERIFY_SQL(attachedDb, open());
     QSqlQuery q(attachedDb);
     tst_Databases::safeDropTables(attachedDb, QStringList() << "atest" << "atest2");
@@ -1297,6 +1297,7 @@ void tst_QSqlTableModel::sqlite_attachedDatabase()
     QCOMPARE(model.rowCount(), 1);
     QCOMPARE(model.data(model.index(0, 0), Qt::DisplayRole).toInt(), 3);
     QCOMPARE(model.data(model.index(0, 1), Qt::DisplayRole).toString(), QLatin1String("main"));
+    attachedDb.close();
 }