Adds unit test for task: 180617

Tests to see if QSqlQueryModel inserts extra empty gridlines into a view
for a specific SQL query statement that should return no data.

1 files changed, 41 insertions, 4 deletions

diff --git a/tests/auto/qsqlquerymodel/tst_qsqlquerymodel.cpp b/tests/auto/qsqlquerymodel/tst_qsqlquerymodel.cpp
index 88b5770572..051764ea56 100644
--- a/tests/auto/qsqlquerymodel/tst_qsqlquerymodel.cpp
+++ b/tests/auto/qsqlquerymodel/tst_qsqlquerymodel.cpp
@@ -94,6 +94,9 @@ private slots:
     void setQueryWithNoRowsInResultSet_data() { generic_data(); }
     void setQueryWithNoRowsInResultSet();
 
+    void task_180617();
+    void task_180617_data() { generic_data(); }
+
 private:
     void generic_data(const QString &engine=QString());
     void dropTestTables(QSqlDatabase db);
@@ -496,7 +499,7 @@ void tst_QSqlQueryModel::withSortFilterProxyModel()
     QSignalSpy modelRowsInsertedSpy(&model, SIGNAL(rowsInserted(const QModelIndex &, int, int)));
     model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test3"), db));
     view.scrollToBottom();
-    
+
     QTestEventLoop::instance().enterLoop(1);
 
     QCOMPARE(proxy.rowCount(), 511);
@@ -530,12 +533,12 @@ void tst_QSqlQueryModel::setQuerySignalEmission()
     QSignalSpy modelRowsRemovedSpy(&model, SIGNAL(rowsRemoved(const QModelIndex &, int, int)));
 
     // First select, the model was empty and no rows had to be removed!
-    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test"), db)); 
+    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test"), db));
     QCOMPARE(modelRowsAboutToBeRemovedSpy.count(), 0);
     QCOMPARE(modelRowsRemovedSpy.count(), 0);
 
     // Second select, the model wasn't empty and two rows had to be removed!
-    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test"), db)); 
+    model.setQuery(QSqlQuery("SELECT * FROM " + qTableName("test"), db));
     QCOMPARE(modelRowsAboutToBeRemovedSpy.count(), 1);
     QCOMPARE(modelRowsAboutToBeRemovedSpy.value(0).value(1).toInt(), 0);
     QCOMPARE(modelRowsAboutToBeRemovedSpy.value(0).value(2).toInt(), 1);
@@ -559,10 +562,44 @@ void tst_QSqlQueryModel::setQueryWithNoRowsInResultSet()
     // The query's result set will be empty so no signals should be emitted!
     QSqlQuery query(db);
     QVERIFY_SQL(query, exec("SELECT * FROM " + qTableName("test") + " where 0 = 1"));
-    model.setQuery(query); 
+    model.setQuery(query);
     QCOMPARE(modelRowsAboutToBeInsertedSpy.count(), 0);
     QCOMPARE(modelRowsInsertedSpy.count(), 0);
 }
 
+// For task 180617
+// According to the task, several specific duplicate SQL queries would cause
+// multiple empty grid lines to be visible in the view
+void tst_QSqlQueryModel::task_180617()
+{
+    QFETCH(QString, dbName);
+    QSqlDatabase db = QSqlDatabase::database(dbName);
+    CHECK_DATABASE(db);
+
+    QTableView view;
+    QCOMPARE(view.columnAt(0), -1);
+    QCOMPARE(view.rowAt(0), -1);
+
+    QSqlQueryModel model;
+    model.setQuery( "SELECT TOP 0 * FROM " + qTableName("test3"), db );
+    view.setModel(&model);
+
+    bool error = false;
+    // Usually a syntax error
+    if (model.lastError().isValid())    // usually a syntax error
+        error = true;
+
+    QCOMPARE(view.columnAt(0), (error)?-1:0 );
+    QCOMPARE(view.rowAt(0), -1);
+
+    model.setQuery( "SELECT TOP 0 * FROM " + qTableName("test3"), db );
+    model.setQuery( "SELECT TOP 0 * FROM " + qTableName("test3"), db );
+    model.setQuery( "SELECT TOP 0 * FROM " + qTableName("test3"), db );
+    model.setQuery( "SELECT TOP 0 * FROM " + qTableName("test3"), db );
+
+    QCOMPARE(view.columnAt(0),  (error)?-1:0 );
+    QCOMPARE(view.rowAt(0), -1);
+}
+
 QTEST_MAIN(tst_QSqlQueryModel)
 #include "tst_qsqlquerymodel.moc"