Sqlite: Add update hook and use it to get the last changed id

Sqlite has a function to get the last inserted rowid but very often you
want to get the updated rowid too.

Change-Id: Ie276a5039682813ad16597433996a2959f54d9ba
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

tests/unit/unittest/lastchangedrowid-test.cpp

@@ -0,0 +1,108 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "googletest.h"
+
+#include "mocksqlitedatabase.h"
+
+#include <lastchangedrowid.h>
+
+namespace {
+
+class LastChangedRowId : public testing::Test
+{
+protected:
+    NiceMock<MockSqliteDatabase> mockSqliteDatabase;
+    Sqlite::LastChangedRowId lastRowId{mockSqliteDatabase, "main", "foo"};
+};
+
+TEST_F(LastChangedRowId, SetUpdateHookInContructor)
+{
+    EXPECT_CALL(mockSqliteDatabase, setUpdateHook(_));
+
+    Sqlite::LastChangedRowId lastRowId{mockSqliteDatabase, "main", "foo"};
+}
+
+TEST_F(LastChangedRowId, ResetUpdateHookInDestructor)
+{
+    EXPECT_CALL(mockSqliteDatabase, resetUpdateHook());
+}
+
+TEST_F(LastChangedRowId, GetMinusOneAsRowIdIfNoCallbackWasCalled)
+{
+    ASSERT_THAT(lastRowId.lastRowId, -1);
+}
+
+TEST_F(LastChangedRowId, CallbackSetsLastRowId)
+{
+    lastRowId.callback(Sqlite::ChangeType::Update, "main", "foo", 42);
+
+    ASSERT_THAT(lastRowId.lastRowId, 42);
+}
+
+TEST_F(LastChangedRowId, CallbackChecksDatabaseName)
+{
+    lastRowId.callback(Sqlite::ChangeType::Update, "temp", "foo", 42);
+
+    ASSERT_THAT(lastRowId.lastRowId, -1);
+}
+
+TEST_F(LastChangedRowId, CallbackChecksTableName)
+{
+    lastRowId.callback(Sqlite::ChangeType::Update, "main", "bar", 42);
+
+    ASSERT_THAT(lastRowId.lastRowId, -1);
+}
+
+TEST_F(LastChangedRowId, LastCallSetsRowId)
+{
+    lastRowId.callback(Sqlite::ChangeType::Update, "main", "foo", 42);
+    lastRowId.callback(Sqlite::ChangeType::Insert, "main", "foo", 33);
+
+    lastRowId.callback(Sqlite::ChangeType::Delete, "main", "foo", 66);
+
+    ASSERT_THAT(lastRowId.lastRowId, 66);
+}
+
+TEST_F(LastChangedRowId, TakeLastRowId)
+{
+    lastRowId.callback(Sqlite::ChangeType::Update, "main", "foo", 42);
+
+    auto id = lastRowId.takeLastRowId();
+
+    ASSERT_THAT(id, 42);
+}
+
+TEST_F(LastChangedRowId, TakeLastRowIdResetsRowIdToMinusOne)
+{
+    lastRowId.callback(Sqlite::ChangeType::Update, "main", "foo", 42);
+    lastRowId.takeLastRowId();
+
+    auto id = lastRowId.takeLastRowId();
+
+    ASSERT_THAT(id, -1);
+}
+
+} // namespace