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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/file_util.h"
#include "base/scoped_temp_dir.h"
#include "sql/connection.h"
#include "sql/statement.h"
#include "sql/transaction.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/sqlite/sqlite3.h"
class SQLTransactionTest : public testing::Test {
public:
SQLTransactionTest() {}
void SetUp() {
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
ASSERT_TRUE(db_.Open(
temp_dir_.path().AppendASCII("SQLTransactionTest.db")));
ASSERT_TRUE(db().Execute("CREATE TABLE foo (a, b)"));
}
void TearDown() {
db_.Close();
}
sql::Connection& db() { return db_; }
// Returns the number of rows in table "foo".
int CountFoo() {
sql::Statement count(db().GetUniqueStatement("SELECT count(*) FROM foo"));
count.Step();
return count.ColumnInt(0);
}
private:
ScopedTempDir temp_dir_;
sql::Connection db_;
};
TEST_F(SQLTransactionTest, Commit) {
{
sql::Transaction t(&db());
EXPECT_FALSE(t.is_open());
EXPECT_TRUE(t.Begin());
EXPECT_TRUE(t.is_open());
EXPECT_TRUE(db().Execute("INSERT INTO foo (a, b) VALUES (1, 2)"));
t.Commit();
EXPECT_FALSE(t.is_open());
}
EXPECT_EQ(1, CountFoo());
}
TEST_F(SQLTransactionTest, Rollback) {
// Test some basic initialization, and that rollback runs when you exit the
// scope.
{
sql::Transaction t(&db());
EXPECT_FALSE(t.is_open());
EXPECT_TRUE(t.Begin());
EXPECT_TRUE(t.is_open());
EXPECT_TRUE(db().Execute("INSERT INTO foo (a, b) VALUES (1, 2)"));
}
// Nothing should have been committed since it was implicitly rolled back.
EXPECT_EQ(0, CountFoo());
// Test explicit rollback.
sql::Transaction t2(&db());
EXPECT_FALSE(t2.is_open());
EXPECT_TRUE(t2.Begin());
EXPECT_TRUE(db().Execute("INSERT INTO foo (a, b) VALUES (1, 2)"));
t2.Rollback();
EXPECT_FALSE(t2.is_open());
// Nothing should have been committed since it was explicitly rolled back.
EXPECT_EQ(0, CountFoo());
}
// Rolling back any part of a transaction should roll back all of them.
TEST_F(SQLTransactionTest, NestedRollback) {
EXPECT_EQ(0, db().transaction_nesting());
// Outermost transaction.
{
sql::Transaction outer(&db());
EXPECT_TRUE(outer.Begin());
EXPECT_EQ(1, db().transaction_nesting());
// The first inner one gets committed.
{
sql::Transaction inner1(&db());
EXPECT_TRUE(inner1.Begin());
EXPECT_TRUE(db().Execute("INSERT INTO foo (a, b) VALUES (1, 2)"));
EXPECT_EQ(2, db().transaction_nesting());
inner1.Commit();
EXPECT_EQ(1, db().transaction_nesting());
}
// One row should have gotten inserted.
EXPECT_EQ(1, CountFoo());
// The second inner one gets rolled back.
{
sql::Transaction inner2(&db());
EXPECT_TRUE(inner2.Begin());
EXPECT_TRUE(db().Execute("INSERT INTO foo (a, b) VALUES (1, 2)"));
EXPECT_EQ(2, db().transaction_nesting());
inner2.Rollback();
EXPECT_EQ(1, db().transaction_nesting());
}
// A third inner one will fail in Begin since one has already been rolled
// back.
EXPECT_EQ(1, db().transaction_nesting());
{
sql::Transaction inner3(&db());
EXPECT_FALSE(inner3.Begin());
EXPECT_EQ(1, db().transaction_nesting());
}
}
EXPECT_EQ(0, db().transaction_nesting());
EXPECT_EQ(0, CountFoo());
}
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