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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/unowned_user_data/scoped_unowned_user_data.h"
#include "chrome/browser/ui/unowned_user_data/unowned_user_data_host.h"
#include "chrome/browser/ui/unowned_user_data/unowned_user_data_interface.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class TestScopedUnownedUserData {
public:
static const char* kDataKey;
explicit TestScopedUnownedUserData(UnownedUserDataHost& host)
: scoped_data_holder_(host, this) {}
~TestScopedUnownedUserData() = default;
static TestScopedUnownedUserData* Get(UnownedUserDataHost& host) {
return ScopedUnownedUserData<TestScopedUnownedUserData>::Get(host);
}
private:
ScopedUnownedUserData<TestScopedUnownedUserData> scoped_data_holder_;
};
const char* TestScopedUnownedUserData::kDataKey = "TestScopedUnownedUserData";
class TestUnownedUserDataSubclass
: public UnownedUserDataInterface<TestUnownedUserDataSubclass> {
public:
static const char* kDataKey;
explicit TestUnownedUserDataSubclass(UnownedUserDataHost& host)
: UnownedUserDataInterface(host, this) {}
~TestUnownedUserDataSubclass() override = default;
};
const char* TestUnownedUserDataSubclass::kDataKey =
"TestUnownedUserDataSubclass";
} // namespace
// Tests basic functionality of a class with a ScopedUnownedUserData member.
TEST(UnownedUserDataTest, ScopedUnownedUserData) {
UnownedUserDataHost host;
EXPECT_EQ(nullptr, TestScopedUnownedUserData::Get(host));
{
TestScopedUnownedUserData test_data(host);
EXPECT_EQ(&test_data, TestScopedUnownedUserData::Get(host));
}
EXPECT_EQ(nullptr, TestScopedUnownedUserData::Get(host));
}
// Tests basic functionality of a class inheriting from
// UnownedUserDataInterface.
TEST(UnownedUserDataTest, UnownedUserDataInterface) {
UnownedUserDataHost host;
EXPECT_EQ(nullptr, TestUnownedUserDataSubclass::Get(host));
{
TestUnownedUserDataSubclass test_data(host);
EXPECT_EQ(&test_data, TestUnownedUserDataSubclass::Get(host));
}
EXPECT_EQ(nullptr, TestUnownedUserDataSubclass::Get(host));
}
// Tests that different types of UnownedUserData are independent of one another
// and can be individually set and unset.
TEST(UnownedUserDataTest, DifferentTypesAreIndependent) {
// We use the two types of TestUnownedUserDataSubclass and
// TestScopedUnownedUserData. These could be thought of as "UnownedUserData1"
// and "UnownedUserData2".
UnownedUserDataHost host;
// At the start, neither type has an associated entry on the host.
EXPECT_EQ(nullptr, TestUnownedUserDataSubclass::Get(host));
EXPECT_EQ(nullptr, TestScopedUnownedUserData::Get(host));
// Create an entry for TestUnownedUserDataSubclass.
std::optional<TestUnownedUserDataSubclass> test_data1;
test_data1.emplace(host);
// TestUnownedUserDataSubclass should have an associated entry, but
// TestScopedUnownedUserData should not.
EXPECT_EQ(&test_data1.value(), TestUnownedUserDataSubclass::Get(host));
EXPECT_EQ(nullptr, TestScopedUnownedUserData::Get(host));
// Now, create an entry for TestScopedUnownedUserData.
std::optional<TestScopedUnownedUserData> test_data2;
test_data2.emplace(host);
// Both types should have entries.
EXPECT_EQ(&test_data1.value(), TestUnownedUserDataSubclass::Get(host));
EXPECT_EQ(&test_data2.value(), TestScopedUnownedUserData::Get(host));
// Unset TestUnownedUserDataSubclass. TestScopedUnownedUserData's entry should
// be unaffected.
test_data1.reset();
EXPECT_EQ(nullptr, TestUnownedUserDataSubclass::Get(host));
EXPECT_EQ(&test_data2.value(), TestScopedUnownedUserData::Get(host));
// Reset TestScopedUnownedUserData. Both types should now be unset.
test_data2.reset();
EXPECT_EQ(nullptr, TestUnownedUserDataSubclass::Get(host));
EXPECT_EQ(nullptr, TestScopedUnownedUserData::Get(host));
}
// Tests that only one instance of a given type can be set on a host.
TEST(UnownedUserDataTest, CannotSetATypeTwiceOnTheSameHost) {
UnownedUserDataHost host;
std::optional<TestScopedUnownedUserData> test_data1;
std::optional<TestScopedUnownedUserData> test_data2;
// Construct one test data. This should succeed.
test_data1.emplace(host);
// Constructing another data of the same type should cause a CHECK failure.
EXPECT_DEATH(test_data2.emplace(host), "");
}
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