blob: ac65d76c2be31a547f5b922004bf76f4d9b48c0c [file] [log] [blame]
// Copyright 2019 The Fuchsia 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 <block-client/cpp/block-group-registry.h>
#include <thread>
#include <zxtest/zxtest.h>
namespace block_client {
namespace {
TEST(BlockGroupRegistryTest, AssignOneGroupID) {
BlockGroupRegistry registry;
EXPECT_EQ(0, registry.GroupID());
EXPECT_EQ(0, registry.GroupID());
}
TEST(BlockGroupRegistryTest, AssignMultipleGroups) {
BlockGroupRegistry registry;
// Ensure primary calling thread has an assigned group first.
ASSERT_EQ(0, registry.GroupID());
std::thread background_thread([&registry]() { EXPECT_EQ(1, registry.GroupID()); });
// Although the background group is different, the current thread's
// group should remain the same.
EXPECT_EQ(0, registry.GroupID());
background_thread.join();
EXPECT_EQ(0, registry.GroupID());
}
TEST(BlockGroupRegistryTest, GroupsResetWithNewRegistry) {
// Setup:
// - Calling thread has groupID = 0.
// - Background thread has groupID = 1.
{
BlockGroupRegistry registry;
ASSERT_EQ(0, registry.GroupID());
std::thread background_thread([&registry]() { EXPECT_EQ(1, registry.GroupID()); });
background_thread.join();
}
ASSERT_NO_FAILURES();
// With a new instance of the registry, observe we can change the group ID of the
// calling thread.
{
BlockGroupRegistry registry;
std::thread background_thread([&registry]() { EXPECT_EQ(0, registry.GroupID()); });
background_thread.join();
ASSERT_EQ(1, registry.GroupID());
}
}
} // namespace
} // namespace block_client