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// Copyright 2014 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 "mojo/edk/system/channel_endpoint_id.h"
#include <sstream>
#include "testing/gtest/include/gtest/gtest.h"
namespace mojo {
namespace system {
namespace {
TEST(ChannelEndpointIdTest, Basic) {
ChannelEndpointId invalid;
ChannelEndpointId bootstrap(ChannelEndpointId::GetBootstrap());
EXPECT_EQ(invalid, invalid);
EXPECT_EQ(bootstrap, bootstrap);
EXPECT_FALSE(invalid == bootstrap);
EXPECT_FALSE(invalid != invalid);
EXPECT_FALSE(bootstrap != bootstrap);
EXPECT_NE(invalid, bootstrap);
EXPECT_FALSE(invalid < invalid);
EXPECT_LT(invalid, bootstrap);
EXPECT_FALSE(invalid.is_valid());
EXPECT_TRUE(bootstrap.is_valid());
EXPECT_FALSE(invalid.is_remote());
EXPECT_FALSE(bootstrap.is_remote());
// Test assignment.
ChannelEndpointId copy;
copy = bootstrap;
EXPECT_EQ(copy, bootstrap);
copy = invalid;
EXPECT_EQ(copy, invalid);
}
// Tests values of invalid and bootstrap IDs. (This tests implementation
// details.)
TEST(ChannelEndpointIdTest, Value) {
EXPECT_EQ(0u, ChannelEndpointId().value());
EXPECT_EQ(1u, ChannelEndpointId::GetBootstrap().value());
}
// Tests ostream output. (This tests implementation details.)
TEST(ChannelEndpointIdTest, Ostream) {
{
std::ostringstream stream;
stream << ChannelEndpointId();
EXPECT_EQ("0", stream.str());
}
{
std::ostringstream stream;
stream << ChannelEndpointId::GetBootstrap();
EXPECT_EQ("1", stream.str());
}
}
TEST(LocalChannelEndpointIdGeneratorTest, Basic) {
LocalChannelEndpointIdGenerator gen;
ChannelEndpointId id1;
EXPECT_FALSE(id1.is_valid()); // Check sanity.
id1 = gen.GetNext();
EXPECT_TRUE(id1.is_valid());
EXPECT_FALSE(id1.is_remote());
EXPECT_EQ(ChannelEndpointId::GetBootstrap().value(), id1.value());
ChannelEndpointId id2 = gen.GetNext();
EXPECT_TRUE(id2.is_valid());
EXPECT_FALSE(id2.is_remote());
// Technically, nonequality here is an implementation detail, since, e.g.,
// random generation of IDs would be a valid implementation.
EXPECT_NE(id2, id1);
// ... but right now we just increment to generate IDs.
EXPECT_EQ(2u, id2.value());
}
// Note: LocalChannelEndpointIdGeneratorTest.WrapAround is defined further
// below, outside the anonymous namespace.
TEST(RemoteChannelEndpointIdGeneratorTest, Basic) {
RemoteChannelEndpointIdGenerator gen;
ChannelEndpointId id1;
EXPECT_FALSE(id1.is_valid()); // Check sanity.
id1 = gen.GetNext();
EXPECT_TRUE(id1.is_valid());
EXPECT_TRUE(id1.is_remote());
// This tests an implementation detail.
EXPECT_EQ(ChannelEndpointId::kRemoteFlag, id1.value());
ChannelEndpointId id2 = gen.GetNext();
EXPECT_TRUE(id2.is_valid());
EXPECT_TRUE(id2.is_remote());
// Technically, nonequality here is an implementation detail, since, e.g.,
// random generation of IDs would be a valid implementation.
EXPECT_NE(id2, id1);
// ... but right now we just increment to generate IDs.
EXPECT_EQ(ChannelEndpointId::kRemoteFlag + 1, id2.value());
}
// Note: RemoteChannelEndpointIdGeneratorTest.WrapAround is defined further
// below, outside the anonymous namespace.
} // namespace
// Tests that |LocalChannelEndpointIdGenerator| handles wrap-around correctly.
// (This tests implementation details.) This test isn't in an anonymous
// namespace, since it needs to be friended.
TEST(LocalChannelEndpointIdGeneratorTest, WrapAround) {
LocalChannelEndpointIdGenerator gen;
gen.next_ = ChannelEndpointId(ChannelEndpointId::kRemoteFlag - 1);
ChannelEndpointId id = gen.GetNext();
EXPECT_TRUE(id.is_valid());
EXPECT_FALSE(id.is_remote());
EXPECT_EQ(ChannelEndpointId::kRemoteFlag - 1, id.value());
id = gen.GetNext();
EXPECT_TRUE(id.is_valid());
EXPECT_FALSE(id.is_remote());
EXPECT_EQ(1u, id.value());
}
// Tests that |RemoteChannelEndpointIdGenerator| handles wrap-around correctly.
// (This tests implementation details.) This test isn't in an anonymous
// namespace, since it needs to be friended.
TEST(RemoteChannelEndpointIdGeneratorTest, WrapAround) {
RemoteChannelEndpointIdGenerator gen;
gen.next_ = ChannelEndpointId(~0u);
ChannelEndpointId id = gen.GetNext();
EXPECT_TRUE(id.is_valid());
EXPECT_TRUE(id.is_remote());
EXPECT_EQ(~0u, id.value());
id = gen.GetNext();
EXPECT_TRUE(id.is_valid());
EXPECT_TRUE(id.is_remote());
EXPECT_EQ(ChannelEndpointId::kRemoteFlag, id.value());
}
} // namespace system
} // namespace mojo
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