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// Copyright (c) 2009 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_descriptor_shuffle.h"
#include "testing/gtest/include/gtest/gtest.h"
using base::InjectiveMultimap;
using base::InjectionArc;
using base::PerformInjectiveMultimap;
using base::InjectionDelegate;
namespace {
typedef testing::Test FileDescriptorShuffleTest;
}
// 'Duplicated' file descriptors start at this number
static const int kDuplicateBase = 1000;
struct Action {
enum Type {
CLOSE,
MOVE,
DUPLICATE,
};
Action(Type in_type, int in_fd1, int in_fd2 = -1)
: type(in_type),
fd1(in_fd1),
fd2(in_fd2) {
}
bool operator==(const Action& other) const {
return other.type == type &&
other.fd1 == fd1 &&
other.fd2 == fd2;
}
Type type;
int fd1;
int fd2;
};
class InjectionTracer : public InjectionDelegate {
public:
InjectionTracer()
: next_duplicate_(kDuplicateBase) {
}
bool Duplicate(int* result, int fd) {
*result = next_duplicate_++;
actions_.push_back(Action(Action::DUPLICATE, *result, fd));
return true;
}
bool Move(int src, int dest) {
actions_.push_back(Action(Action::MOVE, src, dest));
return true;
}
void Close(int fd) {
actions_.push_back(Action(Action::CLOSE, fd));
}
const std::vector<Action>& actions() const { return actions_; }
private:
int next_duplicate_;
std::vector<Action> actions_;
};
TEST(FileDescriptorShuffleTest, Empty) {
InjectiveMultimap map;
InjectionTracer tracer;
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
EXPECT_EQ(0u, tracer.actions().size());
}
TEST(FileDescriptorShuffleTest, Noop) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 0, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
EXPECT_EQ(0u, tracer.actions().size());
}
TEST(FileDescriptorShuffleTest, NoopAndClose) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 0, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
EXPECT_EQ(0u, tracer.actions().size());
}
TEST(FileDescriptorShuffleTest, Simple1) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(1u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
}
TEST(FileDescriptorShuffleTest, Simple2) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, false));
map.push_back(InjectionArc(2, 3, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(2u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 2, 3));
}
TEST(FileDescriptorShuffleTest, Simple3) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(2u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::CLOSE, 0));
}
TEST(FileDescriptorShuffleTest, Simple4) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(10, 0, true));
map.push_back(InjectionArc(1, 1, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(2u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 10, 0));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::CLOSE, 10));
}
TEST(FileDescriptorShuffleTest, Cycle) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, false));
map.push_back(InjectionArc(1, 0, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(4u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] ==
Action(Action::DUPLICATE, kDuplicateBase, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::MOVE, kDuplicateBase, 0));
EXPECT_TRUE(tracer.actions()[3] == Action(Action::CLOSE, kDuplicateBase));
}
TEST(FileDescriptorShuffleTest, CycleAndClose1) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, true));
map.push_back(InjectionArc(1, 0, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(4u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] ==
Action(Action::DUPLICATE, kDuplicateBase, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::MOVE, kDuplicateBase, 0));
EXPECT_TRUE(tracer.actions()[3] == Action(Action::CLOSE, kDuplicateBase));
}
TEST(FileDescriptorShuffleTest, CycleAndClose2) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, false));
map.push_back(InjectionArc(1, 0, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(4u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] ==
Action(Action::DUPLICATE, kDuplicateBase, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::MOVE, kDuplicateBase, 0));
EXPECT_TRUE(tracer.actions()[3] == Action(Action::CLOSE, kDuplicateBase));
}
TEST(FileDescriptorShuffleTest, CycleAndClose3) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, true));
map.push_back(InjectionArc(1, 0, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(4u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] ==
Action(Action::DUPLICATE, kDuplicateBase, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::MOVE, kDuplicateBase, 0));
EXPECT_TRUE(tracer.actions()[3] == Action(Action::CLOSE, kDuplicateBase));
}
TEST(FileDescriptorShuffleTest, Fanout) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, false));
map.push_back(InjectionArc(0, 2, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(2u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 2));
}
TEST(FileDescriptorShuffleTest, FanoutAndClose1) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, true));
map.push_back(InjectionArc(0, 2, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(3u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 2));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::CLOSE, 0));
}
TEST(FileDescriptorShuffleTest, FanoutAndClose2) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, false));
map.push_back(InjectionArc(0, 2, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(3u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 2));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::CLOSE, 0));
}
TEST(FileDescriptorShuffleTest, FanoutAndClose3) {
InjectiveMultimap map;
InjectionTracer tracer;
map.push_back(InjectionArc(0, 1, true));
map.push_back(InjectionArc(0, 2, true));
EXPECT_TRUE(PerformInjectiveMultimap(map, &tracer));
ASSERT_EQ(3u, tracer.actions().size());
EXPECT_TRUE(tracer.actions()[0] == Action(Action::MOVE, 0, 1));
EXPECT_TRUE(tracer.actions()[1] == Action(Action::MOVE, 0, 2));
EXPECT_TRUE(tracer.actions()[2] == Action(Action::CLOSE, 0));
}
class FailingDelegate : public InjectionDelegate {
public:
bool Duplicate(int* result, int fd) {
return false;
}
bool Move(int src, int dest) {
return false;
}
void Close(int fd) {
}
};
TEST(FileDescriptorShuffleTest, EmptyWithFailure) {
InjectiveMultimap map;
FailingDelegate failing;
EXPECT_TRUE(PerformInjectiveMultimap(map, &failing));
}
TEST(FileDescriptorShuffleTest, NoopWithFailure) {
InjectiveMultimap map;
FailingDelegate failing;
map.push_back(InjectionArc(0, 0, false));
EXPECT_TRUE(PerformInjectiveMultimap(map, &failing));
}
TEST(FileDescriptorShuffleTest, Simple1WithFailure) {
InjectiveMultimap map;
FailingDelegate failing;
map.push_back(InjectionArc(0, 1, false));
EXPECT_FALSE(PerformInjectiveMultimap(map, &failing));
}
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