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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <array>
#include <cstdint>
#include <gtest/gtest.h>
#include "netdutils/Slice.h"
#include "netdutils/Status.h"
#include "netdutils/StatusOr.h"
namespace android {
namespace netdutils {
class SliceTest : public testing::Test {
protected:
std::array<char, 256> mRaw = {};
};
TEST_F(SliceTest, smoke) {
Slice s1 = makeSlice(mRaw);
Slice s2 = makeSlice(mRaw);
auto p = split(s1, 14);
s2 = p.first; // avoid warn-unused error
std::stringstream ss;
ss << Slice();
EXPECT_EQ("Slice[base: 0x0, limit: 0x0, size: 0x0]", ss.str());
constexpr size_t kBytes = 14;
EXPECT_EQ(s1.base(), take(s1, kBytes).base());
EXPECT_EQ(kBytes, take(s1, kBytes).size());
EXPECT_EQ(s1.base() + kBytes, drop(s1, kBytes).base());
EXPECT_EQ(s1.size() - kBytes, drop(s1, kBytes).size());
double a = 0;
double b = 0;
int c = 0;
EXPECT_EQ(sizeof(a), extract(s1, a));
EXPECT_EQ(sizeof(a) + sizeof(b), extract(s1, a, b));
EXPECT_EQ(sizeof(a) + sizeof(b) + sizeof(c), extract(s1, a, b, c));
}
TEST_F(SliceTest, constructor) {
// Expect the following lines to compile
Slice s1 = makeSlice(mRaw);
Slice s2(s1);
Slice s3 = s2;
const Slice s4(s3);
const Slice s5 = s4;
s3 = s5;
Slice s6(mRaw.data(), mRaw.size());
Slice s7(mRaw.data(), mRaw.data() + mRaw.size());
struct {
int a;
double b;
float c;
} anon;
makeSlice(anon);
EXPECT_EQ(reinterpret_cast<uint8_t*>(mRaw.data()), s1.base());
EXPECT_EQ(reinterpret_cast<uint8_t*>(mRaw.data()) + mRaw.size(), s1.limit());
EXPECT_EQ(mRaw.size(), s1.size());
EXPECT_FALSE(mRaw.empty());
EXPECT_TRUE(Slice().empty());
EXPECT_TRUE(Slice(nullptr, static_cast<size_t>(0)).empty());
EXPECT_TRUE(Slice(nullptr, nullptr).empty());
}
TEST_F(SliceTest, extract) {
struct A {
int a, b;
bool operator==(const A& other) const { return a == other.a && b == other.b; }
};
struct B {
char str[12];
bool b;
int i;
bool operator==(const B& other) const {
return b == other.b && i == other.i && 0 == strncmp(str, other.str, 12);
}
};
A origA1 = {1, 2};
A origA2 = {3, 4};
B origB = {"hello world", true, 1234};
// Populate buffer for extracting.
Slice buffer = makeSlice(mRaw);
copy(buffer, makeSlice(origA1));
copy(drop(buffer, sizeof(origA1)), makeSlice(origB));
copy(drop(buffer, sizeof(origA1) + sizeof(origB)), makeSlice(origA2));
{
// Non-variadic extract
A a1{};
size_t len = extract(buffer, a1);
EXPECT_EQ(sizeof(A), len);
EXPECT_EQ(origA1, a1);
}
{
// Variadic extract, 2 destinations
A a1{};
B b{};
size_t len = extract(buffer, a1, b);
EXPECT_EQ(sizeof(A) + sizeof(B), len);
EXPECT_EQ(origA1, a1);
EXPECT_EQ(origB, b);
}
{
// Variadic extract, 3 destinations
A a1{}, a2{};
B b{};
size_t len = extract(buffer, a1, b, a2);
EXPECT_EQ(2 * sizeof(A) + sizeof(B), len);
EXPECT_EQ(origA1, a1);
EXPECT_EQ(origB, b);
EXPECT_EQ(origA2, a2);
}
}
} // namespace netdutils
} // namespace android
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