88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "io/FileInputStream.h"
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#include "android-base/macros.h"
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#include "android-base/test_utils.h"
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#include "test/Test.h"
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using ::android::StringPiece;
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using ::testing::Eq;
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using ::testing::NotNull;
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using ::testing::StrEq;
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namespace aapt {
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namespace io {
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TEST(FileInputStreamTest, NextAndBackup) {
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std::string input = "this is a cool string";
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TemporaryFile file;
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ASSERT_THAT(TEMP_FAILURE_RETRY(write(file.fd, input.c_str(), input.size())), Eq(21));
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lseek64(file.fd, 0, SEEK_SET);
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// Use a small buffer size so that we can call Next() a few times.
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FileInputStream in(file.fd, 10u);
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ASSERT_FALSE(in.HadError());
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EXPECT_THAT(in.ByteCount(), Eq(0u));
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const char* buffer;
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size_t size;
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ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size)) << in.GetError();
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ASSERT_THAT(size, Eq(10u));
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ASSERT_THAT(buffer, NotNull());
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EXPECT_THAT(in.ByteCount(), Eq(10u));
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EXPECT_THAT(StringPiece(buffer, size), Eq("this is a "));
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ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size));
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ASSERT_THAT(size, Eq(10u));
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ASSERT_THAT(buffer, NotNull());
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EXPECT_THAT(in.ByteCount(), Eq(20u));
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EXPECT_THAT(StringPiece(buffer, size), Eq("cool strin"));
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in.BackUp(5u);
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EXPECT_THAT(in.ByteCount(), Eq(15u));
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ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size));
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ASSERT_THAT(size, Eq(5u));
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ASSERT_THAT(buffer, NotNull());
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ASSERT_THAT(in.ByteCount(), Eq(20u));
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EXPECT_THAT(StringPiece(buffer, size), Eq("strin"));
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// Backup 1 more than possible. Should clamp.
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in.BackUp(11u);
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EXPECT_THAT(in.ByteCount(), Eq(10u));
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ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size));
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ASSERT_THAT(size, Eq(10u));
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ASSERT_THAT(buffer, NotNull());
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ASSERT_THAT(in.ByteCount(), Eq(20u));
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EXPECT_THAT(StringPiece(buffer, size), Eq("cool strin"));
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ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size));
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ASSERT_THAT(size, Eq(1u));
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ASSERT_THAT(buffer, NotNull());
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ASSERT_THAT(in.ByteCount(), Eq(21u));
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EXPECT_THAT(StringPiece(buffer, size), Eq("g"));
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EXPECT_FALSE(in.Next(reinterpret_cast<const void**>(&buffer), &size));
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EXPECT_FALSE(in.HadError());
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}
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} // namespace io
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} // namespace aapt
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