Adam Lesinski | efeb7af | 2017-08-02 14:57:43 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "io/FileInputStream.h" |
| 18 | |
| 19 | #include "android-base/macros.h" |
| 20 | #include "android-base/test_utils.h" |
| 21 | |
| 22 | #include "test/Test.h" |
| 23 | |
| 24 | using ::android::StringPiece; |
| 25 | using ::testing::Eq; |
| 26 | using ::testing::NotNull; |
| 27 | using ::testing::StrEq; |
| 28 | |
| 29 | namespace aapt { |
| 30 | namespace io { |
| 31 | |
| 32 | TEST(FileInputStreamTest, NextAndBackup) { |
| 33 | std::string input = "this is a cool string"; |
| 34 | TemporaryFile file; |
| 35 | ASSERT_THAT(TEMP_FAILURE_RETRY(write(file.fd, input.c_str(), input.size())), Eq(21)); |
| 36 | lseek64(file.fd, 0, SEEK_SET); |
| 37 | |
| 38 | // Use a small buffer size so that we can call Next() a few times. |
| 39 | FileInputStream in(file.fd, 10u); |
| 40 | ASSERT_FALSE(in.HadError()); |
| 41 | EXPECT_THAT(in.ByteCount(), Eq(0u)); |
| 42 | |
| 43 | const char* buffer; |
| 44 | size_t size; |
| 45 | ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size)) << in.GetError(); |
| 46 | ASSERT_THAT(size, Eq(10u)); |
| 47 | ASSERT_THAT(buffer, NotNull()); |
| 48 | EXPECT_THAT(in.ByteCount(), Eq(10u)); |
| 49 | EXPECT_THAT(StringPiece(buffer, size), Eq("this is a ")); |
| 50 | |
| 51 | ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size)); |
| 52 | ASSERT_THAT(size, Eq(10u)); |
| 53 | ASSERT_THAT(buffer, NotNull()); |
| 54 | EXPECT_THAT(in.ByteCount(), Eq(20u)); |
| 55 | EXPECT_THAT(StringPiece(buffer, size), Eq("cool strin")); |
| 56 | |
| 57 | in.BackUp(5u); |
| 58 | EXPECT_THAT(in.ByteCount(), Eq(15u)); |
| 59 | |
| 60 | ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size)); |
| 61 | ASSERT_THAT(size, Eq(5u)); |
| 62 | ASSERT_THAT(buffer, NotNull()); |
| 63 | ASSERT_THAT(in.ByteCount(), Eq(20u)); |
| 64 | EXPECT_THAT(StringPiece(buffer, size), Eq("strin")); |
| 65 | |
| 66 | // Backup 1 more than possible. Should clamp. |
| 67 | in.BackUp(11u); |
| 68 | EXPECT_THAT(in.ByteCount(), Eq(10u)); |
| 69 | |
| 70 | ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size)); |
| 71 | ASSERT_THAT(size, Eq(10u)); |
| 72 | ASSERT_THAT(buffer, NotNull()); |
| 73 | ASSERT_THAT(in.ByteCount(), Eq(20u)); |
| 74 | EXPECT_THAT(StringPiece(buffer, size), Eq("cool strin")); |
| 75 | |
| 76 | ASSERT_TRUE(in.Next(reinterpret_cast<const void**>(&buffer), &size)); |
| 77 | ASSERT_THAT(size, Eq(1u)); |
| 78 | ASSERT_THAT(buffer, NotNull()); |
| 79 | ASSERT_THAT(in.ByteCount(), Eq(21u)); |
| 80 | EXPECT_THAT(StringPiece(buffer, size), Eq("g")); |
| 81 | |
| 82 | EXPECT_FALSE(in.Next(reinterpret_cast<const void**>(&buffer), &size)); |
| 83 | EXPECT_FALSE(in.HadError()); |
| 84 | } |
| 85 | |
| 86 | } // namespace io |
| 87 | } // namespace aapt |