Primiano Tucci | 97440f4 | 2017-10-24 13:27:18 +0100 | [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 "protozero/scattered_stream_writer.h" |
| 18 | |
| 19 | #include <string.h> |
| 20 | |
| 21 | #include <memory> |
| 22 | |
Primiano Tucci | d7d1be0 | 2017-10-30 17:41:34 +0000 | [diff] [blame] | 23 | #include "base/logging.h" |
Primiano Tucci | 97440f4 | 2017-10-24 13:27:18 +0100 | [diff] [blame] | 24 | #include "gtest/gtest.h" |
| 25 | #include "protozero/src/test/fake_scattered_buffer.h" |
| 26 | |
| 27 | namespace protozero { |
| 28 | namespace { |
| 29 | |
| 30 | const size_t kChunkSize = 8; |
| 31 | |
| 32 | TEST(ScatteredStreamWriterTest, ScatteredWrites) { |
| 33 | FakeScatteredBuffer delegate(kChunkSize); |
| 34 | ScatteredStreamWriter ssw(&delegate); |
| 35 | |
| 36 | const uint8_t kOneByteBuf[] = {0x40}; |
| 37 | const uint8_t kThreeByteBuf[] = {0x50, 0x51, 0x52}; |
| 38 | const uint8_t kFourByteBuf[] = {0x60, 0x61, 0x62, 0x63}; |
| 39 | uint8_t kTwentyByteBuf[20]; |
| 40 | for (uint8_t i = 0; i < sizeof(kTwentyByteBuf); ++i) |
| 41 | kTwentyByteBuf[i] = 0xA0 + i; |
| 42 | |
| 43 | // Writing up to the chunk size should cause only the initial extension. |
| 44 | for (uint8_t i = 0; i < kChunkSize; ++i) { |
| 45 | ssw.WriteByte(i); |
| 46 | EXPECT_EQ(kChunkSize - i - 1, ssw.bytes_available()); |
| 47 | } |
| 48 | EXPECT_EQ(1u, delegate.chunks().size()); |
| 49 | EXPECT_EQ(0u, ssw.bytes_available()); |
| 50 | |
| 51 | // This extra write will cause the first extension. |
| 52 | ssw.WriteBytes(kOneByteBuf, sizeof(kOneByteBuf)); |
| 53 | EXPECT_EQ(2u, delegate.chunks().size()); |
| 54 | EXPECT_EQ(7u, ssw.bytes_available()); |
| 55 | |
| 56 | // This starts at offset 1, to make sure we don't hardcode any assumption |
| 57 | // about alignment. |
| 58 | ContiguousMemoryRange reserved_range_1 = ssw.ReserveBytes(4); |
| 59 | EXPECT_EQ(2u, delegate.chunks().size()); |
| 60 | EXPECT_EQ(3u, ssw.bytes_available()); |
| 61 | |
| 62 | ssw.WriteByte(0xFF); |
| 63 | ssw.WriteBytes(kThreeByteBuf, sizeof(kThreeByteBuf)); |
| 64 | EXPECT_EQ(3u, delegate.chunks().size()); |
| 65 | EXPECT_EQ(7u, ssw.bytes_available()); |
| 66 | |
| 67 | ContiguousMemoryRange reserved_range_2 = ssw.ReserveBytes(4); |
| 68 | ssw.WriteBytes(kTwentyByteBuf, sizeof(kTwentyByteBuf)); |
| 69 | EXPECT_EQ(6u, delegate.chunks().size()); |
| 70 | EXPECT_EQ(7u, ssw.bytes_available()); |
| 71 | |
| 72 | // Writing reserved bytes should not change the bytes_available(). |
| 73 | memcpy(reserved_range_1.begin, kFourByteBuf, sizeof(kFourByteBuf)); |
| 74 | memcpy(reserved_range_2.begin, kFourByteBuf, sizeof(kFourByteBuf)); |
| 75 | EXPECT_EQ(6u, delegate.chunks().size()); |
| 76 | EXPECT_EQ(7u, ssw.bytes_available()); |
| 77 | |
| 78 | // Check that reserving more bytes than what left creates a brand new chunk |
| 79 | // even if the previous one is not exhausted |
| 80 | for (uint8_t i = 0; i < 5; ++i) |
| 81 | ssw.WriteByte(0xFF); |
| 82 | memcpy(ssw.ReserveBytes(4).begin, kFourByteBuf, sizeof(kFourByteBuf)); |
| 83 | memcpy(ssw.ReserveBytesUnsafe(3), kThreeByteBuf, sizeof(kThreeByteBuf)); |
| 84 | memcpy(ssw.ReserveBytes(3).begin, kThreeByteBuf, sizeof(kThreeByteBuf)); |
| 85 | memcpy(ssw.ReserveBytesUnsafe(1), kOneByteBuf, sizeof(kOneByteBuf)); |
| 86 | memcpy(ssw.ReserveBytes(1).begin, kOneByteBuf, sizeof(kOneByteBuf)); |
| 87 | |
| 88 | EXPECT_EQ(8u, delegate.chunks().size()); |
| 89 | EXPECT_EQ(3u, ssw.bytes_available()); |
| 90 | |
| 91 | EXPECT_EQ("0001020304050607", delegate.GetChunkAsString(0)); |
| 92 | EXPECT_EQ("4060616263FF5051", delegate.GetChunkAsString(1)); |
| 93 | EXPECT_EQ("5260616263A0A1A2", delegate.GetChunkAsString(2)); |
| 94 | EXPECT_EQ("A3A4A5A6A7A8A9AA", delegate.GetChunkAsString(3)); |
| 95 | EXPECT_EQ("ABACADAEAFB0B1B2", delegate.GetChunkAsString(4)); |
| 96 | EXPECT_EQ("B3FFFFFFFFFF0000", delegate.GetChunkAsString(5)); |
| 97 | EXPECT_EQ("6061626350515200", delegate.GetChunkAsString(6)); |
| 98 | EXPECT_EQ("5051524040000000", delegate.GetChunkAsString(7)); |
| 99 | |
| 100 | // Finally reset the writer to a new buffer. |
| 101 | uint8_t other_buffer[8] = {0}; |
| 102 | ssw.Reset({other_buffer, other_buffer + sizeof(other_buffer)}); |
| 103 | EXPECT_EQ(other_buffer, ssw.write_ptr()); |
| 104 | ssw.WriteByte(1); |
| 105 | ssw.WriteBytes(kThreeByteBuf, sizeof(kThreeByteBuf)); |
| 106 | EXPECT_EQ(1u, other_buffer[0]); |
| 107 | EXPECT_EQ(0x52u, other_buffer[3]); |
| 108 | } |
| 109 | |
| 110 | } // namespace |
| 111 | } // namespace protozero |