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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 "courgette/streams.h"
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "testing/gtest/include/gtest/gtest.h"
TEST(StreamsTest, SimpleWriteRead) {
const unsigned int kValue1 = 12345;
courgette::SinkStream sink;
EXPECT_TRUE(sink.WriteVarint32(kValue1));
const uint8_t* sink_buffer = sink.Buffer();
size_t length = sink.Length();
courgette::SourceStream source;
source.Init(sink_buffer, length);
unsigned int value;
bool can_read = source.ReadVarint32(&value);
EXPECT_TRUE(can_read);
EXPECT_EQ(kValue1, value);
EXPECT_EQ(0U, source.Remaining());
}
TEST(StreamsTest, SimpleWriteRead2) {
courgette::SinkStream sink;
EXPECT_TRUE(sink.Write("Hello", 5));
const uint8_t* sink_buffer = sink.Buffer();
size_t sink_length = sink.Length();
courgette::SourceStream source;
source.Init(sink_buffer, sink_length);
char text[10] = {0};
bool can_read = source.Read(text, 5);
EXPECT_TRUE(can_read);
EXPECT_EQ(0, memcmp("Hello", text, 5));
EXPECT_EQ(0U, source.Remaining());
}
TEST(StreamsTest, StreamSetWriteRead) {
courgette::SinkStreamSet out;
out.Init(4);
const unsigned int kValue1 = 12345;
EXPECT_TRUE(out.stream(3)->WriteVarint32(kValue1));
courgette::SinkStream collected;
EXPECT_TRUE(out.CopyTo(&collected));
const uint8_t* collected_buffer = collected.Buffer();
size_t collected_length = collected.Length();
courgette::SourceStreamSet in;
bool can_init = in.Init(collected_buffer, collected_length);
EXPECT_TRUE(can_init);
uint32_t value;
bool can_read = in.stream(3)->ReadVarint32(&value);
EXPECT_TRUE(can_read);
EXPECT_EQ(kValue1, value);
EXPECT_EQ(0U, in.stream(3)->Remaining());
EXPECT_EQ(0U, in.stream(2)->Remaining());
}
TEST(StreamsTest, StreamSetWriteRead2) {
const size_t kNumberOfStreams = 4;
const unsigned int kEnd = ~0U;
courgette::SinkStreamSet out;
out.Init(kNumberOfStreams);
static const unsigned int data[] = {
3, 123, 3, 1000, 0, 100, 2, 100, 0, 999999,
0, 0, 0, 0, 1, 2, 1, 3, 1, 5, 0, 66,
// varint32 edge case values:
1, 127, 1, 128, 1, 129, 1, 16383, 1, 16384,
kEnd
};
for (size_t i = 0; data[i] != kEnd; i += 2) {
size_t id = data[i];
size_t datum = data[i + 1];
EXPECT_TRUE(out.stream(id)->WriteVarint32(datum));
}
courgette::SinkStream collected;
EXPECT_TRUE(out.CopyTo(&collected));
courgette::SourceStreamSet in;
bool can_init = in.Init(collected.Buffer(), collected.Length());
EXPECT_TRUE(can_init);
for (size_t i = 0; data[i] != kEnd; i += 2) {
size_t id = data[i];
size_t datum = data[i + 1];
uint32_t value = 77;
bool can_read = in.stream(id)->ReadVarint32(&value);
EXPECT_TRUE(can_read);
EXPECT_EQ(datum, value);
}
for (size_t i = 0; i < kNumberOfStreams; ++i) {
EXPECT_EQ(0U, in.stream(i)->Remaining());
}
}
TEST(StreamsTest, SignedVarint32) {
courgette::SinkStream out;
static const int32_t data[] = {0, 64, 128, 8192,
16384, 1 << 20, 1 << 21, 1 << 22,
1 << 27, 1 << 28, 0x7fffffff, -0x7fffffff};
std::vector<int32_t> values;
for (size_t i = 0; i < sizeof(data)/sizeof(data[0]); ++i) {
int32_t basis = data[i];
for (int delta = -4; delta <= 4; ++delta) {
EXPECT_TRUE(out.WriteVarint32Signed(basis + delta));
values.push_back(basis + delta);
EXPECT_TRUE(out.WriteVarint32Signed(-basis + delta));
values.push_back(-basis + delta);
}
}
courgette::SourceStream in;
in.Init(out);
for (size_t i = 0; i < values.size(); ++i) {
int written_value = values[i];
int32_t datum;
bool can_read = in.ReadVarint32Signed(&datum);
EXPECT_TRUE(can_read);
EXPECT_EQ(written_value, datum);
}
EXPECT_TRUE(in.Empty());
}
TEST(StreamsTest, StreamSetReadWrite) {
courgette::SinkStreamSet out;
{ // Local scope for temporary stream sets.
courgette::SinkStreamSet subset1;
EXPECT_TRUE(subset1.stream(3)->WriteVarint32(30000));
EXPECT_TRUE(subset1.stream(5)->WriteVarint32(50000));
EXPECT_TRUE(out.WriteSet(&subset1));
courgette::SinkStreamSet subset2;
EXPECT_TRUE(subset2.stream(2)->WriteVarint32(20000));
EXPECT_TRUE(subset2.stream(6)->WriteVarint32(60000));
EXPECT_TRUE(out.WriteSet(&subset2));
}
courgette::SinkStream collected;
EXPECT_TRUE(out.CopyTo(&collected));
courgette::SourceStreamSet in;
bool can_init_in = in.Init(collected.Buffer(), collected.Length());
EXPECT_TRUE(can_init_in);
courgette::SourceStreamSet subset1;
bool can_read_1 = in.ReadSet(&subset1);
EXPECT_TRUE(can_read_1);
EXPECT_FALSE(in.Empty());
courgette::SourceStreamSet subset2;
bool can_read_2 = in.ReadSet(&subset2);
EXPECT_TRUE(can_read_2);
EXPECT_TRUE(in.Empty());
courgette::SourceStreamSet subset3;
bool can_read_3 = in.ReadSet(&subset3);
EXPECT_FALSE(can_read_3);
EXPECT_FALSE(subset1.Empty());
EXPECT_FALSE(subset1.Empty());
uint32_t datum;
EXPECT_TRUE(subset1.stream(3)->ReadVarint32(&datum));
EXPECT_EQ(30000U, datum);
EXPECT_TRUE(subset1.stream(5)->ReadVarint32(&datum));
EXPECT_EQ(50000U, datum);
EXPECT_TRUE(subset1.Empty());
EXPECT_TRUE(subset2.stream(2)->ReadVarint32(&datum));
EXPECT_EQ(20000U, datum);
EXPECT_TRUE(subset2.stream(6)->ReadVarint32(&datum));
EXPECT_EQ(60000U, datum);
EXPECT_TRUE(subset2.Empty());
}
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