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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/CircularDuplexStream.h>
TEST_CASE(works_like_a_queue)
{
constexpr size_t capacity = 32;
CircularQueue<u8, capacity> queue;
CircularDuplexStream<capacity> stream;
for (size_t idx = 0; idx < capacity; ++idx) {
queue.enqueue(static_cast<u8>(idx % 256));
stream << static_cast<u8>(idx % 256);
}
for (size_t idx = 0; idx < capacity; ++idx) {
u8 byte = 0;
stream >> byte;
EXPECT_EQ(queue.dequeue(), byte);
}
EXPECT(stream.eof());
}
TEST_CASE(overwritting_is_well_defined)
{
constexpr size_t half_capacity = 16;
constexpr size_t capacity = 2 * half_capacity;
CircularDuplexStream<capacity> stream;
for (size_t idx = 0; idx < capacity; ++idx)
stream << static_cast<u8>(idx % 256);
Array<u8, half_capacity> buffer;
stream >> buffer;
for (size_t idx = 0; idx < half_capacity; ++idx)
EXPECT_EQ(buffer[idx], idx % 256);
for (size_t idx = 0; idx < half_capacity; ++idx)
stream << static_cast<u8>(idx % 256);
for (size_t idx = 0; idx < capacity; ++idx) {
u8 byte = 0;
stream >> byte;
if (idx < half_capacity)
EXPECT_EQ(byte, half_capacity + idx % 256);
else
EXPECT_EQ(byte, idx % 256 - half_capacity);
}
EXPECT(stream.eof());
}
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