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https://github.com/SerenityOS/serenity
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507a5d8a07
This is to avoid UB in cases where we need to be able to read from the buffer immediately after resizing it.
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <AK/ByteBuffer.h>
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#include <AK/Vector.h>
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TEST_CASE(equality_operator)
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{
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ByteBuffer a = ByteBuffer::copy("Hello, world", 7).release_value();
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ByteBuffer b = ByteBuffer::copy("Hello, friend", 7).release_value();
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// `a` and `b` are both "Hello, ".
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ByteBuffer c = ByteBuffer::copy("asdf", 4).release_value();
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ByteBuffer d;
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EXPECT_EQ(a == a, true);
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EXPECT_EQ(a == b, true);
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EXPECT_EQ(a == c, false);
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EXPECT_EQ(a == d, false);
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EXPECT_EQ(b == a, true);
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EXPECT_EQ(b == b, true);
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EXPECT_EQ(b == c, false);
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EXPECT_EQ(b == d, false);
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EXPECT_EQ(c == a, false);
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EXPECT_EQ(c == b, false);
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EXPECT_EQ(c == c, true);
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EXPECT_EQ(c == d, false);
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EXPECT_EQ(d == a, false);
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EXPECT_EQ(d == b, false);
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EXPECT_EQ(d == c, false);
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EXPECT_EQ(d == d, true);
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}
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TEST_CASE(byte_buffer_vector_contains_slow_bytes)
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{
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Vector<ByteBuffer> vector;
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ByteBuffer a = ByteBuffer::copy("Hello, friend", 13).release_value();
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vector.append(a);
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ReadonlyBytes b = "Hello, friend"sv.bytes();
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Bytes c = a.bytes();
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EXPECT_EQ(vector.contains_slow(b), true);
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EXPECT_EQ(vector.contains_slow(c), true);
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}
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TEST_CASE(zero_fill_new_elements_on_growth)
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{
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auto buffer = MUST(ByteBuffer::create_uninitialized(5));
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buffer.span().fill(1);
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EXPECT_EQ(buffer.span(), (Array<u8, 5> { 1, 1, 1, 1, 1 }));
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buffer.resize(8, ByteBuffer::ZeroFillNewElements::Yes);
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EXPECT_EQ(buffer.span(), (Array<u8, 8> { 1, 1, 1, 1, 1, 0, 0, 0 }));
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buffer.span().fill(2);
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EXPECT_EQ(buffer.span(), (Array<u8, 8> { 2, 2, 2, 2, 2, 2, 2, 2 }));
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buffer.resize(10, ByteBuffer::ZeroFillNewElements::Yes);
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EXPECT_EQ(buffer.span(), (Array<u8, 10> { 2, 2, 2, 2, 2, 2, 2, 2, 0, 0 }));
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}
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BENCHMARK_CASE(append)
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{
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ByteBuffer bb;
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for (size_t i = 0; i < 1000000; ++i) {
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bb.append(static_cast<u8>(i));
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}
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}
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/*
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* FIXME: These `negative_*` tests should cause precisely one compilation error
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* each, and always for the specified reason. Currently we do not have a harness
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* for that, so in order to run the test you need to set the #define to 1, compile
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* it, and check the error messages manually.
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*/
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#define COMPILE_NEGATIVE_TESTS 0
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#if COMPILE_NEGATIVE_TESTS
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TEST_CASE(negative_operator_lt)
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{
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ByteBuffer a = ByteBuffer::copy("Hello, world", 10).release_value();
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ByteBuffer b = ByteBuffer::copy("Hello, friend", 10).release_value();
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[[maybe_unused]] auto res = a < b;
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// error: error: use of deleted function ‘bool AK::ByteBuffer::operator<(const AK::ByteBuffer&) const’
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}
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#endif /* COMPILE_NEGATIVE_TESTS */
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