mirror of
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141 lines
3.4 KiB
C++
141 lines
3.4 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/Checked.h>
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#include <AK/Span.h>
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#include <AK/StdLibExtras.h>
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#include <string.h>
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TEST_CASE(constexpr_default_constructor_is_empty)
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{
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constexpr Span<int> span;
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static_assert(span.is_empty(), "Default constructed span should be empty.");
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}
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TEST_CASE(implicit_converson_to_const)
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{
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constexpr Bytes bytes0;
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[[maybe_unused]] constexpr ReadonlyBytes bytes2 = bytes0;
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[[maybe_unused]] constexpr ReadonlyBytes bytes3 = static_cast<ReadonlyBytes>(bytes2);
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}
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TEST_CASE(span_works_with_constant_types)
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{
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static constexpr u8 buffer[4] { 1, 2, 3, 4 };
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constexpr ReadonlyBytes bytes { buffer, 4 };
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static_assert(IsConst<RemoveReference<decltype(bytes[1])>>);
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static_assert(bytes[2] == 3);
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}
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TEST_CASE(span_works_with_mutable_types)
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{
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u8 buffer[4] { 1, 2, 3, 4 };
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Bytes bytes { buffer, 4 };
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EXPECT_EQ(bytes[2], 3);
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++bytes[2];
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EXPECT_EQ(bytes[2], 4);
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}
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TEST_CASE(iterator_behaves_like_loop)
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{
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u8 buffer[256];
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for (int idx = 0; idx < 256; ++idx) {
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buffer[idx] = static_cast<u8>(idx);
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}
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Bytes bytes { buffer, 256 };
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size_t idx = 0;
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for (auto iter = bytes.begin(); iter < bytes.end(); ++iter) {
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EXPECT_EQ(*iter, buffer[idx]);
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++idx;
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}
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}
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TEST_CASE(modifying_is_possible)
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{
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int values_before[8] = { 1, 2, 3, 4, 5, 6, 7, 8 };
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int values_after[8] = { 7, 6, 5, 4, 3, 2, 1, 0 };
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Span<int> span { values_before, 8 };
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for (auto& value : span) {
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value = 8 - value;
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}
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for (int idx = 0; idx < 8; ++idx) {
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EXPECT_EQ(values_before[idx], values_after[idx]);
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}
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}
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TEST_CASE(at_and_index_operator_return_same_value)
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{
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u8 buffer[256];
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for (int idx = 0; idx < 256; ++idx) {
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buffer[idx] = static_cast<u8>(idx);
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}
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Bytes bytes { buffer, 256 };
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for (int idx = 0; idx < 256; ++idx) {
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EXPECT_EQ(buffer[idx], bytes[idx]);
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EXPECT_EQ(bytes[idx], bytes.at(idx));
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}
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}
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TEST_CASE(can_subspan_whole_span)
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{
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static constexpr u8 buffer[16] {};
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constexpr ReadonlyBytes bytes { buffer, 16 };
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constexpr auto slice = bytes.slice(0, 16);
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static_assert(slice.data() == buffer);
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static_assert(slice.size() == 16u);
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}
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TEST_CASE(can_subspan_as_intended)
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{
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static constexpr u16 buffer[8] { 1, 2, 3, 4, 5, 6, 7, 8 };
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constexpr Span<const u16> span { buffer, 8 };
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constexpr auto slice = span.slice(3, 2);
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static_assert(slice.size() == 2u);
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static_assert(slice[0] == 4);
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static_assert(slice[1] == 5);
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}
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TEST_CASE(span_from_void_pointer)
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{
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int value = 0;
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[[maybe_unused]] Bytes bytes0 { reinterpret_cast<void*>(value), 4 };
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[[maybe_unused]] ReadonlyBytes bytes1 { reinterpret_cast<const void*>(value), 4 };
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}
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TEST_CASE(span_from_c_string)
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{
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const char* str = "Serenity";
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[[maybe_unused]] ReadonlyBytes bytes { str, strlen(str) };
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}
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TEST_CASE(starts_with)
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{
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const char* str = "HeyFriends!";
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ReadonlyBytes bytes { str, strlen(str) };
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const char* str_hey = "Hey";
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ReadonlyBytes hey_bytes { str_hey, strlen(str_hey) };
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EXPECT(bytes.starts_with(hey_bytes));
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const char* str_nah = "Nah";
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ReadonlyBytes nah_bytes { str_nah, strlen(str_nah) };
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EXPECT(!bytes.starts_with(nah_bytes));
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const u8 hey_array[3] = { 'H', 'e', 'y' };
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ReadonlyBytes hey_bytes_u8 { hey_array, 3 };
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EXPECT(bytes.starts_with(hey_bytes_u8));
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}
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