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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/Checked.h>
#include <AK/Span.h>
#include <AK/StdLibExtras.h>
#include <string.h>
TEST_CASE(constexpr_default_constructor_is_empty)
{
constexpr Span<int> span;
static_assert(span.is_empty(), "Default constructed span should be empty.");
}
TEST_CASE(implicit_conversion_to_const)
{
constexpr Bytes bytes0;
[[maybe_unused]] constexpr ReadonlyBytes bytes2 = bytes0;
[[maybe_unused]] constexpr ReadonlyBytes bytes3 = static_cast<ReadonlyBytes>(bytes2);
}
TEST_CASE(span_works_with_constant_types)
{
static constexpr u8 buffer[4] { 1, 2, 3, 4 };
constexpr ReadonlyBytes bytes { buffer, 4 };
static_assert(IsConst<RemoveReference<decltype(bytes[1])>>);
static_assert(bytes[2] == 3);
}
TEST_CASE(span_works_with_mutable_types)
{
u8 buffer[4] { 1, 2, 3, 4 };
Bytes bytes { buffer, 4 };
EXPECT_EQ(bytes[2], 3);
++bytes[2];
EXPECT_EQ(bytes[2], 4);
}
TEST_CASE(iterator_behaves_like_loop)
{
u8 buffer[256];
for (int idx = 0; idx < 256; ++idx) {
buffer[idx] = static_cast<u8>(idx);
}
Bytes bytes { buffer, 256 };
size_t idx = 0;
for (auto iter = bytes.begin(); iter < bytes.end(); ++iter) {
EXPECT_EQ(*iter, buffer[idx]);
++idx;
}
}
TEST_CASE(modifying_is_possible)
{
int values_before[8] = { 1, 2, 3, 4, 5, 6, 7, 8 };
int values_after[8] = { 7, 6, 5, 4, 3, 2, 1, 0 };
Span<int> span { values_before, 8 };
for (auto& value : span) {
value = 8 - value;
}
for (int idx = 0; idx < 8; ++idx) {
EXPECT_EQ(values_before[idx], values_after[idx]);
}
}
TEST_CASE(at_and_index_operator_return_same_value)
{
u8 buffer[256];
for (int idx = 0; idx < 256; ++idx) {
buffer[idx] = static_cast<u8>(idx);
}
Bytes bytes { buffer, 256 };
for (int idx = 0; idx < 256; ++idx) {
EXPECT_EQ(buffer[idx], bytes[idx]);
EXPECT_EQ(bytes[idx], bytes.at(idx));
}
}
TEST_CASE(can_subspan_whole_span)
{
static constexpr u8 buffer[16] {};
constexpr ReadonlyBytes bytes { buffer, 16 };
constexpr auto slice = bytes.slice(0, 16);
static_assert(slice.data() == buffer);
static_assert(slice.size() == 16u);
}
TEST_CASE(can_subspan_as_intended)
{
static constexpr u16 buffer[8] { 1, 2, 3, 4, 5, 6, 7, 8 };
constexpr Span<const u16> span { buffer, 8 };
constexpr auto slice = span.slice(3, 2);
static_assert(slice.size() == 2u);
static_assert(slice[0] == 4);
static_assert(slice[1] == 5);
}
TEST_CASE(span_from_void_pointer)
{
int value = 0;
[[maybe_unused]] Bytes bytes0 { reinterpret_cast<void*>(value), 4 };
[[maybe_unused]] ReadonlyBytes bytes1 { reinterpret_cast<const void*>(value), 4 };
}
TEST_CASE(span_from_c_string)
{
const char* str = "Serenity";
[[maybe_unused]] ReadonlyBytes bytes { str, strlen(str) };
}
TEST_CASE(starts_with)
{
const char* str = "HeyFriends!";
ReadonlyBytes bytes { str, strlen(str) };
const char* str_hey = "Hey";
ReadonlyBytes hey_bytes { str_hey, strlen(str_hey) };
EXPECT(bytes.starts_with(hey_bytes));
const char* str_nah = "Nah";
ReadonlyBytes nah_bytes { str_nah, strlen(str_nah) };
EXPECT(!bytes.starts_with(nah_bytes));
const u8 hey_array[3] = { 'H', 'e', 'y' };
ReadonlyBytes hey_bytes_u8 { hey_array, 3 };
EXPECT(bytes.starts_with(hey_bytes_u8));
}
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