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// Copyright 2020 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <array>
#include "gtest/gtest.h"
#include "dawn/common/TypedInteger.h"
#include "dawn/common/ityp_span.h"
namespace dawn {
namespace {
class ITypSpanTest : public testing::Test {
protected:
using Key = TypedInteger<struct KeyT, size_t>;
using Val = TypedInteger<struct ValT, uint32_t>;
using Span = ityp::span<Key, Val>;
};
// Test that values can be set at an index and retrieved from the same index.
TEST_F(ITypSpanTest, Indexing) {
std::array<Val, 10> arr;
Span span(arr.data(), Key(arr.size()));
{
span[Key(2)] = Val(5);
span[Key(1)] = Val(9);
span[Key(9)] = Val(2);
ASSERT_EQ(span[Key(2)], Val(5));
ASSERT_EQ(span[Key(1)], Val(9));
ASSERT_EQ(span[Key(9)], Val(2));
}
}
// Test that the span can be is iterated in order with a range-based for loop
TEST_F(ITypSpanTest, RangeBasedIteration) {
std::array<Val, 10> arr;
Span span(arr.data(), Key(arr.size()));
// Assign in a non-const range-based for loop
uint32_t i = 0;
for (Val& val : span) {
val = Val(i);
}
// Check values in a const range-based for loop
i = 0;
for (Val val : static_cast<const Span&>(span)) {
ASSERT_EQ(val, span[Key(i++)]);
}
}
// Test that begin/end/front/back/data return pointers/references to the correct elements.
TEST_F(ITypSpanTest, BeginEndFrontBackData) {
std::array<Val, 10> arr;
Span span(arr.data(), Key(arr.size()));
// non-const versions
ASSERT_EQ(span.begin(), &span[Key(0)]);
ASSERT_EQ(span.end(), &span[Key(0)] + static_cast<size_t>(span.size()));
ASSERT_EQ(&span.front(), &span[Key(0)]);
ASSERT_EQ(&span.back(), &span[Key(9)]);
ASSERT_EQ(span.data(), &span[Key(0)]);
// const versions
const Span& constSpan = span;
ASSERT_EQ(constSpan.begin(), &constSpan[Key(0)]);
ASSERT_EQ(constSpan.end(), &constSpan[Key(0)] + static_cast<size_t>(constSpan.size()));
ASSERT_EQ(&constSpan.front(), &constSpan[Key(0)]);
ASSERT_EQ(&constSpan.back(), &constSpan[Key(9)]);
ASSERT_EQ(constSpan.data(), &constSpan[Key(0)]);
}
// Test the utility SpanFromUntyped
TEST_F(ITypSpanTest, SpanFromUntyped) {
// Test creating an empty span.
{
Val* values = nullptr;
Span span = ityp::SpanFromUntyped<Key>(values, 0);
ASSERT_EQ(nullptr, span.data());
ASSERT_EQ(Key(0), span.size());
}
// Test creating a one element span.
{
Val value = Val(25);
Span span = ityp::SpanFromUntyped<Key>(&value, 1);
ASSERT_EQ(&value, span.data());
ASSERT_EQ(Key(1), span.size());
ASSERT_EQ(value, span[Key(0)]);
}
// Test creating a multi-element span.
{
std::array<Val, 10> arr = {};
Span span = ityp::SpanFromUntyped<Key>(arr.data(), arr.size());
ASSERT_EQ(arr.data(), span.data());
ASSERT_EQ(arr.size(), static_cast<size_t>(span.size()));
}
}
} // anonymous namespace
} // namespace dawn