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// Copyright 2023 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 <vector>
#include "dawn/common/Compiler.h"
#include "dawn/common/Enumerator.h"
#include "dawn/common/ityp_array.h"
#include "dawn/common/ityp_span.h"
#include "dawn/common/ityp_vector.h"
#include "gtest/gtest.h"
namespace dawn {
namespace {
class EnumeratorTest : public testing::Test {
protected:
template <typename Index, typename Thing, typename Value>
void Check(Thing thingToEnumerate, const Value* values) {
size_t i = 0;
for (auto [index, value] : Enumerate(thingToEnumerate)) {
ASSERT_EQ(index, Index(i));
ASSERT_EQ(value, values[i]);
i++;
}
}
template <typename Thing>
void CheckEmpty(Thing thingToEnumerate) {
for ([[maybe_unused]] auto [index, value] : Enumerate(thingToEnumerate)) {
FAIL();
}
}
using Int = TypedInteger<struct IntT, size_t>;
};
// Test that Enumerate works with std::array
TEST_F(EnumeratorTest, StdArray) {
// Empty array
std::array<uint32_t, 0> emptyThing{};
CheckEmpty(emptyThing);
// Non-empty array
std::array<uint32_t, 3> thing = {37, 45, 67};
Check<size_t>(thing, thing.data());
}
// Test that Enumerate works with std::vector
TEST_F(EnumeratorTest, StdVector) {
// Empty vector
std::vector<uint32_t> emptyThing;
CheckEmpty(emptyThing);
// Non-empty vector
std::vector<uint32_t> thing = {{37, 45, 67}};
Check<size_t>(thing, thing.data());
}
// Test that Enumerate works with ityp::array
TEST_F(EnumeratorTest, ITypArray) {
// Empty array
ityp::array<Int, uint32_t, 0> emptyThing;
CheckEmpty(emptyThing);
// Non-empty array
ityp::array<Int, uint32_t, 3> thing = {37u, 45u, 67u};
Check<Int>(thing, thing.data());
}
// Test that Enumerate works with ityp::span
TEST_F(EnumeratorTest, ITypSpan) {
// Empty span
ityp::span<Int, uint32_t> emptyThing;
CheckEmpty(emptyThing);
// Empty span for a non-null pointer.
uint32_t whatever = 923847;
auto emptyThingWithGarbagePointer = ityp::SpanFromUntyped<Int>(&whatever, 0);
CheckEmpty(emptyThingWithGarbagePointer);
// Non-empty span
std::array<uint32_t, 3> backingArray = {{37, 45, 67}};
auto thing = ityp::SpanFromUntyped<Int>(backingArray.data(), 3);
Check<Int>(thing, thing.data());
}
// Test that Enumerate works with ityp::vector
TEST_F(EnumeratorTest, ITypVector) {
// Empty vector
ityp::vector<Int, uint32_t> emptyThing;
CheckEmpty(emptyThing);
// Non-empty vector
ityp::vector<Int, uint32_t> thing = {{37, 45, 67}};
Check<Int>(thing, thing.data());
}
// Test that Enumerate(const container) will give const reference to the values.
TEST_F(EnumeratorTest, ConstContainer) {
// Non-empty array
const ityp::array<Int, uint32_t, 3> values = {37u, 45u, 67u};
for (auto [i, value] : Enumerate(values)) {
static_assert(std::is_same_v<decltype(value), const uint32_t&>);
}
}
} // anonymous namespace
} // namespace dawn