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2aebfb596e2f2f83f103ce3c852498fa9efb92ef
test2/source/blender/blenlib/tests/BLI_span_test.cc
Campbell Barton e955c94ed3 License Headers: Set copyright to "Blender Authors", add AUTHORS 
Listing the "Blender Foundation" as copyright holder implied the Blender
Foundation holds copyright to files which may include work from many
developers.

While keeping copyright on headers makes sense for isolated libraries,
Blender's own code may be refactored or moved between files in a way
that makes the per file copyright holders less meaningful.

Copyright references to the "Blender Foundation" have been replaced with
"Blender Authors", with the exception of `./extern/` since these this
contains libraries which are more isolated, any changed to license
headers there can be handled on a case-by-case basis.

Some directories in `./intern/` have also been excluded:

- `./intern/cycles/` it's own `AUTHORS` file is planned.
- `./intern/opensubdiv/`.

An "AUTHORS" file has been added, using the chromium projects authors
file as a template.

Design task: #110784

Ref !110783.
2023-08-16 00:20:26 +10:00

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/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: Apache-2.0 */
#include "BLI_span.hh"
#include "BLI_strict_flags.h"
#include "BLI_vector.hh"
#include "testing/testing.h"
namespace blender::tests {
TEST(span, FromSmallVector)
{
Vector<int> a = {1, 2, 3};
Span<int> a_span = a;
EXPECT_EQ(a_span.size(), 3);
EXPECT_EQ(a_span[0], 1);
EXPECT_EQ(a_span[1], 2);
EXPECT_EQ(a_span[2], 3);
}
TEST(span, AddConstToPointer)
{
int a = 0;
std::vector<int *> vec = {&a};
Span<int *> span = vec;
Span<const int *> const_span = span;
EXPECT_EQ(const_span.size(), 1);
}
TEST(span, IsReferencing)
{
int array[] = {3, 5, 8};
MutableSpan<int> span(array, ARRAY_SIZE(array));
EXPECT_EQ(span.size(), 3);
EXPECT_EQ(span[1], 5);
array[1] = 10;
EXPECT_EQ(span[1], 10);
}
TEST(span, DropBack)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).drop_back(2);
EXPECT_EQ(slice.size(), 2);
EXPECT_EQ(slice[0], 4);
EXPECT_EQ(slice[1], 5);
}
TEST(span, DropBackAll)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).drop_back(a.size());
EXPECT_EQ(slice.size(), 0);
}
TEST(span, DropFront)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).drop_front(1);
EXPECT_EQ(slice.size(), 3);
EXPECT_EQ(slice[0], 5);
EXPECT_EQ(slice[1], 6);
EXPECT_EQ(slice[2], 7);
}
TEST(span, DropFrontLargeN)
{
Vector<int> a = {1, 2, 3, 4, 5};
Span<int> slice1 = Span<int>(a).drop_front(100);
MutableSpan<int> slice2 = MutableSpan<int>(a).drop_front(100);
EXPECT_TRUE(slice1.is_empty());
EXPECT_TRUE(slice2.is_empty());
}
TEST(span, DropFrontAll)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).drop_front(a.size());
EXPECT_EQ(slice.size(), 0);
}
TEST(span, TakeFront)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).take_front(2);
EXPECT_EQ(slice.size(), 2);
EXPECT_EQ(slice[0], 4);
EXPECT_EQ(slice[1], 5);
}
TEST(span, TakeFrontLargeN)
{
Vector<int> a = {4, 5, 6, 7};
Span<int> slice1 = Span<int>(a).take_front(100);
MutableSpan<int> slice2 = MutableSpan<int>(a).take_front(100);
EXPECT_EQ(slice1.size(), 4);
EXPECT_EQ(slice2.size(), 4);
}
TEST(span, TakeBack)
{
Vector<int> a = {5, 6, 7, 8};
auto slice = Span<int>(a).take_back(2);
EXPECT_EQ(slice.size(), 2);
EXPECT_EQ(slice[0], 7);
EXPECT_EQ(slice[1], 8);
}
TEST(span, TakeBackLargeN)
{
Vector<int> a = {3, 4, 5, 6};
Span<int> slice1 = Span<int>(a).take_back(100);
MutableSpan<int> slice2 = MutableSpan<int>(a).take_back(100);
EXPECT_EQ(slice1.size(), 4);
EXPECT_EQ(slice2.size(), 4);
}
TEST(span, Slice)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).slice(1, 2);
EXPECT_EQ(slice.size(), 2);
EXPECT_EQ(slice[0], 5);
EXPECT_EQ(slice[1], 6);
}
TEST(span, SliceEmpty)
{
Vector<int> a = {4, 5, 6, 7};
auto slice = Span<int>(a).slice(2, 0);
EXPECT_EQ(slice.size(), 0);
}
TEST(span, SliceRange)
{
Vector<int> a = {1, 2, 3, 4, 5};
auto slice = Span<int>(a).slice(IndexRange(2, 2));
EXPECT_EQ(slice.size(), 2);
EXPECT_EQ(slice[0], 3);
EXPECT_EQ(slice[1], 4);
}
TEST(span, SliceLargeN)
{
Vector<int> a = {1, 2, 3, 4, 5};
Span<int> slice1 = Span<int>(a).slice_safe(3, 100);
MutableSpan<int> slice2 = MutableSpan<int>(a).slice_safe(3, 100);
EXPECT_EQ(slice1.size(), 2);
EXPECT_EQ(slice2.size(), 2);
EXPECT_EQ(slice1[0], 4);
EXPECT_EQ(slice2[0], 4);
EXPECT_EQ(slice1[1], 5);
EXPECT_EQ(slice2[1], 5);
}
TEST(span, Contains)
{
Vector<int> a = {4, 5, 6, 7};
Span<int> a_span = a;
EXPECT_TRUE(a_span.contains(4));
EXPECT_TRUE(a_span.contains(5));
EXPECT_TRUE(a_span.contains(6));
EXPECT_TRUE(a_span.contains(7));
EXPECT_FALSE(a_span.contains(3));
EXPECT_FALSE(a_span.contains(8));
}
TEST(span, Count)
{
Vector<int> a = {2, 3, 4, 3, 3, 2, 2, 2, 2};
Span<int> a_span = a;
EXPECT_EQ(a_span.count(1), 0);
EXPECT_EQ(a_span.count(2), 5);
EXPECT_EQ(a_span.count(3), 3);
EXPECT_EQ(a_span.count(4), 1);
EXPECT_EQ(a_span.count(5), 0);
}
static void test_ref_from_initializer_list(Span<int> span)
{
EXPECT_EQ(span.size(), 4);
EXPECT_EQ(span[0], 3);
EXPECT_EQ(span[1], 6);
EXPECT_EQ(span[2], 8);
EXPECT_EQ(span[3], 9);
}
TEST(span, FromInitializerList)
{
test_ref_from_initializer_list({3, 6, 8, 9});
}
TEST(span, FromVector)
{
std::vector<int> a = {1, 2, 3, 4};
Span<int> a_span(a);
EXPECT_EQ(a_span.size(), 4);
EXPECT_EQ(a_span[0], 1);
EXPECT_EQ(a_span[1], 2);
EXPECT_EQ(a_span[2], 3);
EXPECT_EQ(a_span[3], 4);
}
TEST(span, FromArray)
{
std::array<int, 2> a = {5, 6};
Span<int> a_span(a);
EXPECT_EQ(a_span.size(), 2);
EXPECT_EQ(a_span[0], 5);
EXPECT_EQ(a_span[1], 6);
}
TEST(span, Fill)
{
std::array<int, 5> a = {4, 5, 6, 7, 8};
MutableSpan<int> a_span(a);
a_span.fill(1);
EXPECT_EQ(a[0], 1);
EXPECT_EQ(a[1], 1);
EXPECT_EQ(a[2], 1);
EXPECT_EQ(a[3], 1);
EXPECT_EQ(a[4], 1);
}
TEST(span, FillIndices)
{
std::array<int, 5> a = {0, 0, 0, 0, 0};
MutableSpan<int> a_span(a);
a_span.fill_indices(Span({0, 2, 3}), 1);
EXPECT_EQ(a[0], 1);
EXPECT_EQ(a[1], 0);
EXPECT_EQ(a[2], 1);
EXPECT_EQ(a[3], 1);
EXPECT_EQ(a[4], 0);
}
TEST(span, SizeInBytes)
{
std::array<int, 10> a{};
Span<int> a_span(a);
EXPECT_EQ(a_span.size_in_bytes(), int64_t(sizeof(a)));
EXPECT_EQ(a_span.size_in_bytes(), 40);
}
TEST(span, FirstLast)
{
std::array<int, 4> a = {6, 7, 8, 9};
Span<int> a_span(a);
EXPECT_EQ(a_span.first(), 6);
EXPECT_EQ(a_span.last(), 9);
EXPECT_EQ(a_span.last(1), 8);
EXPECT_EQ(a_span.last(2), 7);
}
TEST(span, FirstLast_OneElement)
{
int a = 3;
Span<int> a_span(&a, 1);
EXPECT_EQ(a_span.first(), 3);
EXPECT_EQ(a_span.last(), 3);
EXPECT_EQ(a_span.last(0), 3);
}
TEST(span, Get)
{
std::array<int, 3> a = {5, 6, 7};
Span<int> a_span(a);
EXPECT_EQ(a_span.get(0, 42), 5);
EXPECT_EQ(a_span.get(1, 42), 6);
EXPECT_EQ(a_span.get(2, 42), 7);
EXPECT_EQ(a_span.get(3, 42), 42);
EXPECT_EQ(a_span.get(4, 42), 42);
}
TEST(span, ContainsPtr)
{
std::array<int, 3> a = {5, 6, 7};
int other = 10;
Span<int> a_span(a);
EXPECT_TRUE(a_span.contains_ptr(&a[0] + 0));
EXPECT_TRUE(a_span.contains_ptr(&a[0] + 1));
EXPECT_TRUE(a_span.contains_ptr(&a[0] + 2));
EXPECT_FALSE(a_span.contains_ptr(&a[0] + 3));
int *ptr_before = reinterpret_cast<int *>(uintptr_t(a.data()) - 1);
EXPECT_FALSE(a_span.contains_ptr(ptr_before));
EXPECT_FALSE(a_span.contains_ptr(&other));
}
TEST(span, FirstIndex)
{
std::array<int, 5> a = {4, 5, 4, 2, 5};
Span<int> a_span(a);
EXPECT_EQ(a_span.first_index(4), 0);
EXPECT_EQ(a_span.first_index(5), 1);
EXPECT_EQ(a_span.first_index(2), 3);
}
TEST(span, CastSameSize)
{
int value = 0;
std::array<int *, 4> a = {&value, nullptr, nullptr, nullptr};
Span<int *> a_span = a;
Span<float *> new_a_span = a_span.cast<float *>();
EXPECT_EQ(a_span.size(), 4);
EXPECT_EQ(new_a_span.size(), 4);
EXPECT_EQ(a_span[0], &value);
EXPECT_EQ(new_a_span[0], (float *)&value);
}
TEST(span, CastSmallerSize)
{
std::array<uint32_t, 4> a = {3, 4, 5, 6};
Span<uint32_t> a_span = a;
Span<uint16_t> new_a_span = a_span.cast<uint16_t>();
EXPECT_EQ(a_span.size(), 4);
EXPECT_EQ(new_a_span.size(), 8);
}
TEST(span, CastLargerSize)
{
std::array<uint16_t, 4> a = {4, 5, 6, 7};
Span<uint16_t> a_span = a;
Span<uint32_t> new_a_span = a_span.cast<uint32_t>();
EXPECT_EQ(a_span.size(), 4);
EXPECT_EQ(new_a_span.size(), 2);
}
TEST(span, VoidPointerSpan)
{
int a;
float b;
double c;
auto func1 = [](Span<void *> span) { EXPECT_EQ(span.size(), 3); };
func1({&a, &b, &c});
}
TEST(span, CopyFrom)
{
std::array<int, 4> src = {5, 6, 7, 8};
std::array<int, 4> dst = {1, 2, 3, 4};
EXPECT_EQ(dst[2], 3);
MutableSpan(dst).copy_from(src);
EXPECT_EQ(dst[0], 5);
EXPECT_EQ(dst[1], 6);
EXPECT_EQ(dst[2], 7);
EXPECT_EQ(dst[3], 8);
}
TEST(span, ReverseIterator)
{
std::array<int, 4> src = {4, 5, 6, 7};
Span<int> span = src;
Vector<int> reversed_vec;
for (auto it = span.rbegin(); it != span.rend(); ++it) {
reversed_vec.append(*it);
}
EXPECT_EQ(reversed_vec.size(), 4);
EXPECT_EQ_ARRAY(reversed_vec.data(), Span({7, 6, 5, 4}).data(), 4);
}
TEST(span, ReverseMutableSpan)
{
std::array<int, 0> src0 = {};
MutableSpan<int> span0 = src0;
span0.reverse();
EXPECT_EQ_ARRAY(span0.data(), Span<int>({}).data(), 0);
std::array<int, 1> src1 = {4};
MutableSpan<int> span1 = src1;
span1.reverse();
EXPECT_EQ_ARRAY(span1.data(), Span<int>({4}).data(), 1);
std::array<int, 2> src2 = {4, 5};
MutableSpan<int> span2 = src2;
span2.reverse();
EXPECT_EQ_ARRAY(span2.data(), Span<int>({5, 4}).data(), 2);
std::array<int, 5> src5 = {4, 5, 6, 7, 8};
MutableSpan<int> span5 = src5;
span5.reverse();
EXPECT_EQ_ARRAY(span5.data(), Span<int>({8, 7, 6, 5, 4}).data(), 5);
}
TEST(span, MutableReverseIterator)
{
std::array<int, 4> src = {4, 5, 6, 7};
MutableSpan<int> span = src;
Vector<int> reversed_vec;
for (auto it = span.rbegin(); it != span.rend(); ++it) {
reversed_vec.append(*it);
*it += 10;
}
EXPECT_EQ(reversed_vec.size(), 4);
EXPECT_EQ_ARRAY(reversed_vec.data(), Span({7, 6, 5, 4}).data(), 4);
EXPECT_EQ_ARRAY(src.data(), Span({14, 15, 16, 17}).data(), 4);
}
TEST(span, Constexpr)
{
static constexpr std::array<int, 3> src = {3, 2, 1};
constexpr Span<int> span(src);
BLI_STATIC_ASSERT(span[2] == 1, "");
BLI_STATIC_ASSERT(span.size() == 3, "");
BLI_STATIC_ASSERT(span.slice(1, 2).size() == 2, "");
BLI_STATIC_ASSERT(span.has_duplicates__linear_search() == false, "");
std::integral_constant<bool, span.first_index(1) == 2> ic;
BLI_STATIC_ASSERT(ic.value, "");
EXPECT_EQ(span.slice(1, 2).size(), 2);
}
TEST(span, ImplicitConversions)
{
BLI_STATIC_ASSERT((std::is_convertible_v<MutableSpan<int>, Span<int>>), "");
BLI_STATIC_ASSERT((std::is_convertible_v<Span<int *>, Span<const int *>>), "");
BLI_STATIC_ASSERT((std::is_convertible_v<MutableSpan<int *>, Span<int *>>), "");
BLI_STATIC_ASSERT((std::is_convertible_v<MutableSpan<int *>, Span<const int *>>), "");
BLI_STATIC_ASSERT((std::is_convertible_v<MutableSpan<int *>, MutableSpan<const int *>>), "");
BLI_STATIC_ASSERT((!std::is_convertible_v<MutableSpan<const int *>, MutableSpan<int *>>), "");
BLI_STATIC_ASSERT((!std::is_convertible_v<Span<const int *>, Span<int *>>), "");
BLI_STATIC_ASSERT((!std::is_convertible_v<Span<int *>, MutableSpan<const int *>>), "");
}
TEST(span, Comparison)
{
std::array<int, 3> a = {3, 4, 5};
std::array<int, 4> b = {3, 4, 5, 6};
EXPECT_FALSE(Span(a) == Span(b));
EXPECT_FALSE(Span(b) == Span(a));
EXPECT_TRUE(Span(a) == Span(b).take_front(3));
EXPECT_TRUE(Span(a) == Span(a));
EXPECT_TRUE(Span(b) == Span(b));
EXPECT_TRUE(Span(a) != Span(b));
EXPECT_TRUE(Span(b) != Span(a));
EXPECT_FALSE(Span(a) != Span(b).take_front(3));
EXPECT_FALSE(Span(a) != Span(a));
}
} // namespace blender::tests
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