blob: 196eadda5a55f18c786d1e60cc229a89add3b1d7 [file] [log] [blame]
/*
* Copyright 2022 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkSpan.h"
#include "tests/Test.h"
#include <array>
#include <cstddef>
#include <cstdint>
#include <vector>
DEF_TEST(SkSpanBasicTemplateGuide, reporter) {
// Test constness preservation for SkSpan.
{
std::vector<int> v = {{1, 2, 3, 4, 5}};
auto s = SkSpan(v);
REPORTER_ASSERT(reporter, s[3] == 4);
s[3] = 100;
REPORTER_ASSERT(reporter, s[3] == 100);
}
{
std::vector<int> t = {{1, 2, 3, 4, 5}};
const std::vector<int>& v = t;
auto s = SkSpan(v);
//s[3] = 100; // Should fail to compile
REPORTER_ASSERT(reporter, s[3] == 4);
REPORTER_ASSERT(reporter, t[3] == 4);
t[3] = 100;
REPORTER_ASSERT(reporter, s[3] == 100);
}
{
std::array<int, 5> v = {{1, 2, 3, 4, 5}};
auto s = SkSpan(v); // {1, 2, 3, 4, 5}
REPORTER_ASSERT(reporter, s[3] == 4);
s[3] = 100; // {1, 2, 3, 100, 5}
REPORTER_ASSERT(reporter, s[3] == 100);
auto s1 = s.subspan(1,3); // {2, 3, 100}
REPORTER_ASSERT(reporter, s1.size() == 3);
REPORTER_ASSERT(reporter, s1.front() == 2);
REPORTER_ASSERT(reporter, s1.back() == 100);
auto s2 = s.subspan(2); // {3, 100, 5}
REPORTER_ASSERT(reporter, s2.size() == 3);
REPORTER_ASSERT(reporter, s2.front() == 3);
REPORTER_ASSERT(reporter, s2.back() == 5);
}
{
std::array<int, 5> t = {{1, 2, 3, 4, 5}};
const std::array<int, 5>& v = t;
auto s = SkSpan(v);
//s[3] = 100; // Should fail to compile
REPORTER_ASSERT(reporter, s[3] == 4);
REPORTER_ASSERT(reporter, t[3] == 4);
t[3] = 100;
REPORTER_ASSERT(reporter, s[3] == 100);
}
{
std::vector<int> v;
auto s = SkSpan(v);
REPORTER_ASSERT(reporter, s.empty());
}
auto routine = [&](SkSpan<const int> a) {
REPORTER_ASSERT(reporter, a.size() == 4);
};
routine({1,2,3,4});
}
static bool test_span_parameter(SkSpan<const int> s) {
return s[0] == 1 && s[1] == 2 && s[2] == 3;
}
DEF_TEST(SkSpanDeduceParam, reporter) {
{
std::vector<int> v = {{1, 2, 3}};
REPORTER_ASSERT(reporter, test_span_parameter(v));
}
{
int v[]{1, 2, 3};
REPORTER_ASSERT(reporter, test_span_parameter(v));
}
{
test_span_parameter({1, 2, 3});
REPORTER_ASSERT(reporter, test_span_parameter({1, 2, 3}));
}
{
int v[]{1, 2, 3};
auto s = SkSpan(v);
REPORTER_ASSERT(reporter, test_span_parameter(s));
}
}
DEF_TEST(SkSpanDeduceSize, reporter) {
int d[] = {1, 2, 3, 4, 5};
{
int s = std::size(d);
SkSpan span = SkSpan{d, s};
REPORTER_ASSERT(reporter, span.size() == std::size(d));
}
{
uint32_t s = std::size(d);
SkSpan span = SkSpan{d, s};
REPORTER_ASSERT(reporter, span.size() == std::size(d));
}
{
size_t s = std::size(d);
SkSpan span = SkSpan{d, s};
REPORTER_ASSERT(reporter, span.size() == std::size(d));
}
{
struct C {
int* data() { return nullptr; }
int size() const { return 0; }
};
C c;
SkSpan span = SkSpan(c);
REPORTER_ASSERT(reporter, span.size() == 0);
}
}