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co-cpp19/src/array19.lib/array19/SliceOf.test.cpp at develop · basicpp/co-cpp19 · GitHub

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#include "SliceOf.h"

#include "SliceOf.carray.h"

#include "SliceOf.store.h"

#include <gtest/gtest.h>

using namespace array19;

void constexpr_SliceOf_test() {

constexpr static int a[3] = {1, 2, 3};

constexpr auto s = sliceOfCArray(a);

static_assert(s.count() == 3);

static_assert(s[1] == 2);

constexpr auto sum = [&] {

auto r = 0;

for (auto v : s) r += v;

return r;

}();

static_assert(sum == 6);

}

TEST(SliceOf, Access) {

int a[3] = {1, 2, 3};

auto s = sliceOfCArray(a);

EXPECT_EQ(s.count(), 3u);

EXPECT_EQ(s[1], 2);

auto sum = 0;

for (auto v : s) sum += v;

EXPECT_EQ(sum, 6);

}

void mutable_SliceOf_test() {

constexpr auto sa = [] {

int a[] = {1, 2, 3};

auto s = amendSliceOfCArray(a);

s[1] = 5;

return storeSlice<3>(s);

}();

static_assert(sa[1] == 5);

}

TEST(SliceOf, Mutate) {

int a[] = {1, 2, 3, 4};

auto s = amendSliceOfCArray(a);

s[1] = 5;

EXPECT_EQ(a[1], 5);

auto sa = storeSlice<4>(s);

EXPECT_EQ(sa[1], 5);

EXPECT_EQ(sa[3], 4);

}

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