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const_string small buffer

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close #118
This commit is contained in:
alandefreitas
2022-01-26 19:56:41 -03:00
committed by Vinnie Falco
parent 90e2837400
commit 0e014e86ac
5 changed files with 269 additions and 85 deletions
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207
test/unit/const_string.cpp
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@@ -21,6 +21,27 @@ struct const_string_test
{
using A = std::allocator<char>;
string_view big_;
string_view big2_;
string_view small_;
static constexpr std::size_t C =
const_string::builtin_capacity;
const_string_test() noexcept
{
string_view cs =
"*"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz";
BOOST_TEST(cs.size() > C);
big_ = cs.substr(1);
big2_ = cs;
small_ = big_.substr(0, C);
BOOST_TEST(big_.size() > C);
BOOST_TEST(small_.size() <= C);
BOOST_TEST(C > 3);
}
void
testConstString()
{
@@ -32,6 +53,7 @@ struct const_string_test
BOOST_TEST(s.empty());
// same buffer
BOOST_TEST(s.size() <= C);
BOOST_TEST(
const_string().data() ==
const_string().data());
@@ -40,15 +62,12 @@ struct const_string_test
// const_string(string_view, InitFn)
// ~const_string()
{
const_string s(3, A{},
[](std::size_t, char* dest)
const_string s(small_.size(), A{},
[&](std::size_t n, char* dest)
{
dest[0] = 'a';
dest[1] = 'b';
dest[2] = 'c';
small_.copy(dest, n, 0);
});
BOOST_TEST(s == "abc");
BOOST_TEST(! s.empty());
BOOST_TEST(s == small_);
}
// const_string(string_view, Allocator)
@@ -60,34 +79,121 @@ struct const_string_test
BOOST_TEST(! s.empty());
// different buffer
BOOST_TEST(s.size() <= C);
BOOST_TEST(s.data() != x);
}
// const_string(const_string const&)
{
const_string s1("abc", A{});
const_string s2(s1);
BOOST_TEST(s1 == "abc");
BOOST_TEST(s2 == "abc");
BOOST_TEST(s2 == s1);
// small buffer
{
auto c = small_;
const_string s1(c, A{});
const_string s2(s1);
BOOST_TEST(s1 == c);
BOOST_TEST(s2 == c);
BOOST_TEST(s2 == s1);
// same buffer
BOOST_TEST(s1.data() == s2.data());
// different buffer
BOOST_TEST(s1.size() <= C);
BOOST_TEST(s1.data() != s2.data());
}
// big buffer
{
const_string s1(big_, A{});
const_string s2(s1);
BOOST_TEST(s1 == big_);
BOOST_TEST(s2 == big_);
BOOST_TEST(s2 == s1);
// same buffer
BOOST_TEST(s1.size() > C);
BOOST_TEST(s1.data() == s2.data());
}
}
// operator=(const_string const&)
{
const_string s1("abc", A{});
const_string s2;
BOOST_TEST(s1 == "abc");
BOOST_TEST(s2.empty());
s2 = s1;
BOOST_TEST(s1 == "abc");
BOOST_TEST(s2 == "abc");
BOOST_TEST(s2 == s1);
// small
{
const_string s1("abc", A{});
const_string s2;
BOOST_TEST(s1 == "abc");
BOOST_TEST(s2.empty());
s2 = s1;
BOOST_TEST(s1 == "abc");
BOOST_TEST(s2 == "abc");
BOOST_TEST(s2 == s1);
// same buffer
BOOST_TEST(s1.data() == s2.data());
// different buffer
BOOST_TEST(s1.size() <= C);
BOOST_TEST(s1.data() != s2.data());
}
// big
{
const_string s1(big_, A{});
const_string s2;
BOOST_TEST(s1 == big_);
BOOST_TEST(s2.empty());
s2 = s1;
BOOST_TEST(s1 == big_);
BOOST_TEST(s2 == big_);
BOOST_TEST(s2 == s1);
// same buffer
BOOST_TEST(s1.size() > C);
BOOST_TEST(s1.data() == s2.data());
}
// big
{
const_string s1(small_, A{});
const_string s2(big_, A{});
BOOST_TEST(s1 == small_);
BOOST_TEST(s2 == big_);
s1 = s2;
BOOST_TEST(s1 == big_);
BOOST_TEST(s2 == big_);
BOOST_TEST(s2 == s1);
// same buffer
BOOST_TEST(s1.size() > C);
BOOST_TEST(s1.data() == s2.data());
}
// big
{
const_string s1(big_, A{});
const_string s2(big2_, A{});
BOOST_TEST(s1 == big_);
BOOST_TEST(s2 == big2_);
s1 = s2;
BOOST_TEST(s1 == big2_);
BOOST_TEST(s2 == big2_);
BOOST_TEST(s2 == s1);
// same buffer
BOOST_TEST(s1.size() > C);
BOOST_TEST(s1.data() == s2.data());
}
// operator= (coverage)
{
const_string s1(big_, A{});
const_string s2(small_, A{});
s1 = s2;
BOOST_TEST(s1 == s2);
}
// operator= (self-assignment)
{
const_string s(small_, A{});
const_string const& cs(s);
s = cs;
BOOST_TEST(s == small_);
}
}
}
@@ -121,15 +227,28 @@ struct const_string_test
const_string s;
{
factory a;
s = a(3,
[](std::size_t, char* dest)
s = a(C,
[this](
std::size_t n,
char* dest)
{
dest[0] = 'a';
dest[1] = 'b';
dest[2] = 'c';
small_.copy(dest, n, 0);
});
}
BOOST_TEST(s == "abc");
BOOST_TEST(s == small_);
BOOST_TEST(! s.empty());
}
{
const_string s;
{
factory a;
s = a(big_.size(),
[this](std::size_t n, char* dest)
{
big_.copy(dest, n, 0);
});
}
BOOST_TEST(s == big_);
BOOST_TEST(! s.empty());
}
{
@@ -137,15 +256,31 @@ struct const_string_test
const_string s;
{
factory a(sp.allocator());
s = a(3,
[](std::size_t, char* dest)
s = a(C,
[this](
std::size_t n,
char* dest)
{
dest[0] = 'a';
dest[1] = 'b';
dest[2] = 'c';
small_.copy(dest, n, 0);
});
}
BOOST_TEST(s == "abc");
BOOST_TEST(s == small_);
BOOST_TEST(! s.empty());
}
{
static_pool<1000> sp;
const_string s;
{
factory a(sp.allocator());
s = a(big_.size(),
[this](
std::size_t n,
char* dest)
{
big_.copy(dest, n, 0);
});
}
BOOST_TEST(s == big_);
BOOST_TEST(! s.empty());
}
}