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fmt/test/prepare-test.cc
Daniela Engert 01f34d0b0b Fix library deprecation warning 
Since C++17, using template specialization 'std::allocator<void>' in any shape or form (even just mentioning it) is deprecated! A simple workaround is replacing 'void' by another (preferably empty) type, e.g. 'fmt::monostate'.

Found by Clang 9 in Visual Studio.
2019-02-07 12:20:46 -08:00

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// Formatting library for C++ - formatting library tests
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to prepare.h.
#include <stdint.h>
#include <cctype>
#include <cfloat>
#include <climits>
#include <cmath>
#include <cstring>
#include <deque>
#include <list>
#include <memory>
#include <string>
// Check if fmt/prepare.h compiles with windows.h included before it.
#ifdef _WIN32
# include <windows.h>
#endif
#include "fmt/prepare.h"
#include "gmock.h"
#include "gtest-extra.h"
#include "mock-allocator.h"
#include "util.h"
#undef ERROR
#undef min
#undef max
using testing::Return;
using testing::StrictMock;
class mock_parts_collector {
public:
MOCK_METHOD1(add, void(fmt::format_part<char>));
MOCK_METHOD1(substitute_last, void(fmt::format_part<char>));
MOCK_METHOD0(last, fmt::format_part<char>());
};
FMT_BEGIN_NAMESPACE
bool operator==(const internal::string_view_metadata& lhs,
const internal::string_view_metadata& rhs) {
return std::tie(lhs.offset_, lhs.size_) == std::tie(rhs.offset_, rhs.size_);
}
bool operator!=(const internal::string_view_metadata& lhs,
const internal::string_view_metadata& rhs) {
return !(lhs == rhs);
}
bool operator==(const format_part<char>::specification& lhs,
const format_part<char>::specification& rhs) {
if (lhs.arg_id.which != rhs.arg_id.which) {
return false;
}
typedef format_part<char>::argument_id::which_arg_id which_arg_id;
switch (lhs.arg_id.which) {
case which_arg_id::index: {
if (lhs.arg_id.val.index != rhs.arg_id.val.index) {
return false;
}
} break;
case which_arg_id::named_index: {
if (lhs.arg_id.val.named_index != rhs.arg_id.val.named_index) {
return false;
}
} break;
}
return std::tie(lhs.parsed_specs.width_, lhs.parsed_specs.fill_,
lhs.parsed_specs.align_, lhs.parsed_specs.precision,
lhs.parsed_specs.flags, lhs.parsed_specs.type) ==
std::tie(rhs.parsed_specs.width_, rhs.parsed_specs.fill_,
rhs.parsed_specs.align_, rhs.parsed_specs.precision,
rhs.parsed_specs.flags, rhs.parsed_specs.type);
}
bool operator!=(const format_part<char>::specification& lhs,
const format_part<char>::specification& rhs) {
return !(lhs == rhs);
}
bool operator==(const format_part<char>& lhs,
const fmt::format_part<char>& rhs) {
typedef format_part<char>::which_value which_value;
if (lhs.which != rhs.which ||
lhs.end_of_argument_id != rhs.end_of_argument_id) {
return false;
}
switch (lhs.which) {
case which_value::argument_id: {
return lhs.val.arg_id == rhs.val.arg_id;
}
case which_value::named_argument_id: {
return lhs.val.named_arg_id == rhs.val.named_arg_id;
}
case which_value::text: {
return lhs.val.text == rhs.val.text;
}
case which_value::specification: {
return lhs.val.spec == rhs.val.spec;
}
}
return false;
}
bool operator!=(const fmt::format_part<char>& lhs,
const fmt::format_part<char>& rhs) {
return !(lhs == rhs);
}
FMT_END_NAMESPACE
TEST(PrepareTest, FormatPart_ComparisonOperators) {
typedef fmt::format_part<char> format_part;
typedef fmt::internal::dynamic_format_specs<char> prepared_specs;
{
const auto part = format_part(0u);
const auto other = format_part(0u);
EXPECT_EQ(part, other);
}
{
const auto lhs = format_part(0u);
const auto rhs = format_part(1u);
EXPECT_NE(lhs, rhs);
}
{
const auto lhs = format_part(fmt::internal::string_view_metadata(0, 42));
const auto rhs = format_part(fmt::internal::string_view_metadata(0, 42));
EXPECT_EQ(lhs, rhs);
}
{
const auto lhs = format_part(fmt::internal::string_view_metadata(0, 42));
const auto rhs = format_part(fmt::internal::string_view_metadata(0, 4422));
EXPECT_NE(lhs, rhs);
}
{
auto lhs = format_part(0u);
auto rhs = format_part(fmt::internal::string_view_metadata(0, 42));
EXPECT_NE(lhs, rhs);
rhs = format_part(fmt::internal::string_view_metadata(0, 0));
EXPECT_NE(lhs, rhs);
}
{
auto lhs = format_part(0u);
lhs.end_of_argument_id = 42;
auto rhs = format_part(0u);
rhs.end_of_argument_id = 42;
EXPECT_EQ(lhs, rhs);
rhs.end_of_argument_id = 13;
EXPECT_NE(lhs, rhs);
}
{
const auto specs_argument_id = 0u;
const auto specs_named_argument_id =
fmt::internal::string_view_metadata(0, 42);
auto specs = format_part::specification(0u);
auto lhs = format_part(specs);
auto rhs = format_part(specs);
EXPECT_EQ(lhs, rhs);
specs.parsed_specs = prepared_specs();
lhs = format_part(specs);
rhs = format_part(specs);
EXPECT_EQ(lhs, rhs);
specs = format_part::specification(specs_named_argument_id);
lhs = format_part(specs);
rhs = format_part(specs);
EXPECT_EQ(lhs, rhs);
specs.parsed_specs = prepared_specs();
lhs = format_part(specs);
rhs = format_part(specs);
EXPECT_EQ(lhs, rhs);
auto lhs_spec = format_part::specification(specs_argument_id);
auto rhs_spec = format_part::specification(specs_named_argument_id);
lhs = format_part(lhs_spec);
rhs = format_part(rhs_spec);
EXPECT_NE(lhs, rhs);
lhs_spec = format_part::specification(specs_argument_id);
rhs_spec = format_part::specification(specs_argument_id);
lhs_spec.parsed_specs.precision = 1;
rhs_spec.parsed_specs.precision = 2;
lhs = format_part(lhs_spec);
rhs = format_part(rhs_spec);
EXPECT_NE(lhs, rhs);
}
{
const auto specs_argument_id = 0u;
const auto specs_named_argument_id =
fmt::internal::string_view_metadata(0, 42);
auto specs = format_part::specification(specs_argument_id);
auto lhs = format_part(specs);
auto rhs = format_part(0u);
auto rhs2 = format_part(fmt::internal::string_view_metadata(0, 42));
EXPECT_NE(lhs, rhs);
EXPECT_NE(lhs, rhs2);
specs.parsed_specs = prepared_specs();
lhs = format_part{specs};
EXPECT_NE(lhs, rhs);
EXPECT_NE(lhs, rhs2);
specs = format_part::specification(specs_named_argument_id);
EXPECT_NE(lhs, rhs);
EXPECT_NE(lhs, rhs2);
specs.parsed_specs = prepared_specs();
lhs = format_part(specs);
EXPECT_NE(lhs, rhs);
EXPECT_NE(lhs, rhs2);
}
}
TEST(PrepareTest, FormatPreparationHandler_OnText_AddsPartWithText) {
typedef fmt::format_part<char> format_part;
typedef StrictMock<mock_parts_collector> parts_mock;
parts_mock parts;
const auto format = fmt::internal::to_string_view("text");
fmt::internal::format_preparation_handler<char, parts_mock> handler(format,
parts);
const auto expected_text = fmt::internal::string_view_metadata(
0u, static_cast<unsigned>(format.size()));
EXPECT_CALL(parts, add(format_part(expected_text)));
handler.on_text(format.begin(), format.end());
}
TEST(PrepareTest, FormatPreparationHandler_OnArgId_AddsPartWithIncrementedId) {
typedef fmt::format_part<char> format_part;
typedef StrictMock<mock_parts_collector> parts_mock;
parts_mock parts;
const auto format = fmt::internal::to_string_view("");
fmt::internal::format_preparation_handler<char, parts_mock> handler(format,
parts);
const auto expected_first_arg_id = 0u;
const auto expected_second_arg_id = 1u;
EXPECT_CALL(parts, add(format_part(expected_first_arg_id)));
EXPECT_CALL(parts, add(format_part(expected_second_arg_id)));
handler.on_arg_id();
handler.on_arg_id();
}
TEST(PrepareTest, FormatPreparationHandler_OnArgId_AddsPartWithPassedId) {
typedef fmt::format_part<char> format_part;
typedef StrictMock<mock_parts_collector> parts_mock;
parts_mock parts;
const auto format = fmt::internal::to_string_view("");
fmt::internal::format_preparation_handler<char, parts_mock> handler(format,
parts);
const auto expected_first_arg_id = 2u;
const auto expected_second_arg_id = 0u;
const auto expected_third_arg_id = 1u;
EXPECT_CALL(parts, add(format_part(expected_first_arg_id)));
EXPECT_CALL(parts, add(format_part(expected_second_arg_id)));
EXPECT_CALL(parts, add(format_part(expected_third_arg_id)));
handler.on_arg_id(expected_first_arg_id);
handler.on_arg_id(expected_second_arg_id);
handler.on_arg_id(expected_third_arg_id);
}
TEST(PrepareTest, FormatPreparationHandler_OnArgId_AddsPartWithPassedNamedId) {
typedef fmt::format_part<char> format_part;
typedef format_part::named_argument_id named_argument_id;
typedef StrictMock<mock_parts_collector> parts_mock;
parts_mock parts;
const auto format = fmt::internal::to_string_view("0123456789");
fmt::internal::format_preparation_handler<char, parts_mock> handler(format,
parts);
const auto expected_first_arg_id = fmt::string_view(format.data(), 1);
const auto expected_first_arg_view_metadata =
fmt::internal::string_view_metadata(0, 1);
const auto expected_second_arg_id = fmt::string_view(format.data() + 3, 2);
const auto expected_second_arg_view_metadata =
fmt::internal::string_view_metadata(3, 2);
const auto expected_third_arg_id = fmt::string_view(format.data() + 6, 3);
const auto expected_third_arg_view_metadata =
fmt::internal::string_view_metadata(6, 3);
EXPECT_CALL(
parts,
add(format_part(named_argument_id(expected_first_arg_view_metadata))));
EXPECT_CALL(
parts,
add(format_part(named_argument_id(expected_second_arg_view_metadata))));
EXPECT_CALL(
parts,
add(format_part(named_argument_id(expected_third_arg_view_metadata))));
handler.on_arg_id(expected_first_arg_id);
handler.on_arg_id(expected_second_arg_id);
handler.on_arg_id(expected_third_arg_id);
}
TEST(PrepareTest,
FormatPreparationHandler_OnReplacementField_SetsEndOfArgumentId) {
typedef fmt::format_part<char> format_part;
typedef StrictMock<mock_parts_collector> parts_mock;
const auto format = fmt::internal::to_string_view("{:<}");
parts_mock parts;
const auto last_part = format_part(0u);
EXPECT_CALL(parts, last()).WillOnce(Return(last_part));
auto expected_substitution_part = last_part;
expected_substitution_part.end_of_argument_id = 1;
EXPECT_CALL(parts, substitute_last(expected_substitution_part));
fmt::internal::format_preparation_handler<char, parts_mock> handler(format,
parts);
handler.on_replacement_field(format.data() + 1);
}
TEST(
PrepareTest,
FormatPreparationHandlerLastPartArgIndex_OnFormatSpecs_UpdatesLastAddedPart) {
typedef fmt::format_part<char> format_part;
typedef StrictMock<mock_parts_collector> parts_mock;
parts_mock parts;
const auto specification_test_text = fmt::internal::to_string_view("{:<10}");
const auto specification_offset = 2u;
const auto specification_begin_it =
specification_test_text.begin() + specification_offset;
fmt::internal::format_preparation_handler<char, parts_mock> handler(
specification_test_text, parts);
const auto last_part = format_part(0u);
format_part::specification expected_specification(0u);
fmt::internal::dynamic_format_specs<char> specs{};
specs.align_ = fmt::alignment::ALIGN_LEFT;
specs.width_ = 10;
expected_specification.parsed_specs = specs;
auto expected_substitution_part = format_part(expected_specification);
expected_substitution_part.end_of_argument_id = specification_offset;
EXPECT_CALL(parts, last()).WillOnce(Return(last_part));
EXPECT_CALL(parts, substitute_last(expected_substitution_part));
handler.on_format_specs(specification_begin_it,
specification_test_text.end());
}
TEST(
PrepareTest,
FormatPreparationHandlerLastPartNamedArgIndex_OnFormatSpecs_UpdatesLastAddedPart) {
typedef fmt::format_part<char> format_part;
typedef StrictMock<mock_parts_collector> parts_mock;
parts_mock parts;
const auto specification_test_text = fmt::internal::to_string_view("{:<10}");
const auto specification_offset = 2u;
const auto specification_begin_it =
specification_test_text.begin() + specification_offset;
fmt::internal::format_preparation_handler<char, parts_mock> handler(
specification_test_text, parts);
const auto arg_id = fmt::internal::string_view_metadata(0, 42);
const auto last_part = format_part(format_part::named_argument_id(arg_id));
format_part::specification expected_specification(arg_id);
fmt::internal::dynamic_format_specs<char> specs{};
specs.align_ = fmt::alignment::ALIGN_LEFT;
specs.width_ = 10;
expected_specification.parsed_specs = specs;
auto expected_substitution_part = format_part(expected_specification);
expected_substitution_part.end_of_argument_id = specification_offset;
EXPECT_CALL(parts, last()).WillOnce(Return(last_part));
EXPECT_CALL(parts, substitute_last(expected_substitution_part));
handler.on_format_specs(specification_begin_it,
specification_test_text.end());
}
// compiletime_prepared_parts_type_provider is useful only with relaxed
// constexpr.
#if FMT_USE_CONSTEXPR
template <unsigned EXPECTED_PARTS_COUNT, typename Format>
void check_prepared_parts_type(Format format) {
typedef fmt::internal::compiletime_prepared_parts_type_provider<decltype(
format)>
provider;
typedef typename provider::template format_parts_array<EXPECTED_PARTS_COUNT>
expected_parts_type;
static_assert(
std::is_same<typename provider::type, expected_parts_type>::value,
"CompileTimePreparedPartsTypeProvider test failed");
}
TEST(PrepareTest, CompileTimePreparedPartsTypeProvider) {
check_prepared_parts_type<1u>(FMT_STRING("text"));
check_prepared_parts_type<1u>(FMT_STRING("{}"));
check_prepared_parts_type<2u>(FMT_STRING("text{}"));
check_prepared_parts_type<2u>(FMT_STRING("{}text"));
check_prepared_parts_type<3u>(FMT_STRING("text{}text"));
check_prepared_parts_type<3u>(FMT_STRING("{:{}.{}} {:{}}"));
check_prepared_parts_type<3u>(FMT_STRING("{{{}}}")); // '{', 'argument', '}'
check_prepared_parts_type<2u>(FMT_STRING("text{{")); // 'text', '{'
check_prepared_parts_type<3u>(FMT_STRING("text{{ ")); // 'text', '{', ' '
check_prepared_parts_type<2u>(FMT_STRING("}}text")); // '}', text
check_prepared_parts_type<2u>(FMT_STRING("text}}text")); // 'text}', 'text'
check_prepared_parts_type<4u>(
FMT_STRING("text{{}}text")); // 'text', '{', '}', 'text'
}
#endif
// Use the struct instead of a function to workaround GCC 4.4's 'sorry,
// unimplemented: mangling template_id_expr' issue.
template <typename... Args> struct copied_prepared_format_creator {
static decltype(fmt::prepare<Args...>(fmt::internal::declval<std::string>()))
make(std::string format_str) {
auto prepared_format = fmt::prepare<Args...>(std::move(format_str));
auto copied_prepared_format = prepared_format;
prepared_format = fmt::prepare<Args...>("");
return copied_prepared_format;
}
};
TEST(PrepareTest, CopyPreparedFormat_InternalStringViewsAreNotInvalidated) {
auto prepared = copied_prepared_format_creator<int, std::string>::make(
"before {} middle {} after");
EXPECT_EQ("before 42 middle text after", prepared.format(42, "text"));
prepared = copied_prepared_format_creator<int, std::string>::make(
"before {0} middle {1} after");
EXPECT_EQ("before 42 middle text after", prepared.format(42, "text"));
{
typedef decltype(fmt::arg("first", 42)) argument0;
typedef decltype(fmt::arg("second", "text")) argument1;
auto named_prepared =
copied_prepared_format_creator<argument0, argument1>::make(
"before {first} middle {second} after");
EXPECT_EQ("before 42 middle text after",
named_prepared.format(fmt::arg("first", 42),
fmt::arg("second", "text")));
}
{
typedef decltype(fmt::arg("value", "12345")) argument0;
typedef decltype(fmt::arg("width", 10)) argument1;
auto named_prepared =
copied_prepared_format_creator<argument0, argument1>::make(
">>>{value:>{width}}<<<");
EXPECT_EQ(">>> 12345<<<",
named_prepared.format(fmt::arg("value", "12345"),
fmt::arg("width", 10)));
}
}
TEST(PepareTest, ReusedPreparedFormatType) {
typedef fmt::prepared_format<std::string, int>::type prepared_format;
prepared_format prepared = fmt::prepare<prepared_format>("The {} is {}.");
EXPECT_EQ("The answer is 42.", prepared.format("answer", 42));
prepared = fmt::prepare<prepared_format>("40 {} 2 = {}");
EXPECT_EQ("40 + 2 = 42", prepared.format("+", 42));
}
TEST(PrepareTest, UserProvidedPartsContainerUnderlyingContainer) {
typedef fmt::format_part<char> format_part;
typedef fmt::parts_container<char, std::list<format_part>>::type
parts_container;
typedef fmt::basic_prepared_format<std::string, parts_container, std::string,
int>::type prepared_format;
prepared_format prepared = fmt::prepare<prepared_format>("The {} is {}.");
EXPECT_EQ("The answer is 42.", prepared.format("answer", 42));
prepared = fmt::prepare<prepared_format>("40 {} 2 = {}");
EXPECT_EQ("40 + 2 = 42", prepared.format("+", 42));
}
class custom_parts_container {
public:
typedef fmt::format_part<char> format_part_type;
private:
typedef std::deque<format_part_type> parts;
public:
void add(format_part_type part) { parts_.push_back(std::move(part)); }
void substitute_last(format_part_type part) {
parts_.back() = std::move(part);
}
format_part_type last() { return parts_.back(); }
auto begin() -> decltype(fmt::internal::declval<parts>().begin()) {
return parts_.begin();
}
auto begin() const
-> decltype(fmt::internal::declval<const parts>().begin()) {
return parts_.begin();
}
auto end() -> decltype(fmt::internal::declval<parts>().begin()) {
return parts_.end();
}
auto end() const -> decltype(fmt::internal::declval<const parts>().begin()) {
return parts_.end();
}
private:
parts parts_;
};
TEST(PrepareTest, UserProvidedPartsContainer) {
typedef fmt::basic_prepared_format<std::string, custom_parts_container,
std::string, int>::type prepared_format;
prepared_format prepared = fmt::prepare<prepared_format>("The {} is {}.");
EXPECT_EQ("The answer is 42.", prepared.format("answer", 42));
prepared = fmt::prepare<prepared_format>("40 {} 2 = {}");
EXPECT_EQ("40 + 2 = 42", prepared.format("+", 42));
}
TEST(PrepareTest, PassConstCharPointerFormat) {
const char* c_format = "test {}";
const auto prepared = fmt::prepare<int>(c_format);
EXPECT_EQ("test 42", prepared.format(42));
const wchar_t* wc_format = L"test {}";
const auto wprepared = fmt::prepare<int>(wc_format);
EXPECT_EQ(L"test 42", wprepared.format(42));
}
TEST(PrepareTest, PassCharArrayFormat) {
char c_format[] = "test {}";
const auto prepared = fmt::prepare<int>(c_format);
EXPECT_EQ("test 42", prepared.format(42));
wchar_t wc_format[] = L"test {}";
const auto wprepared = fmt::prepare<int>(wc_format);
EXPECT_EQ(L"test 42", wprepared.format(42));
}
TEST(PrepareTest, PassConstCharArrayFormat) {
const char c_format[] = "test {}";
const auto prepared = fmt::prepare<int>(c_format);
EXPECT_EQ("test 42", prepared.format(42));
const wchar_t wc_format[] = L"test {}";
const auto wprepared = fmt::prepare<int>(wc_format);
EXPECT_EQ(L"test 42", wprepared.format(42));
}
TEST(PrepareTest, PassStringLiteralFormat) {
const auto prepared = fmt::prepare<int>("test {}");
EXPECT_EQ("test 42", prepared.format(42));
const auto wprepared = fmt::prepare<int>(L"test {}");
EXPECT_EQ(L"test 42", wprepared.format(42));
}
TEST(PrepareTest, PassStringViewFormat) {
const auto prepared =
fmt::prepare<int>(fmt::basic_string_view<char>("test {}"));
EXPECT_EQ("test 42", prepared.format(42));
const auto wprepared =
fmt::prepare<int>(fmt::basic_string_view<wchar_t>(L"test {}"));
EXPECT_EQ(L"test 42", wprepared.format(42));
}
TEST(PrepareTest, PassBasicStringFormat) {
const auto prepared = fmt::prepare<int>(std::string("test {}"));
EXPECT_EQ("test 42", prepared.format(42));
const auto wprepared = fmt::prepare<int>(std::wstring(L"test {}"));
EXPECT_EQ(L"test 42", wprepared.format(42));
}
#if FMT_USE_CONSTEXPR
TEST(PrepareTest, PassCompileString) {
const auto prepared = fmt::prepare<int>(FMT_STRING("test {}"));
EXPECT_EQ("test 42", prepared.format(42));
const auto wprepared = fmt::prepare<int>(FMT_STRING(L"test {}"));
EXPECT_EQ(L"test 42", wprepared.format(42));
}
#endif
template <typename T> struct user_allocator {
typedef T value_type;
typedef value_type* pointer;
typedef const value_type* const_pointer;
typedef value_type& reference;
typedef const value_type& const_reference;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
template <typename U> struct rebind { typedef user_allocator<U> other; };
user_allocator() = default;
~user_allocator() = default;
template <typename U> user_allocator(const user_allocator<U>&) {}
pointer allocate(
size_type cnt,
typename std::allocator<fmt::monostate>::const_pointer = FMT_NULL) {
return new value_type[cnt];
}
void deallocate(pointer p, size_type) { delete[] p; }
void construct(pointer p, const value_type& val) { new (p) value_type(val); }
void destroy(pointer p) { (*p).~value_type(); }
bool operator==(const user_allocator&) const { return true; }
bool operator!=(const user_allocator&) const { return false; }
};
TEST(PrepareTest, PassUserTypeFormat) {
typedef std::basic_string<char, std::char_traits<char>, user_allocator<char>>
user_format;
const auto prepared = fmt::prepare<int>(user_format("test {}"));
EXPECT_EQ("test 42", prepared.format(42));
}
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