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#include "args.hh"
#include <cstddef>
#include <gtest/gtest.h>
#include <memory>
#include <sstream>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#define SETUP_OPTIONS(args) \
auto short_only = (args)->option('a', "", "an option"); \
auto short_long = (args)->option('b', "bold", "set font style to bold"); \
auto long_only = (args)->option("cold", "use if it is cold outside"); \
auto short_only_req = (args)->option_argument('d', "", "", "distance"); \
auto short_long_req = (args)->option_argument( \
'e', "eat", "FOOD", "what to order, what to eat?"); \
auto long_only_req = \
(args)->option_argument("form", "", "circle, shape or something else?"); \
auto short_only_opt = (args)->option_argument('g', "", "", "", false); \
auto short_long_opt = (args)->option_argument('h', "hold", "", "", false); \
auto long_only_opt = (args)->option_argument("invert", "", "", false);
namespace {
class Arguments {
public:
[[nodiscard]] int c() const { return static_cast<int>(str_.size()); };
[[nodiscard]] char** v() const { return ptr_.get(); }
explicit Arguments(std::vector<std::string> str) : str_(std::move(str)) {
ptr_ = std::make_unique<char*[]>(str_.size());
for (size_t i = 0; i < str_.size(); ++i) {
ptr_[i] = const_cast<char*>(str_[i].c_str());
}
}
Arguments(Arguments const&) = delete;
Arguments& operator=(Arguments const&) = delete;
private:
std::unique_ptr<char*[]> ptr_;
std::vector<std::string> str_;
};
class Builder {
public:
Arguments build() { return Arguments(std::move(str_)); }
Builder& add(std::string str) {
str_.emplace_back(std::move(str));
return *this;
}
private:
std::vector<std::string> str_;
};
} // namespace
TEST(args, empty) {
auto args = Args::create();
EXPECT_TRUE(args->run(0, nullptr));
{
std::stringstream ss;
args->print_error(ss);
EXPECT_EQ("", ss.str());
}
{
std::stringstream ss;
args->print_help(ss);
EXPECT_EQ("", ss.str());
}
}
TEST(args, options_not_set) {
auto args = Args::create();
SETUP_OPTIONS(args);
EXPECT_TRUE(args->run(0, nullptr));
EXPECT_FALSE(short_only->is_set());
EXPECT_FALSE(short_long->is_set());
EXPECT_FALSE(long_only->is_set());
EXPECT_FALSE(short_only_req->is_set());
EXPECT_FALSE(short_long_req->is_set());
EXPECT_FALSE(long_only_req->is_set());
EXPECT_FALSE(short_only_opt->is_set());
EXPECT_FALSE(short_long_opt->is_set());
EXPECT_FALSE(long_only_opt->is_set());
}
TEST(args, options_not_set_arguments) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("bar").add("fum").build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
ASSERT_EQ(2, out.size());
EXPECT_EQ("bar", out[0]);
EXPECT_EQ("fum", out[1]);
}
TEST(args, options_set) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo")
.add("-a")
.add("-b")
.add("--cold")
.add("-d")
.add("10")
.add("-e")
.add("hamburger")
.add("--form=circle")
.add("-g")
.add("-h")
.add("--invert")
.build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
EXPECT_TRUE(out.empty());
EXPECT_TRUE(short_only->is_set());
EXPECT_TRUE(short_long->is_set());
EXPECT_TRUE(long_only->is_set());
EXPECT_TRUE(short_only_req->is_set());
EXPECT_TRUE(short_only_req->has_argument());
EXPECT_EQ("10", short_only_req->argument());
EXPECT_TRUE(short_long_req->is_set());
EXPECT_TRUE(short_long_req->has_argument());
EXPECT_EQ("hamburger", short_long_req->argument());
EXPECT_TRUE(long_only_req->is_set());
EXPECT_TRUE(long_only_req->has_argument());
EXPECT_EQ("circle", long_only_req->argument());
EXPECT_TRUE(short_only_opt->is_set());
EXPECT_FALSE(short_only_opt->has_argument());
EXPECT_TRUE(short_long_opt->is_set());
EXPECT_FALSE(short_long_opt->has_argument());
EXPECT_TRUE(long_only_opt->is_set());
EXPECT_FALSE(long_only_opt->has_argument());
}
TEST(args, options_set_variant) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo")
.add("-a")
.add("--bold")
.add("--cold")
.add("-d")
.add("10")
.add("--eat=hamburger")
.add("--form")
.add("circle")
.add("-g")
.add("--hold=foo")
.add("--invert=bar")
.build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
EXPECT_TRUE(out.empty());
EXPECT_TRUE(short_only->is_set());
EXPECT_TRUE(short_long->is_set());
EXPECT_TRUE(long_only->is_set());
EXPECT_TRUE(short_only_req->is_set());
EXPECT_TRUE(short_only_req->has_argument());
EXPECT_EQ("10", short_only_req->argument());
EXPECT_TRUE(short_long_req->is_set());
EXPECT_TRUE(short_long_req->has_argument());
EXPECT_EQ("hamburger", short_long_req->argument());
EXPECT_TRUE(long_only_req->is_set());
EXPECT_TRUE(long_only_req->has_argument());
EXPECT_EQ("circle", long_only_req->argument());
EXPECT_TRUE(short_only_opt->is_set());
EXPECT_FALSE(short_only_opt->has_argument());
EXPECT_TRUE(short_long_opt->is_set());
EXPECT_TRUE(short_long_opt->has_argument());
EXPECT_EQ("foo", short_long_opt->argument());
EXPECT_TRUE(long_only_opt->is_set());
EXPECT_TRUE(long_only_opt->has_argument());
EXPECT_EQ("bar", long_only_opt->argument());
}
TEST(args, options_short_missing_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("-d").build();
EXPECT_FALSE(args->run(arg.c(), arg.v()));
std::stringstream ss;
args->print_error(ss);
EXPECT_EQ("foo: option requires an argument -- 'd'\n", ss.str());
}
TEST(args, options_short_unknown_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("-X").build();
EXPECT_FALSE(args->run(arg.c(), arg.v()));
std::stringstream ss;
args->print_error(ss);
EXPECT_EQ("foo: invalid option -- 'X'\n", ss.str());
}
TEST(args, options_long_missing_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("--form").build();
EXPECT_FALSE(args->run(arg.c(), arg.v()));
std::stringstream ss;
args->print_error(ss);
EXPECT_EQ("foo: option '--form' requires an argument\n", ss.str());
}
TEST(args, options_long_unsupported_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("--cold=feet").build();
EXPECT_FALSE(args->run(arg.c(), arg.v()));
std::stringstream ss;
args->print_error(ss);
EXPECT_EQ("foo: option '--cold' doesn't allow an argument\n", ss.str());
}
TEST(args, options_long_unknown_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("--experience").build();
EXPECT_FALSE(args->run(arg.c(), arg.v()));
std::stringstream ss;
args->print_error(ss);
EXPECT_EQ("foo: unrecognized option '--experience'\n", ss.str());
}
TEST(args, options_short_dash_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("-d").add("-").build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
EXPECT_TRUE(out.empty());
EXPECT_TRUE(short_only_req->is_set());
EXPECT_TRUE(short_only_req->has_argument());
EXPECT_EQ("-", short_only_req->argument());
}
TEST(args, options_long_dash_dash_value) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("--eat").add("--").build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
EXPECT_TRUE(out.empty());
EXPECT_TRUE(short_long_req->is_set());
EXPECT_TRUE(short_long_req->has_argument());
EXPECT_EQ("--", short_long_req->argument());
}
TEST(args, options_dash_dash) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo")
.add("--")
.add("-d")
.add("10")
.add("--eat=hamburger")
.add("--form")
.add("circle")
.build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
ASSERT_EQ(5, out.size());
EXPECT_EQ("-d", out[0]);
EXPECT_EQ("10", out[1]);
EXPECT_EQ("--eat=hamburger", out[2]);
EXPECT_EQ("--form", out[3]);
EXPECT_EQ("circle", out[4]);
EXPECT_FALSE(short_only_req->is_set());
EXPECT_FALSE(short_long_req->is_set());
EXPECT_FALSE(long_only_req->is_set());
}
TEST(args, options_dash_dash_end) {
auto args = Args::create();
SETUP_OPTIONS(args);
Builder builder;
auto arg = builder.add("foo").add("--").build();
std::vector<std::string_view> out;
EXPECT_TRUE(args->run(arg.c(), arg.v(), &out));
EXPECT_TRUE(out.empty());
}
TEST(args, help) {
auto args = Args::create();
SETUP_OPTIONS(args);
std::stringstream ss;
args->print_help(ss, 50);
EXPECT_EQ(R"(Mandatory arguments to long options are mandatory
for short options too.
-a an option
-b, --bold set font style to bold
--cold use if it is cold outside
-d ARG distance
-e, --eat=FOOD what to order, what to eat?
--form=ARG circle, shape or something
else?
-g
-h, --hold=[ARG]
--invert=[ARG]
)",
ss.str());
}
TEST(args, help_wide) {
auto args = Args::create();
SETUP_OPTIONS(args);
std::stringstream ss;
args->print_help(ss, 100);
EXPECT_EQ(
R"(Mandatory arguments to long options are mandatory for short options too.
-a an option
-b, --bold set font style to bold
--cold use if it is cold outside
-d ARG distance
-e, --eat=FOOD what to order, what to eat?
--form=ARG circle, shape or something else?
-g
-h, --hold=[ARG]
--invert=[ARG]
)",
ss.str());
}
TEST(args, help_narrow) {
auto args = Args::create();
SETUP_OPTIONS(args);
std::stringstream ss;
args->print_help(ss, 35);
EXPECT_EQ(R"(Mandatory arguments to long options
are mandatory for short options
too.
-a an option
-b, --bold set font style to
bold
--cold use if it is cold
outside
-d ARG distance
-e, --eat=FOOD
what to order, what to eat?
--form=ARG
circle, shape or something else?
-g
-h, --hold=[ARG]
--invert=[ARG]
)",
ss.str());
}
TEST(args, help_very_narrow) {
auto args = Args::create();
SETUP_OPTIONS(args);
std::stringstream ss;
args->print_help(ss, 20);
EXPECT_EQ(R"(Mandatory arguments
to long options are
mandatory for short
options too.
-a an option
-b, --bold
set font style to
bold
--cold
use if it is cold
outside
-d ARG distance
-e, --eat=FOOD
what to order, what
to eat?
--form=ARG
circle, shape or
something else?
-g
-h, --hold=[ARG]
--invert=[ARG]
)",
ss.str());
}
TEST(args, help_long_word) {
auto args = Args::create();
std::stringstream ss;
auto opt = args->option('a', "arg", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
args->print_help(ss, 20);
EXPECT_EQ(R"(Mandatory arguments
to long options are
mandatory for short
options too.
-a, --arg
aaaaaaaaaaaaaaaaaaa-
aaaaaaaaaaaaaaaaaaa
)",
ss.str());
}
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