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test.cxx
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/* Copyright © 2016-2017 Taylor C. Richberger <[email protected]> and Pavel Belikov
* This code is released under the license described in the LICENSE file
*/
#include <tuple>
#include <iostream>
std::istream& operator>>(std::istream& is, std::tuple<int, int>& ints)
{
is >> std::get<0>(ints);
is.get();
is >> std::get<1>(ints);
return is;
}
#include <args.hxx>
#define CATCH_CONFIG_MAIN
#include "catch.hpp"
TEST_CASE("Help flag throws Help exception", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::HelpFlag help(parser, "help", "Display this help menu", {'h', "help"});
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--help"}), args::Help);
}
TEST_CASE("Unknown flags throw exceptions", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::HelpFlag help(parser, "help", "Display this help menu", {'h', "help"});
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--Help"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-H"}), args::ParseError);
}
TEST_CASE("Boolean flags work as expected, with clustering", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Flag foo(parser, "FOO", "test flag", {'f', "foo"});
args::Flag bar(parser, "BAR", "test flag", {'b', "bar"});
args::Flag baz(parser, "BAZ", "test flag", {'a', "baz"});
args::Flag bix(parser, "BAZ", "test flag", {'x', "bix"});
parser.ParseArgs(std::vector<std::string>{"--baz", "-fb"});
REQUIRE(foo);
REQUIRE(bar);
REQUIRE(baz);
REQUIRE_FALSE(bix);
}
TEST_CASE("Count flag works as expected", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::CounterFlag foo(parser, "FOO", "test flag", {'f', "foo"});
args::CounterFlag bar(parser, "BAR", "test flag", {'b', "bar"}, 7);
args::CounterFlag baz(parser, "BAZ", "test flag", {'z', "baz"}, 7);
parser.ParseArgs(std::vector<std::string>{"--foo", "-fb", "--bar", "-b", "-f", "--foo"});
REQUIRE(foo);
REQUIRE(bar);
REQUIRE_FALSE(baz);
REQUIRE(args::get(foo) == 4);
REQUIRE(args::get(bar) == 10);
REQUIRE(args::get(baz) == 7);
}
TEST_CASE("Argument flags work as expected, with clustering", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlag<std::string> foo(parser, "FOO", "test flag", {'f', "foo"});
args::Flag bar(parser, "BAR", "test flag", {'b', "bar"});
args::ValueFlag<double> baz(parser, "BAZ", "test flag", {'a', "baz"});
args::ValueFlag<char> bim(parser, "BAZ", "test flag", {'B', "bim"});
args::Flag bix(parser, "BAZ", "test flag", {'x', "bix"});
parser.ParseArgs(std::vector<std::string>{"-bftest", "--baz=7.555e2", "--bim", "c"});
REQUIRE(foo);
REQUIRE(args::get(foo) == "test");
REQUIRE(bar);
REQUIRE(baz);
REQUIRE((args::get(baz) > 755.49 && args::get(baz) < 755.51));
REQUIRE(bim);
REQUIRE(args::get(bim) == 'c');
REQUIRE_FALSE(bix);
}
TEST_CASE("Passing an argument to a non-argument flag throws an error", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Flag bar(parser, "BAR", "test flag", {'b', "bar"});
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar=test"}), args::ParseError);
}
TEST_CASE("Unified argument lists for match work", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlag<std::string> foo(parser, "FOO", "test flag", {'f', "foo"});
args::Flag bar(parser, "BAR", "test flag", {"bar", 'b'});
args::ValueFlag<double> baz(parser, "BAZ", "test flag", {'a', "baz"});
args::ValueFlag<char> bim(parser, "BAZ", "test flag", {'B', "bim"});
args::Flag bix(parser, "BAZ", "test flag", {"bix"});
parser.ParseArgs(std::vector<std::string>{"-bftest", "--baz=7.555e2", "--bim", "c"});
REQUIRE(foo);
REQUIRE(args::get(foo) == "test");
REQUIRE(bar);
REQUIRE(baz);
REQUIRE((args::get(baz) > 755.49 && args::get(baz) < 755.51));
REQUIRE(bim);
REQUIRE(args::get(bim) == 'c');
REQUIRE_FALSE(bix);
}
TEST_CASE("Get can be assigned to for non-reference types", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlag<std::string> foo(parser, "FOO", "test flag", {'f', "foo"});
parser.ParseArgs(std::vector<std::string>{"--foo=test"});
REQUIRE(foo);
REQUIRE(args::get(foo) == "test");
args::get(foo) = "bar";
REQUIRE(args::get(foo) == "bar");
}
TEST_CASE("Invalid argument parsing throws parsing exceptions", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlag<int> foo(parser, "FOO", "test flag", {'f', "foo"});
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--foo=7.5"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--foo", "7a"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--foo", "7e4"}), args::ParseError);
}
TEST_CASE("Argument flag lists work as expected", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlagList<int> foo(parser, "FOO", "test flag", {'f', "foo"});
parser.ParseArgs(std::vector<std::string>{"--foo=7", "-f2", "-f", "9", "--foo", "42"});
REQUIRE((args::get(foo) == std::vector<int>{7, 2, 9, 42}));
}
#include <unordered_set>
TEST_CASE("Argument flag lists work with sets", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlagList<std::string, std::unordered_set> foo(parser, "FOO", "test flag", {'f', "foo"});
parser.ParseArgs(std::vector<std::string>{"--foo=7", "-fblah", "-f", "9", "--foo", "blah"});
REQUIRE((args::get(foo) == std::unordered_set<std::string>{"7", "9", "blah"}));
}
TEST_CASE("Positional arguments and positional argument lists work as expected", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Positional<std::string> foo(parser, "FOO", "test flag");
args::Positional<bool> bar(parser, "BAR", "test flag");
args::PositionalList<char> baz(parser, "BAZ", "test flag");
parser.ParseArgs(std::vector<std::string>{"this is a test flag", "0", "a", "b", "c", "x", "y", "z"});
REQUIRE(foo);
REQUIRE((args::get(foo) == "this is a test flag"));
REQUIRE(bar);
REQUIRE(!args::get(bar));
REQUIRE(baz);
REQUIRE((args::get(baz) == std::vector<char>{'a', 'b', 'c', 'x', 'y', 'z'}));
}
TEST_CASE("The option terminator works as expected", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Positional<std::string> foo(parser, "FOO", "test flag");
args::Positional<bool> bar(parser, "BAR", "test flag");
args::PositionalList<std::string> baz(parser, "BAZ", "test flag");
args::Flag ofoo(parser, "FOO", "test flag", {'f', "foo"});
args::Flag obar(parser, "BAR", "test flag", {"bar", 'b'});
args::ValueFlag<double> obaz(parser, "BAZ", "test flag", {'a', "baz"});
parser.ParseArgs(std::vector<std::string>{"--foo", "this is a test flag", "0", "a", "b", "--baz", "7.0", "c", "x", "y", "z"});
REQUIRE(foo);
REQUIRE((args::get(foo) == "this is a test flag"));
REQUIRE(bar);
REQUIRE(!args::get(bar));
REQUIRE(baz);
REQUIRE((args::get(baz) == std::vector<std::string>{"a", "b", "c", "x", "y", "z"}));
REQUIRE(ofoo);
REQUIRE(!obar);
REQUIRE(obaz);
parser.ParseArgs(std::vector<std::string>{"--foo", "this is a test flag", "0", "a", "--", "b", "--baz", "7.0", "c", "x", "y", "z"});
REQUIRE(foo);
REQUIRE((args::get(foo) == "this is a test flag"));
REQUIRE(bar);
REQUIRE(!args::get(bar));
REQUIRE(baz);
REQUIRE((args::get(baz) == std::vector<std::string>{"a", "b", "--baz", "7.0", "c", "x", "y", "z"}));
REQUIRE(ofoo);
REQUIRE(!obar);
REQUIRE(!obaz);
parser.ParseArgs(std::vector<std::string>{"--foo", "--", "this is a test flag", "0", "a", "b", "--baz", "7.0", "c", "x", "y", "z"});
REQUIRE(foo);
REQUIRE((args::get(foo) == "this is a test flag"));
REQUIRE(bar);
REQUIRE(!args::get(bar));
REQUIRE(baz);
REQUIRE((args::get(baz) == std::vector<std::string>{"a", "b", "--baz", "7.0", "c", "x", "y", "z"}));
REQUIRE(ofoo);
REQUIRE(!obar);
REQUIRE(!obaz);
}
TEST_CASE("Positional lists work with sets", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::PositionalList<std::string, std::unordered_set> foo(parser, "FOO", "test positional");
parser.ParseArgs(std::vector<std::string>{"foo", "FoO", "bar", "baz", "foo", "9", "baz"});
REQUIRE((args::get(foo) == std::unordered_set<std::string>{"foo", "FoO", "bar", "baz", "9"}));
}
TEST_CASE("Positionals that are unspecified evaluate false", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Positional<std::string> foo(parser, "FOO", "test flag");
args::Positional<bool> bar(parser, "BAR", "test flag");
args::PositionalList<char> baz(parser, "BAZ", "test flag");
parser.ParseArgs(std::vector<std::string>{"this is a test flag again"});
REQUIRE(foo);
REQUIRE((args::get(foo) == "this is a test flag again"));
REQUIRE_FALSE(bar);
REQUIRE_FALSE(baz);
}
TEST_CASE("Additional positionals throw an exception", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Positional<std::string> foo(parser, "FOO", "test flag");
args::Positional<bool> bar(parser, "BAR", "test flag");
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"this is a test flag again", "1", "this has no positional available"}), args::ParseError);
}
TEST_CASE("Argument groups should throw when validation fails", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Group xorgroup(parser, "this group provides xor validation", args::Group::Validators::Xor);
args::Flag a(xorgroup, "a", "test flag", {'a'});
args::Flag b(xorgroup, "b", "test flag", {'b'});
args::Flag c(xorgroup, "c", "test flag", {'c'});
args::Group nxor(parser, "this group provides all-or-none (nxor) validation", args::Group::Validators::AllOrNone);
args::Flag d(nxor, "d", "test flag", {'d'});
args::Flag e(nxor, "e", "test flag", {'e'});
args::Flag f(nxor, "f", "test flag", {'f'});
args::Group atleastone(parser, "this group provides at-least-one validation", args::Group::Validators::AtLeastOne);
args::Flag g(atleastone, "g", "test flag", {'g'});
args::Flag h(atleastone, "h", "test flag", {'h'});
// Needs g or h
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a"}), args::ValidationError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-g", "-a"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-h", "-a"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-gh", "-a"}));
// Xor stuff
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g"}), args::ValidationError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-h", "-b"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g", "-ab"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g", "-ac"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g", "-abc"}), args::ValidationError);
// Nxor stuff
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-h", "-a"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-h", "-adef"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g", "-ad"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g", "-adf"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g", "-aef"}), args::ValidationError);
}
TEST_CASE("Argument groups should nest", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::Group xorgroup(parser, "this group provides xor validation", args::Group::Validators::Xor);
args::Flag a(xorgroup, "a", "test flag", {'a'});
args::Flag b(xorgroup, "b", "test flag", {'b'});
args::Flag c(xorgroup, "c", "test flag", {'c'});
args::Group nxor(xorgroup, "this group provides all-or-none (nxor) validation", args::Group::Validators::AllOrNone);
args::Flag d(nxor, "d", "test flag", {'d'});
args::Flag e(nxor, "e", "test flag", {'e'});
args::Flag f(nxor, "f", "test flag", {'f'});
args::Group atleastone(xorgroup, "this group provides at-least-one validation", args::Group::Validators::AtLeastOne);
args::Flag g(atleastone, "g", "test flag", {'g'});
args::Flag h(atleastone, "h", "test flag", {'h'});
// Nothing actually matches, because nxor validates properly when it's empty,
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-a", "-d"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-c", "-f"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-de", "-f"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-gh", "-f"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-g"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-b"}), args::ValidationError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a", "-dg"}), args::ValidationError);
}
struct DoublesReader
{
void operator()(const std::string &, const std::string &value, std::tuple<double, double> &destination)
{
size_t commapos = 0;
std::get<0>(destination) = std::stod(value, &commapos);
std::get<1>(destination) = std::stod(std::string(value, commapos + 1));
}
};
TEST_CASE("Custom types work", "[args]")
{
{
args::ArgumentParser parser("This is a test program.");
args::Positional<std::tuple<int, int>> ints(parser, "INTS", "This takes a pair of integers.");
args::Positional<std::tuple<double, double>, DoublesReader> doubles(parser, "DOUBLES", "This takes a pair of doubles.");
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"1.2,2", "3.8,4"}), args::ParseError);
}
args::ArgumentParser parser("This is a test program.");
args::Positional<std::tuple<int, int>> ints(parser, "INTS", "This takes a pair of integers.");
args::Positional<std::tuple<double, double>, DoublesReader> doubles(parser, "DOUBLES", "This takes a pair of doubles.");
parser.ParseArgs(std::vector<std::string>{"1,2", "3.8,4"});
REQUIRE(std::get<0>(args::get(ints)) == 1);
REQUIRE(std::get<1>(args::get(ints)) == 2);
REQUIRE((std::get<0>(args::get(doubles)) > 3.79 && std::get<0>(args::get(doubles)) < 3.81));
REQUIRE((std::get<1>(args::get(doubles)) > 3.99 && std::get<1>(args::get(doubles)) < 4.01));
}
TEST_CASE("Custom parser prefixes (dd-style)", "[args]")
{
args::ArgumentParser parser("This command likes to break your disks");
parser.LongPrefix("");
parser.LongSeparator("=");
args::HelpFlag help(parser, "HELP", "Show this help menu.", {"help"});
args::ValueFlag<long> bs(parser, "BYTES", "Block size", {"bs"}, 512);
args::ValueFlag<long> skip(parser, "BYTES", "Bytes to skip", {"skip"}, 0);
args::ValueFlag<std::string> input(parser, "BLOCK SIZE", "Block size", {"if"});
args::ValueFlag<std::string> output(parser, "BLOCK SIZE", "Block size", {"of"});
parser.ParseArgs(std::vector<std::string>{"skip=8", "if=/dev/null"});
REQUIRE_FALSE(bs);
REQUIRE(args::get(bs) == 512);
REQUIRE(skip);
REQUIRE(args::get(skip) == 8);
REQUIRE(input);
REQUIRE(args::get(input) == "/dev/null");
REQUIRE_FALSE(output);
}
TEST_CASE("Custom parser prefixes (Some Windows styles)", "[args]")
{
args::ArgumentParser parser("This command likes to break your disks");
parser.LongPrefix("/");
parser.LongSeparator(":");
args::HelpFlag help(parser, "HELP", "Show this help menu.", {"help"});
args::ValueFlag<long> bs(parser, "BYTES", "Block size", {"bs"}, 512);
args::ValueFlag<long> skip(parser, "BYTES", "Bytes to skip", {"skip"}, 0);
args::ValueFlag<std::string> input(parser, "BLOCK SIZE", "Block size", {"if"});
args::ValueFlag<std::string> output(parser, "BLOCK SIZE", "Block size", {"of"});
parser.ParseArgs(std::vector<std::string>{"/skip:8", "/if:/dev/null"});
REQUIRE_FALSE(bs);
REQUIRE(args::get(bs) == 512);
REQUIRE(skip);
REQUIRE(args::get(skip) == 8);
REQUIRE(input);
REQUIRE(args::get(input) == "/dev/null");
REQUIRE_FALSE(output);
}
TEST_CASE("Help menu can be grabbed as a string, passed into a stream, or by using the overloaded stream operator", "[args]")
{
std::ostream null(nullptr);
args::ArgumentParser parser("This command likes to break your disks");
args::HelpFlag help(parser, "HELP", "Show this help menu.", {"help"});
args::ValueFlag<long> bs(parser, "BYTES", "Block size", {"bs"}, 512);
args::ValueFlag<long> skip(parser, "BYTES", "Bytes to skip", {"skip"}, 0);
args::ValueFlag<std::string> input(parser, "BLOCK SIZE", "Block size", {"if"});
args::ValueFlag<std::string> output(parser, "BLOCK SIZE", "Block size", {"of"});
parser.ParseArgs(std::vector<std::string>{"--skip=8", "--if=/dev/null"});
null << parser.Help();
parser.Help(null);
null << parser;
}
TEST_CASE("Required argument separation being violated throws an error", "[args]")
{
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::ValueFlag<std::string> bar(parser, "BAR", "test flag", {'b', "bar"});
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-btest"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"--bar=test"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-b", "test"}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"--bar", "test"}));
parser.SetArgumentSeparations(true, false, false, false);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-btest"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar=test"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-b", "test"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar", "test"}), args::ParseError);
parser.SetArgumentSeparations(false, true, false, false);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-btest"}), args::ParseError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"--bar=test"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-b", "test"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar", "test"}), args::ParseError);
parser.SetArgumentSeparations(false, false, true, false);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-btest"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar=test"}), args::ParseError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-b", "test"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar", "test"}), args::ParseError);
parser.SetArgumentSeparations(false, false, false, true);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-btest"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--bar=test"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-b", "test"}), args::ParseError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"--bar", "test"}));
}
enum class MappingEnum
{
def,
foo,
bar,
red,
yellow,
green
};
#include <unordered_map>
#include <algorithm>
#include <string>
struct ToLowerReader
{
void operator()(const std::string &, const std::string &value, std::string &destination)
{
destination = value;
std::transform(destination.begin(), destination.end(), destination.begin(), [](char c) -> char { return static_cast<char>(tolower(c)); });
}
};
TEST_CASE("Mapping types work as needed", "[args]")
{
std::unordered_map<std::string, MappingEnum> map{
{"default", MappingEnum::def},
{"foo", MappingEnum::foo},
{"bar", MappingEnum::bar},
{"red", MappingEnum::red},
{"yellow", MappingEnum::yellow},
{"green", MappingEnum::green}};
args::ArgumentParser parser("This is a test program.", "This goes after the options.");
args::MapFlag<std::string, MappingEnum> dmf(parser, "DMF", "Maps string to an enum", {"dmf"}, map);
args::MapFlag<std::string, MappingEnum> mf(parser, "MF", "Maps string to an enum", {"mf"}, map);
args::MapFlag<std::string, MappingEnum, ToLowerReader> cimf(parser, "CIMF", "Maps string to an enum case-insensitively", {"cimf"}, map);
args::MapFlagList<std::string, MappingEnum> mfl(parser, "MFL", "Maps string to an enum list", {"mfl"}, map);
args::MapPositional<std::string, MappingEnum> mp(parser, "MP", "Maps string to an enum", map);
args::MapPositionalList<std::string, MappingEnum> mpl(parser, "MPL", "Maps string to an enum list", map);
parser.ParseArgs(std::vector<std::string>{"--mf=red", "--cimf=YeLLoW", "--mfl=bar", "foo", "--mfl=green", "red", "--mfl", "bar", "default"});
REQUIRE_FALSE(dmf);
REQUIRE(args::get(dmf) == MappingEnum::def);
REQUIRE(mf);
REQUIRE(args::get(mf) == MappingEnum::red);
REQUIRE(cimf);
REQUIRE(args::get(cimf) == MappingEnum::yellow);
REQUIRE(mfl);
REQUIRE((args::get(mfl) == std::vector<MappingEnum>{MappingEnum::bar, MappingEnum::green, MappingEnum::bar}));
REQUIRE(mp);
REQUIRE((args::get(mp) == MappingEnum::foo));
REQUIRE(mpl);
REQUIRE((args::get(mpl) == std::vector<MappingEnum>{MappingEnum::red, MappingEnum::def}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--mf=YeLLoW"}), args::MapError);
}
TEST_CASE("An exception should be thrown when a single-argument flag is matched multiple times and the constructor option is specified", "[args]")
{
std::unordered_map<std::string, MappingEnum> map{
{"default", MappingEnum::def},
{"foo", MappingEnum::foo},
{"bar", MappingEnum::bar},
{"red", MappingEnum::red},
{"yellow", MappingEnum::yellow},
{"green", MappingEnum::green}};
args::ArgumentParser parser("Test command");
args::Flag foo(parser, "Foo", "Foo", {'f', "foo"}, true);
args::ValueFlag<std::string> bar(parser, "Bar", "Bar", {'b', "bar"}, "", true);
args::Flag bix(parser, "Bix", "Bix", {'x', "bix"});
args::MapFlag<std::string, MappingEnum> baz(parser, "Baz", "Baz", {'B', "baz"}, map, MappingEnum::def, true);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--foo", "-f", "-bblah"}), args::ExtraError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"--foo", "-xxx", "--bix", "-bblah", "--bix"}));
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--foo", "-bblah", "-blah"}), args::ExtraError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--foo", "-bblah", "--bar", "blah"}), args::ExtraError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--baz=red", "-B", "yellow"}), args::ExtraError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"--baz", "red", "-Byellow"}), args::ExtraError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"--foo", "-Bgreen"}));
REQUIRE(foo);
REQUIRE_FALSE(bar);
REQUIRE_FALSE(bix);
REQUIRE(baz);
REQUIRE(args::get(baz) == MappingEnum::green);
}
TEST_CASE("Sub-parsers should work through kick-out", "[args]")
{
std::unordered_map<std::string, MappingEnum> map{
{"default", MappingEnum::def},
{"foo", MappingEnum::foo},
{"bar", MappingEnum::bar},
{"red", MappingEnum::red},
{"yellow", MappingEnum::yellow},
{"green", MappingEnum::green}};
const std::vector<std::string> args{"--foo", "green", "--bar"};
args::ArgumentParser parser1("Test command");
args::Flag foo1(parser1, "Foo", "Foo", {'f', "foo"});
args::Flag bar1(parser1, "Bar", "Bar", {'b', "bar"});
args::MapPositional<std::string, MappingEnum> sub(parser1, "sub", "sub", map);
sub.KickOut(true);
auto next = parser1.ParseArgs(args);
args::ArgumentParser parser2("Test command");
args::Flag foo2(parser2, "Foo", "Foo", {'f', "foo"});
args::Flag bar2(parser2, "Bar", "Bar", {'b', "bar"});
parser2.ParseArgs(next, std::end(args));
REQUIRE(foo1);
REQUIRE_FALSE(bar1);
REQUIRE(sub);
REQUIRE(args::get(sub) == MappingEnum::green);
REQUIRE_FALSE(foo2);
REQUIRE(bar2);
}
TEST_CASE("Kick-out should work via all flags and value flags", "[args]")
{
const std::vector<std::string> args{"-a", "-b", "--foo", "-ca", "--bar", "barvalue", "-db"};
args::ArgumentParser parser1("Test command");
args::Flag a1(parser1, "a", "a", {'a'});
args::Flag b1(parser1, "b", "b", {'b'});
args::Flag c1(parser1, "c", "c", {'c'});
args::Flag d1(parser1, "d", "d", {'d'});
args::Flag foo(parser1, "foo", "foo", {'f', "foo"});
foo.KickOut(true);
args::ArgumentParser parser2("Test command");
args::Flag a2(parser2, "a", "a", {'a'});
args::Flag b2(parser2, "b", "b", {'b'});
args::Flag c2(parser2, "c", "c", {'c'});
args::Flag d2(parser2, "d", "d", {'d'});
args::ValueFlag<std::string> bar(parser2, "bar", "bar", {'B', "bar"});
bar.KickOut(true);
args::ArgumentParser parser3("Test command");
args::Flag a3(parser3, "a", "a", {'a'});
args::Flag b3(parser3, "b", "b", {'b'});
args::Flag c3(parser3, "c", "c", {'c'});
args::Flag d3(parser3, "d", "d", {'d'});
auto next = parser1.ParseArgs(args);
next = parser2.ParseArgs(next, std::end(args));
next = parser3.ParseArgs(next, std::end(args));
REQUIRE(next == std::end(args));
REQUIRE(a1);
REQUIRE(b1);
REQUIRE_FALSE(c1);
REQUIRE_FALSE(d1);
REQUIRE(foo);
REQUIRE(a2);
REQUIRE_FALSE(b2);
REQUIRE(c2);
REQUIRE_FALSE(d2);
REQUIRE(bar);
REQUIRE(args::get(bar) == "barvalue");
REQUIRE_FALSE(a3);
REQUIRE(b3);
REQUIRE_FALSE(c3);
REQUIRE(d3);
}
TEST_CASE("Required flags work as expected", "[args]")
{
args::ArgumentParser parser1("Test command");
args::ValueFlag<int> foo(parser1, "foo", "foo", {'f', "foo"}, args::Options::Required);
args::ValueFlag<int> bar(parser1, "bar", "bar", {'b', "bar"});
parser1.ParseArgs(std::vector<std::string>{"-f", "42"});
REQUIRE(foo.Get() == 42);
REQUIRE_THROWS_AS(parser1.ParseArgs(std::vector<std::string>{"-b4"}), args::RequiredError);
args::ArgumentParser parser2("Test command");
args::Positional<int> pos1(parser2, "a", "a");
REQUIRE_NOTHROW(parser2.ParseArgs(std::vector<std::string>{}));
args::ArgumentParser parser3("Test command");
args::Positional<int> pos2(parser3, "a", "a", args::Options::Required);
REQUIRE_THROWS_AS(parser3.ParseArgs(std::vector<std::string>{}), args::RequiredError);
}
TEST_CASE("Hidden options are excluded from help", "[args]")
{
args::ArgumentParser parser1("");
args::ValueFlag<int> foo(parser1, "foo", "foo", {'f', "foo"}, args::Options::Hidden);
args::ValueFlag<int> bar(parser1, "bar", "bar", {'b'});
args::Group group(parser1, "group");
args::ValueFlag<int> foo1(group, "foo", "foo", {'f', "foo"}, args::Options::Hidden);
args::ValueFlag<int> bar2(group, "bar", "bar", {'b'});
auto desc = parser1.GetDescription(parser1.helpParams, 0);
REQUIRE(desc.size() == 3);
REQUIRE(std::get<0>(desc[0]) == "-b[bar]");
REQUIRE(std::get<0>(desc[1]) == "group");
REQUIRE(std::get<0>(desc[2]) == "-b[bar]");
}
TEST_CASE("Implicit values work as expected", "[args]")
{
args::ArgumentParser parser("Test command");
args::ImplicitValueFlag<int> j(parser, "parallel", "parallel", {'j', "parallel"}, 0, 1);
args::Flag foo(parser, "FOO", "test flag", {'f', "foo"});
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-j"}));
REQUIRE(args::get(j) == 0);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-j4"}));
REQUIRE(args::get(j) == 4);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-j", "4"}));
REQUIRE(args::get(j) == 4);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-j", "-f"}));
REQUIRE(args::get(j) == 0);
REQUIRE(foo);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-f"}));
REQUIRE(args::get(j) == 1);
REQUIRE_FALSE(j);
}
TEST_CASE("Nargs work as expected", "[args]")
{
args::ArgumentParser parser("Test command");
args::NargsValueFlag<int> a(parser, "", "", {'a'}, 2);
args::NargsValueFlag<int> b(parser, "", "", {'b'}, {2, 3});
args::NargsValueFlag<std::string> c(parser, "", "", {'c'}, {0, 2});
args::NargsValueFlag<int> d(parser, "", "", {'d'}, {1, 3});
args::Flag f(parser, "", "", {'f'});
REQUIRE_THROWS_AS(args::Nargs(3, 2), args::UsageError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-a", "1", "2"}));
REQUIRE((args::get(a) == std::vector<int>{1, 2}));
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-a", "1", "2", "-f"}));
REQUIRE((args::get(a) == std::vector<int>{1, 2}));
REQUIRE(args::get(f) == true);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a", "1"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a1"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a1", "2"}), args::ParseError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-b", "1", "2", "-f"}));
REQUIRE((args::get(b) == std::vector<int>{1, 2}));
REQUIRE(args::get(f) == true);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-b", "1", "2", "3"}));
REQUIRE((args::get(b) == std::vector<int>{1, 2, 3}));
REQUIRE(args::get(f) == false);
std::vector<int> vec;
for (int be : b)
{
vec.push_back(be);
}
REQUIRE((vec == std::vector<int>{1, 2, 3}));
vec.assign(std::begin(b), std::end(b));
REQUIRE((vec == std::vector<int>{1, 2, 3}));
parser.SetArgumentSeparations(true, true, false, false);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-a", "1", "2"}), args::ParseError);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-c", "-f"}));
REQUIRE(args::get(c).empty());
REQUIRE(args::get(f) == true);
REQUIRE_NOTHROW(parser.ParseArgs(std::vector<std::string>{"-cf"}));
REQUIRE((args::get(c) == std::vector<std::string>{"f"}));
REQUIRE(args::get(f) == false);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-d"}), args::ParseError);
REQUIRE_THROWS_AS(parser.ParseArgs(std::vector<std::string>{"-b"}), args::ParseError);
}
TEST_CASE("Simple commands work as expected", "[args]")
{
args::ArgumentParser p("git-like parser");
args::ValueFlag<std::string> gitdir(p, "path", "", {"git-dir"}, args::Options::Global);
args::HelpFlag h(p, "help", "help", {"help"}, args::Options::Global);
args::PositionalList<std::string> pathsList(p, "paths", "files to commit", args::Options::Global);
args::Command add(p, "add", "Add file contents to the index");
args::Command commit(p, "commit", "record changes to the repository");
p.RequireCommand(true);
p.ParseArgs(std::vector<std::string>{"add", "--git-dir", "A", "B", "C", "D"});
REQUIRE(add);
REQUIRE(!commit);
REQUIRE((args::get(pathsList) == std::vector<std::string>{"B", "C", "D"}));
REQUIRE(args::get(gitdir) == "A");
}
TEST_CASE("Subparser commands work as expected", "[args]")
{
args::Group globals;
args::ValueFlag<std::string> gitdir(globals, "path", "", {"git-dir"});
args::HelpFlag h(globals, "help", "help", {"help"});
args::ArgumentParser p("git-like parser");
args::GlobalOptions g(p, globals);
std::vector<std::string> paths;
args::Command add(p, "add", "Add file contents to the index", [&](args::Subparser &c)
{
args::PositionalList<std::string> pathsList(c, "paths", "files to add");
c.Parse();
paths.assign(std::begin(pathsList), std::end(pathsList));
});
args::Command commit(p, "commit", "record changes to the repository", [&](args::Subparser &c)
{
args::PositionalList<std::string> pathsList(c, "paths", "files to commit");
c.Parse();
paths.assign(std::begin(pathsList), std::end(pathsList));
});
p.RequireCommand(true);
p.ParseArgs(std::vector<std::string>{"add", "--git-dir", "A", "B", "C", "D"});
REQUIRE(add);
REQUIRE(!commit);
REQUIRE((paths == std::vector<std::string>{"B", "C", "D"}));
REQUIRE(args::get(gitdir) == "A");
}
TEST_CASE("Subparser commands with kick-out flags work as expected", "[args]")
{
args::ArgumentParser p("git-like parser");
std::vector<std::string> kickedOut;
args::Command add(p, "add", "Add file contents to the index", [&](args::Subparser &c)
{
args::Flag kickoutFlag(c, "kick-out", "kick-out flag", {'k'}, args::Options::KickOut);
c.Parse();
REQUIRE(kickoutFlag);
kickedOut = c.KickedOut();
});
p.ParseArgs(std::vector<std::string>{"add", "-k", "A", "B", "C", "D"});
REQUIRE(add);
REQUIRE((kickedOut == std::vector<std::string>{"A", "B", "C", "D"}));
}
TEST_CASE("Subparser help works as expected", "[args]")
{
args::ArgumentParser p("git-like parser");
args::Flag g(p, "GLOBAL", "global flag", {'g'}, args::Options::Global);
args::Command add(p, "add", "add file contents to the index", [&](args::Subparser &c)
{
args::Flag flag(c, "FLAG", "flag", {'f'});
c.Parse();
});
args::Command commit(p, "commit", "record changes to the repository", [&](args::Subparser &c)
{
args::Flag flag(c, "FLAG", "flag", {'f'});
c.Parse();
});
p.Prog("git");
p.RequireCommand(false);
std::ostringstream s;
auto d = p.GetDescription(p.helpParams, 0);
s << p;
REQUIRE(s.str() == R"( git [COMMAND] {OPTIONS}
git-like parser
OPTIONS:
-g global flag
add add file contents to the index
commit record changes to the repository
)");
p.ParseArgs(std::vector<std::string>{"add"});
s.str("");
s << p;
REQUIRE(s.str() == R"( git add {OPTIONS}
add file contents to the index
OPTIONS:
-f flag
)");
p.ParseArgs(std::vector<std::string>{});
s.str("");
s << p;
REQUIRE(s.str() == R"( git [COMMAND] {OPTIONS}
git-like parser
OPTIONS:
-g global flag
add add file contents to the index
commit record changes to the repository
)");
p.helpParams.showCommandChildren = true;
p.ParseArgs(std::vector<std::string>{});
s.str("");
s << p;
REQUIRE(s.str() == R"( git [COMMAND] {OPTIONS}
git-like parser
OPTIONS:
-g global flag
add add file contents to the index
-f flag
commit record changes to the repository
-f flag
)");
commit.Epilog("epilog");
p.helpParams.showCommandFullHelp = true;
p.ParseArgs(std::vector<std::string>{});
s.str("");
s << p;
REQUIRE(s.str() == R"( git [COMMAND] {OPTIONS}
git-like parser
OPTIONS:
-g global flag
add {OPTIONS}
add file contents to the index
-f flag
commit {OPTIONS}
record changes to the repository
-f flag
epilog
)");
}
TEST_CASE("Subparser validation works as expected", "[args]")
{
args::ArgumentParser p("parser");
args::Command a(p, "a", "command a", [](args::Subparser &s)
{
args::ValueFlag<std::string> f(s, "", "", {'f'}, args::Options::Required);
s.Parse();
});
args::Command b(p, "b", "command b");
args::ValueFlag<std::string> f(b, "", "", {'f'}, args::Options::Required);
args::Command c(p, "c", "command c", [](args::Subparser&){});
REQUIRE_THROWS_AS(p.ParseArgs(std::vector<std::string>{}), args::ValidationError);
REQUIRE_THROWS_AS(p.ParseArgs(std::vector<std::string>{"a"}), args::RequiredError);
REQUIRE_NOTHROW(p.ParseArgs(std::vector<std::string>{"a", "-f", "F"}));
REQUIRE_THROWS_AS(p.ParseArgs(std::vector<std::string>{"b"}), args::RequiredError);
REQUIRE_NOTHROW(p.ParseArgs(std::vector<std::string>{"b", "-f", "F"}));
p.RequireCommand(false);
REQUIRE_NOTHROW(p.ParseArgs(std::vector<std::string>{}));
REQUIRE_THROWS_AS(p.ParseArgs(std::vector<std::string>{"c"}), args::UsageError);
REQUIRE_THROWS_AS(p.ParseArgs(std::vector<std::string>{"unknown-command"}), args::ParseError);
}
TEST_CASE("Global options work as expected", "[args]")
{
args::Group globals;
args::Flag f(globals, "f", "f", {'f'});
args::ArgumentParser p("parser");
args::GlobalOptions g(p, globals);
args::Command a(p, "a", "command a");
args::Command b(p, "b", "command b");
p.RequireCommand(false);
REQUIRE_NOTHROW(p.ParseArgs(std::vector<std::string>{"-f"}));
REQUIRE_NOTHROW(p.ParseArgs(std::vector<std::string>{"a", "-f"}));
REQUIRE_NOTHROW(p.ParseArgs(std::vector<std::string>{"b", "-f"}));
}
TEST_CASE("GetProgramLine works as expected", "[args]")
{
args::ArgumentParser p("parser");
args::Flag g(p, "g", "g", {'g'}, args::Options::Global);
args::Flag hidden(p, "hidden", "hidden flag", {'h'}, args::Options::Hidden);
args::Command a(p, "a", "command a", [](args::Subparser &s)
{
args::ValueFlag<std::string> f(s, "STRING", "my f flag", {'f', "f-long"}, args::Options::Required);
args::Positional<std::string> pos(s, "positional", "positional", args::Options::Required);
s.Parse();
});
args::Command b(p, "b", "command b");
args::ValueFlag<std::string> f(b, "STRING", "my f flag", {'f'}, args::Options::Required);
args::Positional<std::string> pos(b, "positional", "positional");
auto line = [&](args::Command &element)
{
p.Reset();
auto strings = element.GetCommandProgramLine(p.helpParams);
std::string res;
for (const std::string &s: strings)
{
if (!res.empty())
{
res += ' ';
}
res += s;
}
return res;
};
REQUIRE(line(p) == "COMMAND {OPTIONS}");
REQUIRE(line(a) == "a positional {OPTIONS}");
REQUIRE(line(b) == "b [positional] {OPTIONS}");
p.helpParams.proglineShowFlags = true;
REQUIRE(line(p) == "COMMAND [-g]");
REQUIRE(line(a) == "a --f-long <STRING> positional");
REQUIRE(line(b) == "b -f <STRING> [positional]");
p.helpParams.proglinePreferShortFlags = true;
REQUIRE(line(p) == "COMMAND [-g]");
REQUIRE(line(a) == "a -f <STRING> positional");
REQUIRE(line(b) == "b -f <STRING> [positional]");
}
TEST_CASE("Program line wrapping works as expected", "[args]")
{
args::ArgumentParser p("parser");
args::ValueFlag<std::string> f(p, "foo_name", "f", {"foo"});
args::ValueFlag<std::string> g(p, "bar_name", "b", {"bar"});
args::ValueFlag<std::string> z(p, "baz_name", "z", {"baz"});
p.helpParams.proglineShowFlags = true;
p.helpParams.width = 42;
p.Prog("parser");
p.ProglinePostfix("\na\nliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiine line2 line2tail");
REQUIRE((p.GetProgramLine(p.helpParams) == std::vector<std::string>{
"[--foo <foo_name>]",
"[--bar <bar_name>]",
"[--baz <baz_name>]",
"\n",
"a",
"\n",
"liiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiine",
"line2",
"line2tail",
}));
std::ostringstream s;
s << p;
REQUIRE(s.str() == R"( parser [--foo <foo_name>]
[--bar <bar_name>]
[--baz <baz_name>]
a
liiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiine
line2 line2tail
parser
OPTIONS:
--foo=[foo_name] f
--bar=[bar_name] b
--baz=[baz_name] z