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#ifdef WITH_MODULE
import argparse;
#else
#include <argparse/argparse.hpp>
#endif
#include <cmath>
#include <doctest.hpp>
using doctest::test_suite;
TEST_CASE("Parse positional arguments" * test_suite("positional_arguments")) {
argparse::ArgumentParser program("test");
program.add_argument("input");
program.add_argument("output");
program.parse_args({"test", "rocket.mesh", "thrust_profile.csv"});
REQUIRE(program.get("input") == "rocket.mesh");
REQUIRE(program.get("output") == "thrust_profile.csv");
}
TEST_CASE("Missing expected positional argument" *
test_suite("positional_arguments")) {
argparse::ArgumentParser program("test");
program.add_argument("input");
REQUIRE_THROWS_WITH_AS(program.parse_args({"test"}),
"input: 1 argument(s) expected. 0 provided.",
std::runtime_error);
}
TEST_CASE("Parse positional arguments with fixed nargs" *
test_suite("positional_arguments")) {
argparse::ArgumentParser program("test");
program.add_argument("input");
program.add_argument("output").nargs(2);
program.parse_args(
{"test", "rocket.mesh", "thrust_profile.csv", "output.mesh"});
REQUIRE(program.get("input") == "rocket.mesh");
auto outputs = program.get<std::vector<std::string>>("output");
REQUIRE(outputs.size() == 2);
REQUIRE(outputs[0] == "thrust_profile.csv");
REQUIRE(outputs[1] == "output.mesh");
}
TEST_CASE("Parse positional arguments with optional arguments" *
test_suite("positional_arguments")) {
argparse::ArgumentParser program("test");
program.add_argument("input");
program.add_argument("output").nargs(2);
program.add_argument("--num_iterations").scan<'i', int>();
program.parse_args({"test", "rocket.mesh", "--num_iterations", "15",
"thrust_profile.csv", "output.mesh"});
REQUIRE(program.get<int>("--num_iterations") == 15);
REQUIRE(program.get("input") == "rocket.mesh");
auto outputs = program.get<std::vector<std::string>>("output");
REQUIRE(outputs.size() == 2);
REQUIRE(outputs[0] == "thrust_profile.csv");
REQUIRE(outputs[1] == "output.mesh");
}
TEST_CASE("Parse positional arguments with optional arguments in the middle" *
test_suite("positional_arguments")) {
argparse::ArgumentParser program("test");
program.add_argument("input");
program.add_argument("output").nargs(2);
program.add_argument("--num_iterations").scan<'i', int>();
REQUIRE_THROWS(
program.parse_args({"test", "rocket.mesh", "thrust_profile.csv",
"--num_iterations", "15", "output.mesh"}));
}
TEST_CASE("Parse positional nargs=1..2 arguments" *
test_suite("positional_arguments")) {
GIVEN("a program that accepts an optional argument and nargs=1..2 positional "
"arguments") {
argparse::ArgumentParser program("test");
program.add_argument("-o");
program.add_argument("input").nargs(1, 2);
WHEN("provided no argument") {
THEN("the program does not accept it") {
REQUIRE_THROWS(program.parse_args({"test"}));
}
}
WHEN("provided 1 argument") {
THEN("the program accepts it") {
REQUIRE_NOTHROW(program.parse_args({"test", "a.c"}));
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 1);
REQUIRE(inputs[0] == "a.c");
}
}
WHEN("provided 2 arguments") {
THEN("the program accepts it") {
REQUIRE_NOTHROW(program.parse_args({"test", "a.c", "b.c"}));
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 2);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
}
}
WHEN("provided 3 arguments") {
THEN("the program does not accept it") {
REQUIRE_THROWS(program.parse_args({"test", "a.c", "b.c", "main.c"}));
}
}
WHEN("provided an optional followed by positional arguments") {
program.parse_args({"test", "-o", "a.out", "a.c", "b.c"});
THEN("the optional parameter consumes an argument") {
using namespace std::literals;
REQUIRE(program["-o"] == "a.out"s);
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 2);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
}
}
WHEN("provided an optional preceded by positional arguments") {
program.parse_args({"test", "a.c", "b.c", "-o", "a.out"});
THEN("the optional parameter consumes an argument") {
using namespace std::literals;
REQUIRE(program["-o"] == "a.out"s);
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 2);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
}
}
WHEN("provided an optional in between positional arguments") {
THEN("the program does not accept it") {
REQUIRE_THROWS(
program.parse_args({"test", "a.c", "-o", "a.out", "b.c"}));
}
}
}
}
TEST_CASE("Parse positional nargs=ANY arguments" *
test_suite("positional_arguments")) {
GIVEN("a program that accepts an optional argument and nargs=ANY positional "
"arguments") {
argparse::ArgumentParser program("test");
program.add_argument("-o");
program.add_argument("input").nargs(argparse::nargs_pattern::any);
WHEN("provided no argument") {
THEN("the program accepts it and gets empty container") {
REQUIRE_NOTHROW(program.parse_args({"test"}));
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 0);
}
}
WHEN("provided an optional followed by positional arguments") {
program.parse_args({"test", "-o", "a.out", "a.c", "b.c", "main.c"});
THEN("the optional parameter consumes an argument") {
using namespace std::literals;
REQUIRE(program["-o"] == "a.out"s);
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 3);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
REQUIRE(inputs[2] == "main.c");
}
}
WHEN("provided an optional preceded by positional arguments") {
program.parse_args({"test", "a.c", "b.c", "main.c", "-o", "a.out"});
THEN("the optional parameter consumes an argument") {
using namespace std::literals;
REQUIRE(program["-o"] == "a.out"s);
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 3);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
REQUIRE(inputs[2] == "main.c");
}
}
}
}
TEST_CASE("Parse remaining arguments deemed positional" *
test_suite("positional_arguments")) {
GIVEN("a program that accepts an optional argument and remaining arguments") {
argparse::ArgumentParser program("test");
program.add_argument("-o");
program.add_argument("input").remaining();
WHEN("provided no argument") {
THEN("the program accepts it but gets nothing") {
REQUIRE_NOTHROW(program.parse_args({"test"}));
REQUIRE_THROWS_AS(program.get<std::vector<std::string>>("input"),
std::logic_error);
}
}
WHEN("provided an optional followed by remaining arguments") {
program.parse_args({"test", "-o", "a.out", "a.c", "b.c", "main.c"});
THEN("the optional parameter consumes an argument") {
using namespace std::literals;
REQUIRE(program["-o"] == "a.out"s);
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 3);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
REQUIRE(inputs[2] == "main.c");
}
}
WHEN("provided remaining arguments including optional arguments") {
program.parse_args({"test", "a.c", "b.c", "main.c", "-o", "a.out"});
THEN("the optional argument is deemed remaining") {
REQUIRE_THROWS_AS(program.get("-o"), std::logic_error);
auto inputs = program.get<std::vector<std::string>>("input");
REQUIRE(inputs.size() == 5);
REQUIRE(inputs[0] == "a.c");
REQUIRE(inputs[1] == "b.c");
REQUIRE(inputs[2] == "main.c");
REQUIRE(inputs[3] == "-o");
REQUIRE(inputs[4] == "a.out");
}
}
}
}
TEST_CASE("Reversed order nargs is not allowed" *
test_suite("positional_arguments")) {
argparse::ArgumentParser program("test");
REQUIRE_THROWS_AS(program.add_argument("output").nargs(2, 1),
std::logic_error);
}
TEST_CASE("Square a number" * test_suite("positional_arguments")) {
argparse::ArgumentParser program;
program.add_argument("--verbose", "-v")
.help("enable verbose logging")
.default_value(false)
.implicit_value(true);
program.add_argument("square")
.help("display a square of a given number")
.action(
[](const std::string &value) { return pow(std::stoi(value), 2); });
program.parse_args({"./main", "15"});
REQUIRE(program.get<double>("square") == 225);
}
TEST_CASE("At_least_one_followed_by_exactly_one" * test_suite("positional_arguments")) {
GIVEN("a program that accepts a positional argument with at_least_one cardinality followed by another positional argument with 1:1") {
argparse::ArgumentParser program;
std::vector<std::string> at_least_one;
program.add_argument("at_least_one")
.nargs(argparse::nargs_pattern::at_least_one)
.store_into(at_least_one);
std::string exactly_one;
program.add_argument("exactly_one")
.store_into(exactly_one);
WHEN("provided one, two") {
THEN("parse_args works") {
program.parse_args({"./main", "one", "two"});
REQUIRE(at_least_one == std::vector<std::string>{"one"});
REQUIRE(exactly_one == "two");
}
}
WHEN("provided one, two, three") {
THEN("parse_args works") {
program.parse_args({"./main", "one", "two", "three"});
REQUIRE(at_least_one == std::vector<std::string>{"one", "two"});
REQUIRE(exactly_one == "three");
}
}
WHEN("provided one, two") {
THEN("parse_args throws") {
REQUIRE_THROWS(program.parse_args({"./main", "one"}));
}
}
}
}
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