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CLI11/tests/OptionalTest.cpp
Philip Top eab92ed988 modified option template (#285)
* add some tests with default capture on the two parameter template and some notes about it in the README.md

remove the test from visual studio 2015
vs2015 doesn't seem to properly deal with is_assignable in the cases we care about so make a standalone version that is more direct in what we are doing

add version to appveyor and add some notes to the readme

fix a few test cases to make sure code is covered and test a few other paths

remove unneeded enum streaming operator

add some diagnostic escapes around trait code to eliminate gcc Wnarrowing warnings

work specification of the template operations

remove optional add some templates for options conversions

add the two parameter template for add_option

* Fix some comments from Code review and add more description

* fix case when string_view doesn't work to append to a string.

* This PR also addressed #300

* modify lexical_cast to take  const std::string &, instead of by value to allow string_view in a few cases
2019-07-29 00:19:35 -04:00

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#include <cstdlib>
#include <iostream>
#include "app_helper.hpp"
// You can explicitly enable or disable support
// by defining to 1 or 0. Extra check here to ensure it's in the stdlib too.
// We nest the check for __has_include and it's usage
#ifndef CLI11_STD_OPTIONAL
#ifdef __has_include
#if defined(CLI11_CPP17) && __has_include(<optional>)
#define CLI11_STD_OPTIONAL 1
#else
#define CLI11_STD_OPTIONAL 0
#endif
#else
#define CLI11_STD_OPTIONAL 0
#endif
#endif
#ifndef CLI11_EXPERIMENTAL_OPTIONAL
#define CLI11_EXPERIMENTAL_OPTIONAL 0
#endif
#ifndef CLI11_BOOST_OPTIONAL
#define CLI11_BOOST_OPTIONAL 0
#endif
#if CLI11_BOOST_OPTIONAL
#include <boost/version.hpp>
#if BOOST_VERSION < 106100
#error "This boost::optional version is not supported, use 1.61 or better"
#endif
#endif
#if CLI11_STD_OPTIONAL
#include <optional>
#endif
#if CLI11_EXPERIMENTAL_OPTIONAL
#include <experimental/optional>
#endif
#if CLI11_BOOST_OPTIONAL
#include <boost/optional.hpp>
#include <boost/optional/optional_io.hpp>
#endif
// [CLI11:verbatim]
#if CLI11_STD_OPTIONAL
TEST_F(TApp, StdOptionalTest) {
std::optional<int> opt;
app.add_option("-c,--count", opt);
run();
EXPECT_FALSE(opt);
args = {"-c", "1"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 1);
args = {"--count", "3"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 3);
}
#endif
#if CLI11_EXPERIMENTAL_OPTIONAL
TEST_F(TApp, ExperimentalOptionalTest) {
std::experimental::optional<int> opt;
app.add_option("-c,--count", opt);
run();
EXPECT_FALSE(opt);
args = {"-c", "1"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 1);
args = {"--count", "3"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 3);
}
#endif
#if CLI11_BOOST_OPTIONAL
TEST_F(TApp, BoostOptionalTest) {
boost::optional<int> opt;
app.add_option("-c,--count", opt);
run();
EXPECT_FALSE(opt);
args = {"-c", "1"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 1);
opt = {};
args = {"--count", "3"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 3);
}
TEST_F(TApp, BoostOptionalint64Test) {
boost::optional<int64_t> opt;
app.add_option("-c,--count", opt);
run();
EXPECT_FALSE(opt);
args = {"-c", "1"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 1);
opt = {};
args = {"--count", "3"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, 3);
}
TEST_F(TApp, BoostOptionalStringTest) {
boost::optional<std::string> opt;
app.add_option("-s,--string", opt);
run();
EXPECT_FALSE(opt);
args = {"-s", "strval"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, "strval");
opt = {};
args = {"--string", "strv"};
run();
EXPECT_TRUE(opt);
EXPECT_EQ(*opt, "strv");
}
TEST_F(TApp, BoostOptionalEnumTest) {
enum class eval : char { val0 = 0, val1 = 1, val2 = 2, val3 = 3, val4 = 4 };
boost::optional<eval> opt;
auto optptr = app.add_option<decltype(opt), eval>("-v,--val", opt);
optptr->capture_default_str();
auto dstring = optptr->get_default_str();
EXPECT_TRUE(dstring.empty());
run();
EXPECT_FALSE(opt);
args = {"-v", "3"};
run();
EXPECT_TRUE(opt);
EXPECT_TRUE(*opt == eval::val3);
opt = {};
args = {"--val", "1"};
run();
EXPECT_TRUE(opt);
EXPECT_TRUE(*opt == eval::val1);
}
TEST_F(TApp, BoostOptionalVector) {
boost::optional<std::vector<int>> opt;
app.add_option_function<std::vector<int>>("-v,--vec", [&opt](const std::vector<int> &v) { opt = v; }, "some vector")
->expected(3);
run();
EXPECT_FALSE(opt);
args = {"-v", "1", "4", "5"};
run();
EXPECT_TRUE(opt);
std::vector<int> expV{1, 4, 5};
EXPECT_EQ(*opt, expV);
}
#endif
#if !CLI11_OPTIONAL
TEST_F(TApp, DISABLED_OptionalTest) {}
#endif