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/***************************************************************************
* Copyright (c) Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
* Copyright (c) QuantStack *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/
#include "xtl/xoptional.hpp"
#include "xtl/xoptional_sequence.hpp"
#include <algorithm>
#include <sstream>
#include <string>
#include <vector>
#include "xtl/xany.hpp"
#include "gtest/gtest.h"
#ifdef HAVE_NLOHMANN_JSON
#include "xtl/xjson.hpp"
#endif
namespace xtl
{
TEST(xoptional, scalar_tests)
{
// Test uninitialized == missing
xoptional<double, bool> v0;
ASSERT_FALSE(v0.has_value());
// Test initialization from value
xoptional<double, bool> v1(1.0);
ASSERT_TRUE(v1.has_value());
ASSERT_EQ(v1.value(), 1.0);
// Test lvalue closure types
double value1 = 3.0;
int there = 0;
auto opt1 = optional(value1, there);
ASSERT_FALSE(opt1.has_value());
opt1 = 1.0;
ASSERT_TRUE(opt1.has_value());
ASSERT_EQ(value1, 1.0);
// Test rvalue closure type for boolean
double value2 = 3.0;
auto opt2 = optional(value2, true);
opt2 = 2.0;
ASSERT_TRUE(opt2.has_value());
ASSERT_EQ(value2, 2.0);
auto ptr_opt2 = &opt2;
EXPECT_TRUE(ptr_opt2->has_value());
EXPECT_EQ(ptr_opt2->value(), 2.0);
}
TEST(xoptional, string)
{
xoptional<std::string, bool> opt1;
opt1 = "foo";
ASSERT_TRUE(opt1.has_value());
xoptional<std::string, bool> opt2 = "bar";
ASSERT_TRUE(opt2.has_value());
}
TEST(xoptional, vector)
{
xoptional_vector<double> v(3, 2.0);
ASSERT_TRUE(v.front().has_value());
ASSERT_TRUE(v[0].has_value());
ASSERT_EQ(v[0].value(), 2.0);
v[1] = missing<double>();
ASSERT_FALSE(v[1].has_value());
ASSERT_TRUE(v.has_value().front());
ASSERT_FALSE(v.has_value()[1]);
}
TEST(xoptional, vector_iteration)
{
xoptional_vector<double> v(4, 2.0);
v[0] = missing<double>();
std::vector<double> res;
for (auto it = v.cbegin(); it != v.cend(); ++it)
{
res.push_back(it->value_or(0.0));
}
std::vector<double> expect = {0.0, 2.0, 2.0, 2.0};
ASSERT_TRUE(std::equal(res.begin(), res.end(), expect.begin()));
}
TEST(xoptional, comparison)
{
ASSERT_TRUE(optional(1.0, true) == 1.0);
ASSERT_TRUE(optional(1.0, false) == missing<double>());
ASSERT_FALSE(missing<double>() == 1.0);
ASSERT_TRUE(missing<double>() != 1.0);
}
TEST(xoptional, vector_comparison)
{
xoptional_vector<double> v1(4, 2.0);
v1[0] = missing<double>();
xoptional_vector<double> v2(4, 1.0);
v2[0] = missing<double>();
EXPECT_TRUE(v1 == v1);
EXPECT_FALSE(v1 == v2);
EXPECT_TRUE(v1 != v2);
EXPECT_FALSE(v1 != v1);
EXPECT_TRUE(v2 < v1);
EXPECT_FALSE(v1 < v1);
EXPECT_TRUE(v1 <= v1);
EXPECT_FALSE(v1 <= v2);
EXPECT_TRUE(v1 > v2);
EXPECT_FALSE(v2 > v1);
EXPECT_TRUE(v1 >= v1);
EXPECT_FALSE(v2 >= v1);
}
TEST(xoptional, io)
{
std::ostringstream oss;
oss << missing<int>();
ASSERT_EQ(oss.str(), std::string("N/A"));
}
struct implicit_double
{
implicit_double(double v) : m_value(v) {}
double m_value;
};
struct explicit_double
{
explicit explicit_double(double v) : m_value(v) {}
double m_value;
};
struct implicit_bool
{
implicit_bool(bool b) : m_value(b) {}
bool m_value;
};
struct explicit_bool
{
explicit explicit_bool(bool b) : m_value(b) {}
bool m_value;
};
TEST(xoptional, implicit_constructor)
{
bool res1 = std::is_convertible<double, implicit_double>::value;
bool res2 = std::is_convertible<double, explicit_double>::value;
EXPECT_TRUE(res1);
EXPECT_FALSE(res2);
bool res3 = std::is_convertible<double, xoptional<implicit_double>>::value;
bool res4 = std::is_convertible<double, xoptional<explicit_double>>::value;
EXPECT_TRUE(res3);
EXPECT_FALSE(res4);
bool res5 = std::is_convertible<xoptional<double>, xoptional<implicit_double >>::value;
bool res6 = std::is_convertible<xoptional<double>, xoptional<explicit_double >>::value;
EXPECT_TRUE(res5);
EXPECT_FALSE(res6);
bool res7 = std::is_convertible<xoptional<double, bool>, xoptional<double, implicit_bool>>::value;
bool res8 = std::is_convertible<xoptional<double, bool>, xoptional<double, explicit_bool>>::value;
EXPECT_TRUE(res7);
EXPECT_FALSE(res8);
}
TEST(xoptional, xoptional_proxy)
{
using optional = xoptional<double, bool>;
using optional_ref = xoptional<double&, bool&>;
double d1 = 1.2;
bool b1 = true;
double d2 = 2.3;
bool b2 = true;
optional_ref o1(d1, b1);
optional_ref o2(d2, b2);
auto res1 = o1 + o2;
EXPECT_EQ(res1, optional(d1 + d2, true));
auto res2 = o1 - o2;
EXPECT_EQ(res2, optional(d1 - d2, true));
auto res3 = o1 * o2;
EXPECT_EQ(res3, optional(d1 * d2, true));
auto res4 = o1 / o2;
EXPECT_EQ(res4, optional(d1 / d2, true));
xoptional<bool> res7 = o1 < o2;
EXPECT_TRUE(res7.value());
double d3 = 4.5;
bool b3 = true;
optional_ref o3(d3, b3);
auto res8 = fma(o1, o2, o3);
EXPECT_EQ(res8, std::fma(d1, d2, d3));
using optional_int = xoptional<int, bool>;
using optional_int_ref = xoptional<int&, bool&>;
int i1 = 9;
int i2 = 4;
optional_int_ref oi1(i1, b1);
optional_int_ref oi2(i2, b2);
auto res9 = oi1 % oi2;
EXPECT_EQ(res9, optional(i1 % i2, true));
auto res10 = oi1 & oi2;
EXPECT_EQ(res10, optional(i1 & i2, true));
auto res11 = oi1 | oi2;
EXPECT_EQ(res11, optional(i1 | i2, true));
auto res12 = oi1 ^ oi2;
EXPECT_EQ(res12, optional(i1 ^ i2, true));
auto res13 = ~oi1;
EXPECT_EQ(res13, optional(~i1, true));
auto res5 = oi1 || oi2;
EXPECT_EQ(res5, optional(i1 || i2, true));
auto res6 = oi1 && oi2;
EXPECT_EQ(res6, optional(i1 && i2, true));
}
TEST(xoptional, free_functions)
{
// Test uninitialized == missing
xoptional<double, bool> v0;
ASSERT_FALSE(has_value(v0));
// Test initialization from value
xoptional<double, bool> v1(1.0);
ASSERT_TRUE(has_value(v1));
ASSERT_EQ(value(v1), 1.0);
// Test lvalue closure types
double value1 = 3.0;
int there = 0;
auto opt1 = optional(value1, there);
ASSERT_FALSE(has_value(opt1));
opt1 = 1.0;
ASSERT_TRUE(has_value(opt1));
ASSERT_EQ(value1, 1.0);
// Test rvalue closure type for boolean
double value2 = 3.0;
auto opt2 = optional(value2, true);
value(opt2) = 2.0;
ASSERT_TRUE(has_value(opt2));
ASSERT_EQ(value2, 2.0);
}
TEST(xoptional, any)
{
using opt_type = xoptional<const double&, const bool&>;
double d = 1.;
bool f = true;
opt_type o(d, f);
xtl::any a(o);
opt_type res = any_cast<opt_type>(a);
EXPECT_EQ(res.value(), o.value());
EXPECT_EQ(res.has_value(), o.has_value());
}
#ifdef HAVE_NLOHMANN_JSON
TEST(xoptional, json)
{
xoptional<double> m1 = missing<double>();
nlohmann::json j1 = m1;
EXPECT_TRUE(j1.is_null());
EXPECT_EQ(j1.get<xoptional<double>>(), missing<double>());
xoptional<double> m2 = 3.0;
nlohmann::json j2 = m2;
EXPECT_EQ(j2.get<xoptional<double>>(), 3.0);
}
#endif
TEST(xoptional, select)
{
using opt_type = xoptional<double, bool>;
using bool_opt_type = xoptional<bool, bool>;
auto missing_val = missing<double>();
EXPECT_EQ(select(true, missing_val, 3.), missing_val);
EXPECT_EQ(select(false, missing_val, 3.).value(), 3.);
EXPECT_TRUE(select(false, missing_val, 3.).has_value());
EXPECT_EQ(select(bool_opt_type(true), 2., 3.).value(), 2.);
EXPECT_EQ(select(bool_opt_type(false), 2., 3.).value(), 3.);
}
}
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