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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
//
// Copyright (C) 2018 Intel Corporation
#include "../test_precomp.hpp"
#include "opencv2/gapi/util/optional.hpp"
#include <opencv2/gapi/util/compiler_hints.hpp> //suppress_unused_warning
namespace opencv_test
{
TEST(Optional, EmptyCtor)
{
util::optional<int> o;
EXPECT_FALSE(o.has_value());
EXPECT_FALSE(static_cast<bool>(o));
}
TEST(Optional, ValueCTor)
{
util::optional<int> o(42);
EXPECT_TRUE(o.has_value());
EXPECT_TRUE(static_cast<bool>(o));
}
TEST(Optional, MoveCtr)
{
util::optional<std::string> os1(std::string("text"));
EXPECT_TRUE(os1.has_value());
util::optional<std::string> os2(std::move(os1));
EXPECT_FALSE(os1.has_value());
EXPECT_TRUE(os2.has_value());
EXPECT_EQ("text", os2.value());
}
TEST(Optional, EmptyThrows)
{
struct foo { int bar; };
util::optional<foo> om;
const util::optional<foo> oc;
int dummy;
EXPECT_THROW(dummy = om->bar, util::bad_optional_access);
EXPECT_THROW(dummy = oc->bar, util::bad_optional_access);
cv::util::suppress_unused_warning(dummy);
EXPECT_THROW(*om, util::bad_optional_access);
EXPECT_THROW(*oc, util::bad_optional_access);
EXPECT_THROW(om.value(), util::bad_optional_access);
EXPECT_THROW(oc.value(), util::bad_optional_access);
}
TEST(Optional, ValueNoThrow)
{
struct foo { int bar; };
util::optional<foo> om(foo{42});
const util::optional<foo> oc(foo{42});
int dummy;
EXPECT_NO_THROW(dummy = om->bar);
EXPECT_NO_THROW(dummy = oc->bar);
cv::util::suppress_unused_warning(dummy);
EXPECT_NO_THROW(*om);
EXPECT_NO_THROW(*oc);
EXPECT_NO_THROW(om.value());
EXPECT_NO_THROW(oc.value());
}
TEST(Optional, Value)
{
util::optional<int> oi(42);
struct foo { int bar; };
util::optional<foo> of(foo{42});
EXPECT_EQ(42, oi.value());
EXPECT_EQ(42, *oi);
EXPECT_EQ(42, of.value().bar);
EXPECT_EQ(42, of->bar);
}
TEST(Optional, Mutable)
{
util::optional<int> oi(42);
*oi = 43;
EXPECT_EQ(43, *oi);
struct foo { int bar; int baz; };
util::optional<foo> of(foo{11,22});
(*of).bar = 42;
EXPECT_EQ(42, of->bar);
EXPECT_EQ(22, of->baz);
of->baz = 33;
EXPECT_EQ(42, of->bar);
EXPECT_EQ(33, of->baz);
}
TEST(Optional, MoveAssign)
{
util::optional<int> e, i(42);
EXPECT_FALSE(e.has_value());
EXPECT_TRUE(i.has_value());
EXPECT_EQ(42, *i);
e = std::move(i);
EXPECT_TRUE(e.has_value());
EXPECT_FALSE(i.has_value());
EXPECT_EQ(42, *e);
}
TEST(Optional, CopyAssign)
{
util::optional<int> e;
const util::optional<int> i(42);
EXPECT_FALSE(e.has_value());
EXPECT_TRUE(i.has_value());
EXPECT_EQ(42, *i);
e = i;
EXPECT_TRUE(e.has_value());
EXPECT_TRUE(i.has_value());
EXPECT_EQ(42, *e);
EXPECT_EQ(42, *i);
}
TEST(Optional, ValueOr)
{
util::optional<int> e;
EXPECT_FALSE(e.has_value());
EXPECT_EQ(42, e.value_or(42));
EXPECT_EQ(42, e.value_or(42.1));
}
TEST(Optional, Swap)
{
util::optional<int> e, i(42);
EXPECT_FALSE(e.has_value());
EXPECT_TRUE(i.has_value());
EXPECT_EQ(42, *i);
e.swap(i);
EXPECT_TRUE(e.has_value());
EXPECT_FALSE(i.has_value());
EXPECT_EQ(42, *e);
}
TEST(Optional, Reset)
{
util::optional<int> i(42);
EXPECT_TRUE(i.has_value());
i.reset();
EXPECT_FALSE(i.has_value());
}
TEST(Optional, MakeOptional)
{
std::string s("text");
auto os = util::make_optional(s);
EXPECT_TRUE(os.has_value());
EXPECT_EQ(s, os.value());
}
} // namespace opencv_test