GCC Code Coverage Report

Directory:	./
File:	TestSharedRef.cpp
Date:	2026-03-21 20:51:59

	Exec	Total	Coverage
Lines:	101	101	100.0%
Functions:	24	24	100.0%
Branches:	218	724	30.1%

  
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      #include "SharedRef.hpp"
    
      #include "Shape.hpp"
    
      #include "Verbose.hpp"
    
      #include "compat/gsl14.hpp"
    
      #include <gmock/gmock.h>
    
      #include <vector>
    
      using namespace testing;
    
      using namespace testing::internal;
    
      // Anonymous namespace for definitions that are local to this file.
    
      namespace {
    
          template <typename T>
    
          using SharedContainer = std::vector<SharedRef<T>>;
    
          // Both refer to the same object (same address)
    
          template <typename T>
    
      3
          bool same(const SharedRef<T>& a, const SharedRef<T>& b) {
    
      3
              return &a.get() == &b.get();
    
          }
    
      6
          bool less(const Verbose<>& left, const Verbose<>& right) {
    
      6
              return left.name() < right.name();
    
          }
    
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          const std::string& name(const Verbose<Circle>& v) { return v.name(); }
    
      39
          const std::string& name(const Verbose<>& v) { return v.name(); }
    
      9
          double area(const Shape& a) { return a.area(); }
    
          // Print the elements of a container of smart references.
    
          template <typename T>
    
      4
          void print(
    
                  const SharedContainer<Verbose<T>>& container,
    
                  const std::string& prefix = "print: ") {
    
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              for (const auto& elem : container) {
    
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                  std::cout << prefix << name(elem) << std::endl;
    
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                  EXPECT_THAT(name(elem), Not(HasSubstr("copy")));
    
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                  EXPECT_THAT(name(elem), Not(HasSubstr("move")));
    
              }
    
      4
          }
    
      } // anonymous namespace
    
      // NOLINTBEGIN(*-avoid-magic-numbers)
    
      8
      TEST(SharedRef, constructor) {
    
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          auto a = makeSharedRef<Verbose<Circle>>("one", 1.0);
    
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          auto b = makeSharedRef<Verbose<Circle>>("two", 2.0);
    
          // auto c = SharedRef<Verbose<Circle>> { }; // no dangling references!
    
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          EXPECT_FALSE(same(a, b));
    
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          EXPECT_NE(name(a), name(b));
    
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          EXPECT_NE(area(a), area(b));
    
      4
      }
    
      8
      TEST(SharedRef, copy) {
    
          // SharedRef is copyable because shared_ptr is copyable.
    
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          EXPECT_TRUE(std::is_copy_constructible<SharedRef<Shape>>::value);
    
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          EXPECT_TRUE(std::is_copy_assignable<SharedRef<Shape>>::value);
    
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          auto a = makeSharedRef<Verbose<Circle>>("one", 1.0);
    
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          auto b = makeSharedRef<Verbose<Circle>>("two", 2.0);
    
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          auto c = makeSharedRef<Verbose<Circle>>("three", 3.0);
    
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          auto d = SharedRef<Verbose<Circle>>{a}; // copy constructor
    
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          c = b; // copy assignment
    
          // Copying modifies the reference, not the object.
    
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          EXPECT_TRUE(same(a, d)); // both refer to same object
    
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          EXPECT_EQ(name(a), name(d));
    
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          EXPECT_EQ(area(a), area(d));
    
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          EXPECT_TRUE(same(b, c)); // both refer to same object
    
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          EXPECT_EQ(name(b), name(c));
    
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          EXPECT_EQ(area(b), area(c));
    
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          EXPECT_THAT(name(c), EndsWith("two"));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("three")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("copy")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("move")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("construct")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("assign")));
    
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          EXPECT_THAT(name(d), EndsWith("one"));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("copy")));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("move")));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("construct")));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("assign")));
    
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      }
    
      8
      TEST(SharedRef, move) {
    
          // SharedRef is moveable because shared_ptr is moveable.
    
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          EXPECT_TRUE(std::is_move_constructible<SharedRef<Shape>>::value);
    
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          EXPECT_TRUE(std::is_move_assignable<SharedRef<Shape>>::value);
    
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          auto a = makeSharedRef<Verbose<Circle>>("one", 1.0);
    
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          auto b = makeSharedRef<Verbose<Circle>>("two", 2.0);
    
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          auto c = makeSharedRef<Verbose<Circle>>("three", 3.0);
    
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          auto d = SharedRef<Verbose<Circle>>{std::move(a)}; // move constructor
    
      2
          c = std::move(b); // move assignment
    
          // Moving modifies the reference, not the object.
    
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          EXPECT_THAT(name(c), EndsWith("two"));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("three")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("copy")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("move")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("construct")));
    
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          EXPECT_THAT(name(c), Not(HasSubstr("assign")));
    
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          EXPECT_THAT(name(d), EndsWith("one"));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("copy")));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("move")));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("construct")));
    
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          EXPECT_THAT(name(d), Not(HasSubstr("assign")));
    
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      }
    
      8
      TEST(SharedRef, rebind) {
    
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          CaptureStdout();
    
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          auto a = SharedRef<Shape>{new Verbose<Square>{"square", 3.0}};
    
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          auto b = a; // copy reference, not object
    
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          b = SharedRef<Shape>{new Verbose<Circle>{"circle", 3.0}};
    
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          auto actual = GetCapturedStdout();
    
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          EXPECT_NE(area(a), area(b));
    
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          EXPECT_THAT(actual, Not(HasSubstr("copy")));
    
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          EXPECT_THAT(actual, Not(HasSubstr("move")));
    
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          std::cout << std::endl << actual << std::endl;
    
      4
      }
    
      8
      TEST(SharedRef, swap) {
    
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          auto a = SharedRef<Shape>{new Verbose<Square>{"square", 1.0}};
    
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          auto b = SharedRef<Shape>{new Verbose<Circle>{"circle", 2.0}};
    
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      2
          CaptureStdout();
    
      2
          swap(a, b); // swap references, not objects
    
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          auto actual = GetCapturedStdout();
    
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          EXPECT_EQ(1.0, area(b));
    
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          EXPECT_TRUE(actual.empty()) << actual;
    
      4
      }
    
      8
      TEST(SharedRef, container) {
    
      2
          auto container = SharedContainer<Verbose<>>{};
    
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          container.emplace_back(std::make_shared<Verbose<>>("one"));
    
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          container.emplace_back(std::make_shared<Verbose<>>("two"));
    
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          container.emplace_back(std::make_shared<Verbose<>>("three"));
    
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          print(container, "original :");
    
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          EXPECT_EQ("two", name(container[1]));
    
          // Copying a container of references
    
          // does not copy the referenced objects.
    
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          auto container_copy = container;
    
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          print(container_copy, "copy: ");
    
          // Sorting a container of references
    
          // does not affect the original container.
    
      #if __cplusplus >= 202002L // since C++20
    
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          std::ranges::sort(container_copy, less);
    
      #else // until C++20
    
          std::sort(container_copy.begin(), container_copy.end(), less);
    
      #endif // C++20
    
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          print(container_copy, "sorted: ");
    
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          EXPECT_EQ(name(container[2]), name(container_copy[1]));
    
          // Moving a container of references
    
          // does not move the objects.
    
      4
          auto container_move = std::move(container);
    
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          print(container_move, "move: ");
    
      4
      }
    
      // NOLINTEND(*-avoid-magic-numbers)

Line	Branch	Exec	Source
1			#include "SharedRef.hpp"
2
3			#include "Shape.hpp"
4			#include "Verbose.hpp"
5			#include "compat/gsl14.hpp"
6
7			#include <gmock/gmock.h>
8			#include <vector>
9
10			using namespace testing;
11			using namespace testing::internal;
12
13			// Anonymous namespace for definitions that are local to this file.
14			namespace {
15			template <typename T>
16			using SharedContainer = std::vector<SharedRef<T>>;
17
18			// Both refer to the same object (same address)
19			template <typename T>
20		3	bool same(const SharedRef<T>& a, const SharedRef<T>& b) {
21		3	return &a.get() == &b.get();
22			}
23
24		6	bool less(const Verbose<>& left, const Verbose<>& right) {
25		6	return left.name() < right.name();
26			}
27
28		28	const std::string& name(const Verbose<Circle>& v) { return v.name(); }
29
30		39	const std::string& name(const Verbose<>& v) { return v.name(); }
31
32		9	double area(const Shape& a) { return a.area(); }
33
34			// Print the elements of a container of smart references.
35			template <typename T>
36		4	void print(
37			const SharedContainer<Verbose<T>>& container,
38			const std::string& prefix = "print: ") {
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40	3/6 ✓ Branch 3 taken 12 times. ✗ Branch 4 not taken. ✓ Branch 12 taken 12 times. ✗ Branch 13 not taken. ✓ Branch 18 taken 12 times. ✗ Branch 19 not taken.	12	std::cout << prefix << name(elem) << std::endl;
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43			}
44		4	}
45			} // anonymous namespace
46
47			// NOLINTBEGIN(*-avoid-magic-numbers)
48
49		8	TEST(SharedRef, constructor) {
50	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto a = makeSharedRef<Verbose<Circle>>("one", 1.0);
51	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto b = makeSharedRef<Verbose<Circle>>("two", 2.0);
52			// auto c = SharedRef<Verbose<Circle>> { }; // no dangling references!
53
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57		4	}
58
59		8	TEST(SharedRef, copy) {
60			// SharedRef is copyable because shared_ptr is copyable.
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63
64	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto a = makeSharedRef<Verbose<Circle>>("one", 1.0);
65	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto b = makeSharedRef<Verbose<Circle>>("two", 2.0);
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67		2	auto d = SharedRef<Verbose<Circle>>{a}; // copy constructor
68
69		2	c = b; // copy assignment
70
71			// Copying modifies the reference, not the object.
72
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76
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80
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87
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93		4	}
94
95		8	TEST(SharedRef, move) {
96			// SharedRef is moveable because shared_ptr is moveable.
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99
100	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto a = makeSharedRef<Verbose<Circle>>("one", 1.0);
101	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto b = makeSharedRef<Verbose<Circle>>("two", 2.0);
102	1/2 ✓ Branch 4 taken 1 times. ✗ Branch 5 not taken.	2	auto c = makeSharedRef<Verbose<Circle>>("three", 3.0);
103		4	auto d = SharedRef<Verbose<Circle>>{std::move(a)}; // move constructor
104
105		2	c = std::move(b); // move assignment
106
107			// Moving modifies the reference, not the object.
108
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115
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121		4	}
122
123		8	TEST(SharedRef, rebind) {
124	1/2 ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken.	2	CaptureStdout();
125	4/10 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken. ✓ Branch 8 taken 1 times. ✗ Branch 9 not taken. ✓ Branch 13 taken 1 times. ✗ Branch 14 not taken. ✗ Branch 20 not taken. ✓ Branch 21 taken 1 times. ✗ Branch 27 not taken. ✗ Branch 28 not taken.	6	auto a = SharedRef<Shape>{new Verbose<Square>{"square", 3.0}};
126		2	auto b = a; // copy reference, not object
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128	1/2 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken.	2	auto actual = GetCapturedStdout();
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132	3/6 ✓ Branch 3 taken 1 times. ✗ Branch 4 not taken. ✓ Branch 7 taken 1 times. ✗ Branch 8 not taken. ✓ Branch 13 taken 1 times. ✗ Branch 14 not taken.	2	std::cout << std::endl << actual << std::endl;
133		4	}
134
135		8	TEST(SharedRef, swap) {
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138	1/2 ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken.	2	CaptureStdout();
139		2	swap(a, b); // swap references, not objects
140	1/2 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken.	2	auto actual = GetCapturedStdout();
141	3/12 ✓ Branch 6 taken 1 times. ✗ Branch 7 not taken. ✓ Branch 12 taken 1 times. ✗ Branch 13 not taken. ✗ Branch 17 not taken. ✓ Branch 18 taken 1 times. ✗ Branch 21 not taken. ✗ Branch 22 not taken. ✗ Branch 27 not taken. ✗ Branch 28 not taken. ✗ Branch 31 not taken. ✗ Branch 32 not taken.	2	EXPECT_EQ(1.0, area(b));
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143		4	}
144
145		8	TEST(SharedRef, container) {
146		2	auto container = SharedContainer<Verbose<>>{};
147	2/4 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken. ✓ Branch 6 taken 1 times. ✗ Branch 7 not taken.	2	container.emplace_back(std::make_shared<Verbose<>>("one"));
148	2/4 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken. ✓ Branch 6 taken 1 times. ✗ Branch 7 not taken.	2	container.emplace_back(std::make_shared<Verbose<>>("two"));
149	2/4 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken. ✓ Branch 6 taken 1 times. ✗ Branch 7 not taken.	2	container.emplace_back(std::make_shared<Verbose<>>("three"));
150
151	2/4 ✓ Branch 3 taken 1 times. ✗ Branch 4 not taken. ✓ Branch 7 taken 1 times. ✗ Branch 8 not taken.	6	print(container, "original :");
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153
154			// Copying a container of references
155			// does not copy the referenced objects.
156	1/2 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken.	2	auto container_copy = container;
157	2/4 ✓ Branch 3 taken 1 times. ✗ Branch 4 not taken. ✓ Branch 7 taken 1 times. ✗ Branch 8 not taken.	6	print(container_copy, "copy: ");
158
159			// Sorting a container of references
160			// does not affect the original container.
161			#if __cplusplus >= 202002L // since C++20
162	1/2 ✓ Branch 2 taken 1 times. ✗ Branch 3 not taken.	2	std::ranges::sort(container_copy, less);
163			#else // until C++20
164			std::sort(container_copy.begin(), container_copy.end(), less);
165			#endif // C++20
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168
169			// Moving a container of references
170			// does not move the objects.
171		4	auto container_move = std::move(container);
172	2/4 ✓ Branch 3 taken 1 times. ✗ Branch 4 not taken. ✓ Branch 7 taken 1 times. ✗ Branch 8 not taken.	6	print(container_move, "move: ");
173		4	}
174
175			// NOLINTEND(*-avoid-magic-numbers)
176