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Add tests for MetaTrait concept

This commit is contained in:
Sameer Rahmani 2021-05-03 22:45:35 +01:00
parent 4040b1ff45
commit d0defdbf54
2 changed files with 37 additions and 23 deletions
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20
include/serene/traits.h
View File

@ -109,26 +109,6 @@ protected:
};
};
template <typename ConcreteType>
class Printable : public TraitBase<ConcreteType, Printable> {
public:
Printable(){};
Printable(const Printable &) = delete;
std::string Print() const { return this->Object().Print(); }
};
template <typename ConcreteType>
class Analyzable : public TraitBase<ConcreteType, Analyzable> {
public:
Analyzable(){};
Analyzable(const Analyzable &) = delete;
std::string Analyze() const { return this->Object().Analyze(); }
};
template <typename T> std::string Print(Printable<T> &t) { return t.Print(); }
template <typename T> std::string Analyze(Analyzable<T> &t) {
return t.Analyze();
};
}; // namespace serene
#endif

40
src/tests/traits_tests.cpp.inc
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@ -28,6 +28,28 @@
namespace serene {
template <typename ConcreteType>
class Printable : public TraitBase<ConcreteType, Printable> {
public:
Printable(){};
Printable(const Printable &) = delete;
std::string Print() const { return this->Object().Print(); }
};
template <typename ConcreteType>
class Analyzable : public TraitBase<ConcreteType, Analyzable> {
public:
Analyzable(){};
Analyzable(const Analyzable &) = delete;
std::string Analyze() const { return this->Object().Analyze(); }
};
template <typename T> std::string Print(Printable<T> &t) { return t.Print(); }
template <typename T> std::string Analyze(Analyzable<T> &t) {
return t.Analyze();
};
class A : public WithTrait<A, Printable, Analyzable> {
std::string x;
@ -40,7 +62,9 @@ public:
};
template <typename T = FinalImpl>
class B : public std::conditional<std::is_same_v<T, FinalImpl>, WithTrait<B<>, Printable, Analyzable>, WithTrait<T, Printable, Analyzable>>::type {
class B : public std::conditional<std::is_same_v<T, FinalImpl>,
WithTrait<B<>, Printable, Analyzable>,
WithTrait<T, Printable, Analyzable>>::type {
std::string y;
@ -63,7 +87,6 @@ public:
std::string Analyze() const { return w; }
};
class D : public WithTrait<D, Printable> {
public:
std::string Print() const { return "D: print"; }
@ -71,26 +94,37 @@ public:
std::string Analyze() const { return "D: analyze with no trait"; }
};
template <typename T>
class MetaTrait : public WithTrait<T, Printable, Analyzable> {};
class E : public MetaTrait<E> {
public:
std::string Print() const { return "E: print"; };
std::string Analyze() const { return "E: in E"; };
};
TEST_CASE("Trait functionality tests", "[Traits]") {
auto a = A("in A");
auto b = B("in B");
auto c = C("gray", "white", "black");
auto d = D();
auto e = E();
CHECK(Print(a) == "A: print");
CHECK(Print(b) == "B: print");
CHECK(Print(c) == "white");
CHECK(Print(d) == "D: print");
CHECK(Print(e) == "E: print");
CHECK(Analyze(a) == "A: in A");
CHECK(Analyze(b) == "B: in B");
CHECK(Analyze(c) == "black");
CHECK(Analyze(e) == "E: in E");
// Even though D has a Analyze method, It's not Analyzable to the
// Analyze function signature won't match
CHECK(d.Analyze() == "D: analyze with no trait");
};
} // namespace serene