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Document traits of types using <type_traits> and static_assert in tests.

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The tests state the current traits of types Document, Value and
StringBuffer. There are slight differences between them. It seems like a
good idea to extend this approach across more types, and to review the
expected traits across the board.
This commit is contained in:
Drew Noakes
2014-10-31 10:59:35 +00:00
parent d6c1c57159
commit 6aa664eeef
3 changed files with 89 additions and 9 deletions
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32
test/unittest/valuetest.cpp
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@@ -39,6 +39,33 @@ TEST(Value, DefaultConstructor) {
//}
#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
#include <type_traits>
TEST(Value, Traits) {
typedef GenericValue<UTF8<>, CrtAllocator> Value;
static_assert( std::is_constructible<Value>::value, "");
static_assert( std::is_default_constructible<Value>::value, "");
static_assert(!std::is_copy_constructible<Value>::value, "");
static_assert( std::is_move_constructible<Value>::value, "");
static_assert( std::is_nothrow_constructible<Value>::value, "");
static_assert( std::is_nothrow_default_constructible<Value>::value, "");
static_assert(!std::is_nothrow_copy_constructible<Value>::value, "");
static_assert( std::is_nothrow_move_constructible<Value>::value, "");
static_assert( std::is_assignable<Value,Value>::value, "");
static_assert(!std::is_copy_assignable<Value>::value, "");
static_assert( std::is_move_assignable<Value>::value, "");
static_assert( std::is_nothrow_assignable<Value,Value>::value, "");
static_assert(!std::is_nothrow_copy_assignable<Value>::value, "");
static_assert( std::is_nothrow_move_assignable<Value>::value, "");
static_assert( std::is_destructible<Value>::value, "");
static_assert( std::is_nothrow_destructible<Value>::value, "");
}
TEST(Value, MoveConstructor) {
typedef GenericValue<UTF8<>, CrtAllocator> Value;
Value::AllocatorType allocator;
@@ -49,18 +76,19 @@ TEST(Value, MoveConstructor) {
EXPECT_TRUE(x.IsArray());
EXPECT_EQ(4u, x.Size());
// Value y(x); // should not compile
// Value y(x); // does not compile (!is_copy_constructible)
Value y(std::move(x));
EXPECT_TRUE(x.IsNull());
EXPECT_TRUE(y.IsArray());
EXPECT_EQ(4u, y.Size());
// Value z = y; // should not compile
// Value z = y; // does not compile (!is_copy_assignable)
Value z = std::move(y);
EXPECT_TRUE(y.IsNull());
EXPECT_TRUE(z.IsArray());
EXPECT_EQ(4u, z.Size());
}
#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
TEST(Value, AssignmentOperator) {