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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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33
test/unittest/stringbuffertest.cpp
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@@ -70,6 +70,32 @@ TEST(StringBuffer, Pop) {
}
#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
#include <type_traits>
TEST(StringBuffer, Traits) {
static_assert( std::is_constructible<StringBuffer>::value, "");
static_assert( std::is_default_constructible<StringBuffer>::value, "");
static_assert(!std::is_copy_constructible<StringBuffer>::value, "");
static_assert( std::is_move_constructible<StringBuffer>::value, "");
static_assert(!std::is_nothrow_constructible<StringBuffer>::value, "");
static_assert(!std::is_nothrow_default_constructible<StringBuffer>::value, "");
static_assert(!std::is_nothrow_copy_constructible<StringBuffer>::value, "");
static_assert(!std::is_nothrow_move_constructible<StringBuffer>::value, "");
static_assert( std::is_assignable<StringBuffer,StringBuffer>::value, "");
static_assert(!std::is_copy_assignable<StringBuffer>::value, "");
static_assert( std::is_move_assignable<StringBuffer>::value, "");
static_assert(!std::is_nothrow_assignable<StringBuffer,StringBuffer>::value, "");
static_assert(!std::is_nothrow_copy_assignable<StringBuffer>::value, "");
static_assert(!std::is_nothrow_move_assignable<StringBuffer>::value, "");
static_assert( std::is_destructible<StringBuffer>::value, "");
static_assert( std::is_nothrow_destructible<StringBuffer>::value, "");
}
TEST(StringBuffer, MoveConstructor) {
StringBuffer x;
x.Put('A');
@@ -80,13 +106,13 @@ TEST(StringBuffer, MoveConstructor) {
EXPECT_EQ(4u, x.GetSize());
EXPECT_STREQ("ABCD", x.GetString());
// StringBuffer y(x); // should not compile
// StringBuffer y(x); // does not compile (!is_copy_constructible)
StringBuffer y(std::move(x));
EXPECT_EQ(0u, x.GetSize());
EXPECT_EQ(4u, y.GetSize());
EXPECT_STREQ("ABCD", y.GetString());
// StringBuffer z = y; // should not compile
// StringBuffer z = y; // does not compile (!is_copy_assignable)
StringBuffer z = std::move(y);
EXPECT_EQ(0u, y.GetSize());
EXPECT_EQ(4u, z.GetSize());
@@ -104,10 +130,11 @@ TEST(StringBuffer, MoveAssignment) {
EXPECT_STREQ("ABCD", x.GetString());
StringBuffer y;
// y = x; // should not compile
// y = x; // does not compile (!is_copy_assignable)
y = std::move(x);
EXPECT_EQ(0u, x.GetSize());
EXPECT_EQ(4u, y.GetSize());
EXPECT_STREQ("ABCD", y.GetString());
}
#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS