namespace {
+enum TestEnumeration {
+ TE_Foo = 42,
+ TE_Bar = 43
+};
TEST(HashingTest, HashValueBasicTest) {
int x = 42, y = 43, c = 'x';
const volatile int cvi = 71;
uintptr_t addr = reinterpret_cast<uintptr_t>(&y);
EXPECT_EQ(hash_value(42), hash_value(x));
+ EXPECT_EQ(hash_value(42), hash_value(TE_Foo));
EXPECT_NE(hash_value(42), hash_value(y));
+ EXPECT_NE(hash_value(42), hash_value(TE_Bar));
EXPECT_NE(hash_value(42), hash_value(p));
EXPECT_EQ(hash_value(71), hash_value(i));
EXPECT_EQ(hash_value(71), hash_value(ci));
EXPECT_EQ(hash_value(c), hash_value('x'));
EXPECT_EQ(hash_value('4'), hash_value('0' + 4));
EXPECT_EQ(hash_value(addr), hash_value(&y));
+}
+TEST(HashingTest, HashValueStdPair) {
EXPECT_EQ(hash_combine(42, 43), hash_value(std::make_pair(42, 43)));
EXPECT_NE(hash_combine(43, 42), hash_value(std::make_pair(42, 43)));
EXPECT_NE(hash_combine(42, 43), hash_value(std::make_pair(42ull, 43ull)));
hash_value(std::make_pair(obj1, std::make_pair(obj2, obj3))));
}
+TEST(HashingTest, HashValueStdString) {
+ std::string s = "Hello World!";
+ EXPECT_EQ(hash_combine_range(s.c_str(), s.c_str() + s.size()), hash_value(s));
+ EXPECT_EQ(hash_combine_range(s.c_str(), s.c_str() + s.size() - 1),
+ hash_value(s.substr(0, s.size() - 1)));
+ EXPECT_EQ(hash_combine_range(s.c_str() + 1, s.c_str() + s.size() - 1),
+ hash_value(s.substr(1, s.size() - 2)));
+
+ std::wstring ws = L"Hello Wide World!";
+ EXPECT_EQ(hash_combine_range(ws.c_str(), ws.c_str() + ws.size()),
+ hash_value(ws));
+ EXPECT_EQ(hash_combine_range(ws.c_str(), ws.c_str() + ws.size() - 1),
+ hash_value(ws.substr(0, ws.size() - 1)));
+ EXPECT_EQ(hash_combine_range(ws.c_str() + 1, ws.c_str() + ws.size() - 1),
+ hash_value(ws.substr(1, ws.size() - 2)));
+}
+
template <typename T, size_t N> T *begin(T (&arr)[N]) { return arr; }
template <typename T, size_t N> T *end(T (&arr)[N]) { return arr + N; }
EXPECT_EQ(hash_combine_range(arr1, arr1 + 6),
hash_combine(i1, i2, i3, i4, i5, i6));
- // Hashing a sequence of heterogenous types which *happen* to all produce the
+ // Hashing a sequence of heterogeneous types which *happen* to all produce the
// same data for hashing produces the same as a range-based hash of the
// fundamental values.
const size_t s1 = 1024, s2 = 8888, s3 = 9000000;