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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/uuid.h"
#include <stdint.h>
#include <limits>
#include <set>
#include <unordered_set>
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
// The format of Uuid version 4 must be xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx,
// where y is one of [8, 9, a, b].
bool IsValidV4(const Uuid& guid) {
const std::string& lowercase = guid.AsLowercaseString();
return guid.is_valid() && lowercase[14] == '4' &&
(lowercase[19] == '8' || lowercase[19] == '9' ||
lowercase[19] == 'a' || lowercase[19] == 'b');
}
} // namespace
TEST(UuidTest, UuidBasicUniqueness) {
constexpr int kIterations = 10;
for (int i = 0; i < kIterations; ++i) {
const Uuid guid1 = Uuid::GenerateRandomV4();
const Uuid guid2 = Uuid::GenerateRandomV4();
EXPECT_NE(guid1, guid2);
EXPECT_TRUE(guid1.is_valid());
EXPECT_TRUE(IsValidV4(guid1));
EXPECT_TRUE(guid2.is_valid());
EXPECT_TRUE(IsValidV4(guid2));
}
}
namespace {
void TestUuidValidity(StringPiece input, bool case_insensitive, bool strict) {
SCOPED_TRACE(input);
{
const Uuid guid = Uuid::ParseCaseInsensitive(input);
EXPECT_EQ(case_insensitive, guid.is_valid());
}
{
const Uuid guid = Uuid::ParseLowercase(input);
EXPECT_EQ(strict, guid.is_valid());
}
}
} // namespace
TEST(UuidTest, Validity) {
// Empty Uuid is invalid.
EXPECT_FALSE(Uuid().is_valid());
enum Parsability { kDoesntParse, kParsesCaseInsensitiveOnly, kAlwaysParses };
static constexpr struct {
StringPiece input;
Parsability parsability;
} kUuidValidity[] = {
{"invalid", kDoesntParse},
{"0123456789ab-cdef-fedc-ba98-76543210", kDoesntParse},
{"0123456789abcdeffedcba9876543210", kDoesntParse},
{"01234567-89Zz-ZzZz-ZzZz-Zz9876543210", kDoesntParse},
{"DEADBEEFDEADBEEFDEADBEEFDEADBEEF", kDoesntParse},
{"deadbeefWdeadXbeefYdeadZbeefdeadbeef", kDoesntParse},
{"XXXdeadbeefWdeadXbeefYdeadZbeefdeadbeefXXX", kDoesntParse},
{"01234567-89aB-cDeF-fEdC-bA9876543210", kParsesCaseInsensitiveOnly},
{"DEADBEEF-DEAD-BEEF-DEAD-BEEFDEADBEEF", kParsesCaseInsensitiveOnly},
{"00000000-0000-0000-0000-000000000000", kAlwaysParses},
{"deadbeef-dead-beef-dead-beefdeadbeef", kAlwaysParses},
};
for (const auto& validity : kUuidValidity) {
const bool case_insensitive = validity.parsability != kDoesntParse;
const bool strict = validity.parsability == kAlwaysParses;
TestUuidValidity(validity.input, case_insensitive, strict);
}
}
TEST(UuidTest, EqualityAndRoundTrip) {
static constexpr char kCanonicalStr[] =
"deadbeef-dead-4eef-bead-beefdeadbeef";
const Uuid from_lower =
Uuid::ParseCaseInsensitive(ToLowerASCII(kCanonicalStr));
EXPECT_EQ(kCanonicalStr, from_lower.AsLowercaseString());
const Uuid from_upper =
Uuid::ParseCaseInsensitive(ToUpperASCII(kCanonicalStr));
EXPECT_EQ(kCanonicalStr, from_upper.AsLowercaseString());
EXPECT_EQ(from_lower, from_upper);
// Invalid Uuids are equal.
EXPECT_EQ(Uuid(), Uuid());
}
TEST(UuidTest, UnorderedSet) {
std::unordered_set<Uuid, UuidHash> guid_set;
static constexpr char kUuid1[] = "01234567-89ab-cdef-fedc-ba9876543210";
guid_set.insert(Uuid::ParseCaseInsensitive(ToLowerASCII(kUuid1)));
EXPECT_EQ(1u, guid_set.size());
guid_set.insert(Uuid::ParseCaseInsensitive(ToUpperASCII(kUuid1)));
EXPECT_EQ(1u, guid_set.size());
static constexpr char kUuid2[] = "deadbeef-dead-beef-dead-beefdeadbeef";
guid_set.insert(Uuid::ParseCaseInsensitive(ToLowerASCII(kUuid2)));
EXPECT_EQ(2u, guid_set.size());
guid_set.insert(Uuid::ParseCaseInsensitive(ToUpperASCII(kUuid2)));
EXPECT_EQ(2u, guid_set.size());
}
TEST(UuidTest, Set) {
std::set<Uuid> guid_set;
static constexpr char kUuid1[] = "01234567-89ab-cdef-0123-456789abcdef";
const Uuid guid1 = Uuid::ParseLowercase(kUuid1);
ASSERT_TRUE(guid1.is_valid());
guid_set.insert(guid1);
static constexpr char kUuid2[] = "deadbeef-dead-beef-dead-beefdeadbeef";
const Uuid guid2 = Uuid::ParseLowercase(kUuid2);
ASSERT_TRUE(guid2.is_valid());
guid_set.insert(guid2);
// Test that the order of the Uuids was preserved.
auto it = guid_set.begin();
EXPECT_EQ(guid1, *it);
++it;
EXPECT_EQ(guid2, *it);
++it;
EXPECT_EQ(guid_set.end(), it);
}
TEST(UuidTest, Compare) {
static constexpr char kUuid[] = "21abd97f-73e8-4b88-9389-a9fee6abda5e";
static constexpr char kUuidLess[] = "1e0dcaca-9e7c-4f4b-bcc6-e4c02b0c99df";
static constexpr char kUuidGreater[] = "6eeb1bc8-186b-433c-9d6a-a827bc96b2d4";
const Uuid guid = Uuid::ParseLowercase(kUuid);
const Uuid guid_eq = Uuid::ParseLowercase(kUuid);
const Uuid guid_lt = Uuid::ParseLowercase(kUuidLess);
const Uuid guid_gt = Uuid::ParseLowercase(kUuidGreater);
const Uuid guid_invalid = Uuid();
EXPECT_TRUE(guid_eq == guid);
EXPECT_FALSE(guid_eq != guid);
EXPECT_FALSE(guid_eq < guid);
EXPECT_TRUE(guid_eq <= guid);
EXPECT_FALSE(guid_eq > guid);
EXPECT_TRUE(guid_eq >= guid);
EXPECT_FALSE(guid_lt == guid);
EXPECT_TRUE(guid_lt != guid);
EXPECT_TRUE(guid_lt < guid);
EXPECT_TRUE(guid_lt <= guid);
EXPECT_FALSE(guid_lt > guid);
EXPECT_FALSE(guid_lt >= guid);
EXPECT_FALSE(guid_gt == guid);
EXPECT_TRUE(guid_gt != guid);
EXPECT_FALSE(guid_gt < guid);
EXPECT_FALSE(guid_gt <= guid);
EXPECT_TRUE(guid_gt > guid);
EXPECT_TRUE(guid_gt >= guid);
// Invalid Uuids are the "least".
EXPECT_FALSE(guid_invalid == guid);
EXPECT_TRUE(guid_invalid != guid);
EXPECT_TRUE(guid_invalid < guid);
EXPECT_TRUE(guid_invalid <= guid);
EXPECT_FALSE(guid_invalid > guid);
EXPECT_FALSE(guid_invalid >= guid);
}
TEST(UuidTest, FormatRandomDataAsV4) {
static constexpr uint64_t bytes1a[] = {0x0123456789abcdefull,
0x5a5a5a5aa5a5a5a5ull};
static constexpr uint64_t bytes1b[] = {bytes1a[0], bytes1a[1]};
static constexpr uint64_t bytes2[] = {0xfffffffffffffffdull,
0xfffffffffffffffeull};
static constexpr uint64_t bytes3[] = {0xfffffffffffffffdull,
0xfffffffffffffffcull};
const Uuid guid1a =
Uuid::FormatRandomDataAsV4ForTesting(as_bytes(make_span(bytes1a)));
const Uuid guid1b =
Uuid::FormatRandomDataAsV4ForTesting(as_bytes(make_span(bytes1b)));
const Uuid guid2 =
Uuid::FormatRandomDataAsV4ForTesting(as_bytes(make_span(bytes2)));
const Uuid guid3 =
Uuid::FormatRandomDataAsV4ForTesting(as_bytes(make_span(bytes3)));
EXPECT_TRUE(guid1a.is_valid());
EXPECT_TRUE(guid1b.is_valid());
EXPECT_TRUE(guid2.is_valid());
EXPECT_TRUE(guid3.is_valid());
// The same input should give the same Uuid.
EXPECT_EQ(guid1a, guid1b);
EXPECT_NE(guid1a, guid2);
EXPECT_NE(guid1a, guid3);
EXPECT_NE(guid2, guid3);
}
} // namespace base
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