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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/canvas/canvas2d/identifiability_study_helper.h"
#include <stdint.h>
#include <array>
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/common/privacy_budget/identifiable_token_builder.h"
// GoogleTest macros trigger a bug in IWYU:
// https://github.com/include-what-you-use/include-what-you-use/issues/1546
// IWYU pragma: no_include <string>
namespace blink {
namespace {
constexpr uint64_t max_uint = UINT64_C(0xFFFFFFFFFFFFFFFF);
}
TEST(IdentifiabilityStudyHelperTest, GetTokenTwice) {
IdentifiabilityStudyHelper helper;
helper.UpdateBuilder(1246);
EXPECT_EQ(helper.GetToken(), helper.GetToken());
}
TEST(IdentifiabilityStudyHelperTest, UpdateBuilderAfterGetToken) {
IdentifiabilityStudyHelper helper1;
IdentifiabilityStudyHelper helper2;
helper1.UpdateBuilder(1246);
helper2.UpdateBuilder(1246);
helper1.GetToken();
helper1.UpdateBuilder(52);
helper2.UpdateBuilder(52);
EXPECT_EQ(helper1.GetToken(), helper1.GetToken());
}
TEST(IdentifiabilityStudyHelperTest, SameHashAsIdentifiableTokenBuilder_Empty) {
IdentifiableTokenBuilder builder;
IdentifiabilityStudyHelper helper;
EXPECT_EQ(helper.GetToken(), builder.GetToken());
}
TEST(IdentifiabilityStudyHelperTest,
SameHashAsIdentifiableTokenBuilder_Aligned) {
std::array<uint64_t, 8> tokens = {0, 1, max_uint, 45, 83, 123, 0, 3567};
IdentifiabilityStudyHelper helper1;
IdentifiabilityStudyHelper helper2;
IdentifiableTokenBuilder builder;
helper1.UpdateBuilder(tokens[0], tokens[1], tokens[2], tokens[3], tokens[4],
tokens[5], tokens[6], tokens[7]);
for (uint64_t item : tokens) {
helper2.UpdateBuilder(item);
builder.AddToken(item);
}
EXPECT_EQ(helper1.GetToken(), builder.GetToken());
EXPECT_EQ(helper2.GetToken(), builder.GetToken());
}
TEST(IdentifiabilityStudyHelperTest,
SameHashAsIdentifiableTokenBuilder_Unaligned) {
std::array<uint64_t, 10> tokens = {0, 1, max_uint, 45, 83,
123, 0, 3567, max_uint, 2};
IdentifiabilityStudyHelper helper1;
IdentifiabilityStudyHelper helper2;
IdentifiableTokenBuilder builder;
helper1.UpdateBuilder(tokens[0], tokens[1], tokens[2], tokens[3], tokens[4],
tokens[5], tokens[6], tokens[7], tokens[8], tokens[9]);
for (uint64_t item : tokens) {
helper2.UpdateBuilder(item);
builder.AddToken(item);
}
EXPECT_EQ(helper1.GetToken(), builder.GetToken());
EXPECT_EQ(helper2.GetToken(), builder.GetToken());
}
} // namespace blink
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