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base / test / fuzztest_support.h [blame]
// 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.
#ifndef BASE_TEST_FUZZTEST_SUPPORT_H_
#define BASE_TEST_FUZZTEST_SUPPORT_H_
#include <optional>
#include <string>
#include <tuple>
#include <vector>
#include "base/containers/to_vector.h"
#include "base/types/optional_ref.h"
#include "base/values.h"
#include "third_party/fuzztest/src/fuzztest/fuzztest.h"
namespace {
template <typename T>
requires std::copy_constructible<T>
std::optional<std::tuple<T>> Wrap(base::optional_ref<const T> maybe_value) {
return maybe_value.has_value() ? std::optional(std::tuple<T>{*maybe_value})
: std::nullopt;
}
auto ArbitraryValueNull() {
return fuzztest::ReversibleMap(
[] { return base::Value(); },
[](const base::Value& value) { return std::optional<std::tuple<>>{}; });
}
auto ArbitraryValueBool() {
return fuzztest::ReversibleMap(
[](bool boolean) { return base::Value(boolean); },
[](const base::Value& value) { return Wrap<bool>(value.GetIfBool()); },
fuzztest::Arbitrary<bool>());
}
auto ArbitraryValueInt() {
return fuzztest::ReversibleMap(
[](int number) { return base::Value(number); },
[](const base::Value& value) { return Wrap<int>(value.GetIfInt()); },
fuzztest::Arbitrary<int>());
}
auto ArbitraryValueDouble() {
return fuzztest::ReversibleMap(
[](double number) { return base::Value(number); },
[](const base::Value& value) {
return Wrap<double>(value.GetIfDouble());
},
fuzztest::Finite<double>());
}
auto ArbitraryValueString() {
return fuzztest::ReversibleMap(
[](std::string string) { return base::Value(string); },
[](const base::Value& value) {
return Wrap<std::string>(value.GetIfString());
},
fuzztest::String());
}
auto ArbitraryValueBlob() {
return fuzztest::ReversibleMap(
[](std::vector<uint8_t> blob) { return base::Value(blob); },
[](const base::Value& value) {
return Wrap<std::vector<uint8_t>>(value.GetIfBlob());
},
fuzztest::Arbitrary<std::vector<uint8_t>>());
}
auto ArbitraryValueList(fuzztest::Domain<base::Value> entry_domain) {
return fuzztest::ReversibleMap(
[](std::vector<base::Value> values) {
base::Value::List list;
for (auto& value : values) {
list.Append(std::move(value));
}
return base::Value(std::move(list));
},
[](const base::Value& value) {
auto maybe_list = base::optional_ref(value.GetIfList());
return maybe_list.has_value()
? std::make_optional(std::tuple{
base::ToVector(*maybe_list, &base::Value::Clone)})
: std::nullopt;
},
fuzztest::ContainerOf<std::vector<base::Value>>(entry_domain));
}
auto ArbitraryValueDict(fuzztest::Domain<base::Value> value_domain) {
return fuzztest::ReversibleMap(
[](std::vector<std::pair<std::string, base::Value>> e) {
return base::Value(base::Value::Dict(std::make_move_iterator(e.begin()),
std::make_move_iterator(e.end())));
},
[](const base::Value& value) {
auto maybe_dict = base::optional_ref(value.GetIfDict());
return maybe_dict.has_value()
? std::make_optional(std::tuple{base::ToVector(
*maybe_dict,
[](const auto& entry) {
return std::make_pair(entry.first,
entry.second.Clone());
})})
: std::nullopt;
},
fuzztest::ContainerOf<std::vector<std::pair<std::string, base::Value>>>(
fuzztest::PairOf(fuzztest::String(), value_domain)));
}
fuzztest::Domain<base::Value> ArbitraryValue() {
fuzztest::DomainBuilder builder;
builder.Set<base::Value>(
"value",
fuzztest::OneOf(ArbitraryValueNull(), ArbitraryValueBool(),
ArbitraryValueInt(), ArbitraryValueDouble(),
ArbitraryValueString(), ArbitraryValueBlob(),
ArbitraryValueList(builder.Get<base::Value>("value")),
ArbitraryValueDict(builder.Get<base::Value>("value"))));
return std::move(builder).Finalize<base::Value>("value");
}
} // namespace
template <>
class fuzztest::internal::ArbitraryImpl<base::Value>
: public fuzztest::Domain<base::Value> {
public:
ArbitraryImpl() : fuzztest::Domain<base::Value>(ArbitraryValue()) {}
};
template <>
class fuzztest::internal::ArbitraryImpl<base::Value::Dict>
: public fuzztest::internal::ReversibleMapImpl<
base::Value::Dict (*)(
std::vector<std::pair<std::string, base::Value>>),
std::optional<
std::tuple<std::vector<std::pair<std::string, base::Value>>>> (*)(
const base::Value::Dict&),
fuzztest::internal::ArbitraryImpl<
std::vector<std::pair<std::string, base::Value>>>> {
public:
ArbitraryImpl()
: fuzztest::internal::ReversibleMapImpl<
base::Value::Dict (*)(
std::vector<std::pair<std::string, base::Value>>),
std::optional<std::tuple<
std::vector<std::pair<std::string, base::Value>>>> (*)(
const base::Value::Dict&),
fuzztest::internal::ArbitraryImpl<
std::vector<std::pair<std::string, base::Value>>>>(
[](std::vector<std::pair<std::string, base::Value>> e) {
return base::Value::Dict(std::make_move_iterator(e.begin()),
std::make_move_iterator(e.end()));
},
[](const base::Value::Dict& value) {
return std::make_optional(
std::tuple{base::ToVector(value, [](const auto& entry) {
return std::make_pair(entry.first, entry.second.Clone());
})});
},
fuzztest::internal::ArbitraryImpl<
std::vector<std::pair<std::string, base::Value>>>()) {}
};
#endif // BASE_TEST_FUZZTEST_SUPPORT_H_