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Diffstat (limited to 'test/util/posix_error.h')
| -rw-r--r-- | test/util/posix_error.h | 462 |
1 files changed, 0 insertions, 462 deletions
diff --git a/test/util/posix_error.h b/test/util/posix_error.h deleted file mode 100644 index ad666bce0..000000000 --- a/test/util/posix_error.h +++ /dev/null @@ -1,462 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#ifndef GVISOR_TEST_UTIL_POSIX_ERROR_H_ -#define GVISOR_TEST_UTIL_POSIX_ERROR_H_ - -#include <string> - -#include "gmock/gmock.h" -#include "absl/base/attributes.h" -#include "absl/strings/string_view.h" -#include "absl/types/variant.h" -#include "test/util/logging.h" - -namespace gvisor { -namespace testing { - -class PosixErrorIsMatcherCommonImpl; - -template <typename T> -class PosixErrorOr; - -class ABSL_MUST_USE_RESULT PosixError { - public: - PosixError() {} - explicit PosixError(int errno_value) : errno_(errno_value) {} - PosixError(int errno_value, std::string msg) - : errno_(errno_value), msg_(std::move(msg)) {} - - PosixError(PosixError&& other) = default; - PosixError& operator=(PosixError&& other) = default; - PosixError(const PosixError&) = default; - PosixError& operator=(const PosixError&) = default; - - bool ok() const { return errno_ == 0; } - - // Returns a reference to *this to make matchers compatible with - // PosixErrorOr. - const PosixError& error() const { return *this; } - - std::string error_message() const { return msg_; } - - // ToString produces a full string representation of this posix error - // including the printable representation of the errno and the error message. - std::string ToString() const; - - // Ignores any errors. This method does nothing except potentially suppress - // complaints from any tools that are checking that errors are not dropped on - // the floor. - void IgnoreError() const {} - - private: - int errno_value() const { return errno_; } - int errno_ = 0; - std::string msg_; - - friend class PosixErrorIsMatcherCommonImpl; - - template <typename T> - friend class PosixErrorOr; -}; - -template <typename T> -class ABSL_MUST_USE_RESULT PosixErrorOr { - public: - // A PosixErrorOr will check fail if it is constructed with NoError(). - PosixErrorOr(const PosixError& error); - PosixErrorOr(const T& value); - PosixErrorOr(T&& value); - - PosixErrorOr(PosixErrorOr&& other) = default; - PosixErrorOr& operator=(PosixErrorOr&& other) = default; - PosixErrorOr(const PosixErrorOr&) = default; - PosixErrorOr& operator=(const PosixErrorOr&) = default; - - // Conversion copy/move constructor, T must be convertible from U. - template <typename U> - friend class PosixErrorOr; - - template <typename U> - PosixErrorOr(PosixErrorOr<U> other); - - template <typename U> - PosixErrorOr& operator=(PosixErrorOr<U> other); - - // Return a reference to the error or NoError(). - PosixError error() const; - - // Returns this->error().error_message(); - std::string error_message() const; - - // Returns true if this PosixErrorOr contains some T. - bool ok() const; - - // Returns a reference to our current value, or CHECK-fails if !this->ok(). - const T& ValueOrDie() const&; - T& ValueOrDie() &; - const T&& ValueOrDie() const&&; - T&& ValueOrDie() &&; - - // Ignores any errors. This method does nothing except potentially suppress - // complaints from any tools that are checking that errors are not dropped on - // the floor. - void IgnoreError() const {} - - private: - int errno_value() const; - absl::variant<T, PosixError> value_; - - friend class PosixErrorIsMatcherCommonImpl; -}; - -template <typename T> -PosixErrorOr<T>::PosixErrorOr(const PosixError& error) : value_(error) { - TEST_CHECK_MSG( - !error.ok(), - "Constructing PosixErrorOr with NoError, eg. errno 0 is not allowed."); -} - -template <typename T> -PosixErrorOr<T>::PosixErrorOr(const T& value) : value_(value) {} - -template <typename T> -PosixErrorOr<T>::PosixErrorOr(T&& value) : value_(std::move(value)) {} - -// Conversion copy/move constructor, T must be convertible from U. -template <typename T> -template <typename U> -inline PosixErrorOr<T>::PosixErrorOr(PosixErrorOr<U> other) { - if (absl::holds_alternative<U>(other.value_)) { - // T is convertible from U. - value_ = absl::get<U>(std::move(other.value_)); - } else if (absl::holds_alternative<PosixError>(other.value_)) { - value_ = absl::get<PosixError>(std::move(other.value_)); - } else { - TEST_CHECK_MSG(false, "PosixErrorOr does not contain PosixError or value"); - } -} - -template <typename T> -template <typename U> -inline PosixErrorOr<T>& PosixErrorOr<T>::operator=(PosixErrorOr<U> other) { - if (absl::holds_alternative<U>(other.value_)) { - // T is convertible from U. - value_ = absl::get<U>(std::move(other.value_)); - } else if (absl::holds_alternative<PosixError>(other.value_)) { - value_ = absl::get<PosixError>(std::move(other.value_)); - } else { - TEST_CHECK_MSG(false, "PosixErrorOr does not contain PosixError or value"); - } - return *this; -} - -template <typename T> -PosixError PosixErrorOr<T>::error() const { - if (!absl::holds_alternative<PosixError>(value_)) { - return PosixError(); - } - return absl::get<PosixError>(value_); -} - -template <typename T> -int PosixErrorOr<T>::errno_value() const { - return error().errno_value(); -} - -template <typename T> -std::string PosixErrorOr<T>::error_message() const { - return error().error_message(); -} - -template <typename T> -bool PosixErrorOr<T>::ok() const { - return absl::holds_alternative<T>(value_); -} - -template <typename T> -const T& PosixErrorOr<T>::ValueOrDie() const& { - TEST_CHECK(absl::holds_alternative<T>(value_)); - return absl::get<T>(value_); -} - -template <typename T> -T& PosixErrorOr<T>::ValueOrDie() & { - TEST_CHECK(absl::holds_alternative<T>(value_)); - return absl::get<T>(value_); -} - -template <typename T> -const T&& PosixErrorOr<T>::ValueOrDie() const&& { - TEST_CHECK(absl::holds_alternative<T>(value_)); - return std::move(absl::get<T>(value_)); -} - -template <typename T> -T&& PosixErrorOr<T>::ValueOrDie() && { - TEST_CHECK(absl::holds_alternative<T>(value_)); - return std::move(absl::get<T>(value_)); -} - -extern ::std::ostream& operator<<(::std::ostream& os, const PosixError& e); - -template <typename T> -::std::ostream& operator<<(::std::ostream& os, const PosixErrorOr<T>& e) { - os << e.error(); - return os; -} - -// NoError is a PosixError that represents a successful state, i.e. No Error. -inline PosixError NoError() { return PosixError(); } - -// Monomorphic implementation of matcher IsPosixErrorOk() for a given type T. -// T can be PosixError, PosixErrorOr<>, or a reference to either of them. -template <typename T> -class MonoPosixErrorIsOkMatcherImpl : public ::testing::MatcherInterface<T> { - public: - void DescribeTo(std::ostream* os) const override { *os << "is OK"; } - void DescribeNegationTo(std::ostream* os) const override { - *os << "is not OK"; - } - bool MatchAndExplain(T actual_value, - ::testing::MatchResultListener*) const override { - return actual_value.ok(); - } -}; - -// Implements IsPosixErrorOkMatcher() as a polymorphic matcher. -class IsPosixErrorOkMatcher { - public: - template <typename T> - operator ::testing::Matcher<T>() const { // NOLINT - return MakeMatcher(new MonoPosixErrorIsOkMatcherImpl<T>()); - } -}; - -// Monomorphic implementation of a matcher for a PosixErrorOr. -template <typename PosixErrorOrType> -class IsPosixErrorOkAndHoldsMatcherImpl - : public ::testing::MatcherInterface<PosixErrorOrType> { - public: - using ValueType = typename std::remove_reference<decltype( - std::declval<PosixErrorOrType>().ValueOrDie())>::type; - - template <typename InnerMatcher> - explicit IsPosixErrorOkAndHoldsMatcherImpl(InnerMatcher&& inner_matcher) - : inner_matcher_(::testing::SafeMatcherCast<const ValueType&>( - std::forward<InnerMatcher>(inner_matcher))) {} - - void DescribeTo(std::ostream* os) const override { - *os << "is OK and has a value that "; - inner_matcher_.DescribeTo(os); - } - - void DescribeNegationTo(std::ostream* os) const override { - *os << "isn't OK or has a value that "; - inner_matcher_.DescribeNegationTo(os); - } - - bool MatchAndExplain( - PosixErrorOrType actual_value, - ::testing::MatchResultListener* listener) const override { - // We can't extract the value if it doesn't contain one. - if (!actual_value.ok()) { - return false; - } - - ::testing::StringMatchResultListener inner_listener; - const bool matches = inner_matcher_.MatchAndExplain( - actual_value.ValueOrDie(), &inner_listener); - const std::string inner_explanation = inner_listener.str(); - *listener << "has a value " - << ::testing::PrintToString(actual_value.ValueOrDie()); - - if (!inner_explanation.empty()) { - *listener << " " << inner_explanation; - } - return matches; - } - - private: - const ::testing::Matcher<const ValueType&> inner_matcher_; -}; - -// Implements IsOkAndHolds() as a polymorphic matcher. -template <typename InnerMatcher> -class IsPosixErrorOkAndHoldsMatcher { - public: - explicit IsPosixErrorOkAndHoldsMatcher(InnerMatcher inner_matcher) - : inner_matcher_(std::move(inner_matcher)) {} - - // Converts this polymorphic matcher to a monomorphic one of the given type. - // PosixErrorOrType can be either PosixErrorOr<T> or a reference to - // PosixErrorOr<T>. - template <typename PosixErrorOrType> - operator ::testing::Matcher<PosixErrorOrType>() const { // NOLINT - return ::testing::MakeMatcher( - new IsPosixErrorOkAndHoldsMatcherImpl<PosixErrorOrType>( - inner_matcher_)); - } - - private: - const InnerMatcher inner_matcher_; -}; - -// PosixErrorIs() is a polymorphic matcher. This class is the common -// implementation of it shared by all types T where PosixErrorIs() can be -// used as a Matcher<T>. -class PosixErrorIsMatcherCommonImpl { - public: - PosixErrorIsMatcherCommonImpl( - ::testing::Matcher<int> code_matcher, - ::testing::Matcher<const std::string&> message_matcher) - : code_matcher_(std::move(code_matcher)), - message_matcher_(std::move(message_matcher)) {} - - void DescribeTo(std::ostream* os) const; - - void DescribeNegationTo(std::ostream* os) const; - - bool MatchAndExplain(const PosixError& error, - ::testing::MatchResultListener* result_listener) const; - - template <typename T> - bool MatchAndExplain(const PosixErrorOr<T>& error_or, - ::testing::MatchResultListener* result_listener) const { - if (error_or.ok()) { - *result_listener << "has a value " - << ::testing::PrintToString(error_or.ValueOrDie()); - return false; - } - - return MatchAndExplain(error_or.error(), result_listener); - } - - private: - const ::testing::Matcher<int> code_matcher_; - const ::testing::Matcher<const std::string&> message_matcher_; -}; - -// Monomorphic implementation of matcher PosixErrorIs() for a given type -// T. T can be PosixError, PosixErrorOr<>, or a reference to either of them. -template <typename T> -class MonoPosixErrorIsMatcherImpl : public ::testing::MatcherInterface<T> { - public: - explicit MonoPosixErrorIsMatcherImpl( - PosixErrorIsMatcherCommonImpl common_impl) - : common_impl_(std::move(common_impl)) {} - - void DescribeTo(std::ostream* os) const override { - common_impl_.DescribeTo(os); - } - - void DescribeNegationTo(std::ostream* os) const override { - common_impl_.DescribeNegationTo(os); - } - - bool MatchAndExplain( - T actual_value, - ::testing::MatchResultListener* result_listener) const override { - return common_impl_.MatchAndExplain(actual_value, result_listener); - } - - private: - PosixErrorIsMatcherCommonImpl common_impl_; -}; - -inline ::testing::Matcher<int> ToErrorCodeMatcher( - const ::testing::Matcher<int>& m) { - return m; -} - -// Implements PosixErrorIs() as a polymorphic matcher. -class PosixErrorIsMatcher { - public: - template <typename ErrorCodeMatcher> - PosixErrorIsMatcher(ErrorCodeMatcher&& code_matcher, - ::testing::Matcher<const std::string&> message_matcher) - : common_impl_( - ToErrorCodeMatcher(std::forward<ErrorCodeMatcher>(code_matcher)), - std::move(message_matcher)) {} - - // Converts this polymorphic matcher to a monomorphic matcher of the - // given type. T can be StatusOr<>, Status, or a reference to - // either of them. - template <typename T> - operator ::testing::Matcher<T>() const { // NOLINT - return MakeMatcher(new MonoPosixErrorIsMatcherImpl<T>(common_impl_)); - } - - private: - const PosixErrorIsMatcherCommonImpl common_impl_; -}; - -// Returns a gMock matcher that matches a PosixError or PosixErrorOr<> whose -// whose error code matches code_matcher, and whose error message matches -// message_matcher. -template <typename ErrorCodeMatcher> -PosixErrorIsMatcher PosixErrorIs( - ErrorCodeMatcher&& code_matcher, - ::testing::Matcher<const std::string&> message_matcher) { - return PosixErrorIsMatcher(std::forward<ErrorCodeMatcher>(code_matcher), - std::move(message_matcher)); -} - -// Returns a gMock matcher that matches a PosixErrorOr<> which is ok() and -// value matches the inner matcher. -template <typename InnerMatcher> -IsPosixErrorOkAndHoldsMatcher<typename std::decay<InnerMatcher>::type> -IsPosixErrorOkAndHolds(InnerMatcher&& inner_matcher) { - return IsPosixErrorOkAndHoldsMatcher<typename std::decay<InnerMatcher>::type>( - std::forward<InnerMatcher>(inner_matcher)); -} - -// Internal helper for concatenating macro values. -#define POSIX_ERROR_IMPL_CONCAT_INNER_(x, y) x##y -#define POSIX_ERROR_IMPL_CONCAT_(x, y) POSIX_ERROR_IMPL_CONCAT_INNER_(x, y) - -#define POSIX_ERROR_IMPL_ASSIGN_OR_RETURN_(posixerroror, lhs, rexpr) \ - auto posixerroror = (rexpr); \ - if (!posixerroror.ok()) { \ - return (posixerroror.error()); \ - } \ - lhs = std::move(posixerroror).ValueOrDie() - -#define EXPECT_NO_ERRNO(expression) \ - EXPECT_THAT(expression, IsPosixErrorOkMatcher()) -#define ASSERT_NO_ERRNO(expression) \ - ASSERT_THAT(expression, IsPosixErrorOkMatcher()) - -#define ASSIGN_OR_RETURN_ERRNO(lhs, rexpr) \ - POSIX_ERROR_IMPL_ASSIGN_OR_RETURN_( \ - POSIX_ERROR_IMPL_CONCAT_(_status_or_value, __LINE__), lhs, rexpr) - -#define RETURN_IF_ERRNO(s) \ - do { \ - if (!s.ok()) { \ - return s; \ - } \ - } while (false); - -#define ASSERT_NO_ERRNO_AND_VALUE(expr) \ - ({ \ - auto _expr_result = (expr); \ - ASSERT_NO_ERRNO(_expr_result); \ - std::move(_expr_result).ValueOrDie(); \ - }) - -} // namespace testing -} // namespace gvisor - -#endif // GVISOR_TEST_UTIL_POSIX_ERROR_H_ |