1 files changed, 93 insertions, 0 deletions
diff --git a/test/util/posix_error.cc b/test/util/posix_error.cc
new file mode 100644
index 000000000..9db72c6de
--- /dev/null
+++ b/test/util/posix_error.cc
@@ -0,0 +1,93 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+#include "test/util/posix_error.h"
+
+#include <cassert>
+#include <cerrno>
+#include <cstring>
+#include <string>
+
+#include "absl/strings/str_cat.h"
+
+namespace gvisor {
+namespace testing {
+
+std::string PosixError::ToString() const {
+  if (ok()) {
+    return "No Error";
+  }
+
+  std::string ret;
+
+  char strerrno_buf[1024] = {};
+  char* msg = nullptr;
+  if ((msg = strerror_r(errno_, strerrno_buf, sizeof(strerrno_buf))) ==
+      nullptr) {
+    ret = absl::StrCat("PosixError(errno=", errno_, " strerror_r FAILED)");
+  } else {
+    ret = absl::StrCat("PosixError(errno=", errno_, " ", msg, ")");
+  }
+
+  if (!msg_.empty()) {
+    ret.append(" ");
+    ret.append(msg_);
+  }
+
+  return ret;
+}
+
+::std::ostream& operator<<(::std::ostream& os, const PosixError& e) {
+  os << e.ToString();
+  return os;
+}
+
+void PosixErrorIsMatcherCommonImpl::DescribeTo(std::ostream* os) const {
+  *os << "has an errno value that ";
+  code_matcher_.DescribeTo(os);
+  *os << ", and has an error message that ";
+  message_matcher_.DescribeTo(os);
+}
+
+void PosixErrorIsMatcherCommonImpl::DescribeNegationTo(std::ostream* os) const {
+  *os << "has an errno value that ";
+  code_matcher_.DescribeNegationTo(os);
+  *os << ", or has an error message that ";
+  message_matcher_.DescribeNegationTo(os);
+}
+
+bool PosixErrorIsMatcherCommonImpl::MatchAndExplain(
+    const PosixError& error,
+    ::testing::MatchResultListener* result_listener) const {
+  ::testing::StringMatchResultListener inner_listener;
+
+  inner_listener.Clear();
+  if (!code_matcher_.MatchAndExplain(error.errno_value(), &inner_listener)) {
+    *result_listener << (inner_listener.str().empty()
+                             ? "whose errno value is wrong"
+                             : "which has a errno value " +
+                                   inner_listener.str());
+    return false;
+  }
+
+  if (!message_matcher_.Matches(error.error_message())) {
+    *result_listener << "whose error message is wrong";
+    return false;
+  }
+
+  return true;
+}
+
+}  // namespace testing
+}  // namespace gvisor