1 files changed, 217 insertions, 0 deletions
diff --git a/absl/log/internal/test_matchers.cc b/absl/log/internal/test_matchers.cc
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+++ b/absl/log/internal/test_matchers.cc
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+//
+// Copyright 2022 The Abseil 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
+//
+//      https://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 "absl/log/internal/test_matchers.h"
+
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <type_traits>
+#include <utility>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/log/internal/test_helpers.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+using ::testing::_;
+using ::testing::AllOf;
+using ::testing::Ge;
+using ::testing::HasSubstr;
+using ::testing::MakeMatcher;
+using ::testing::Matcher;
+using ::testing::MatcherInterface;
+using ::testing::MatchResultListener;
+using ::testing::Not;
+using ::testing::Property;
+using ::testing::ResultOf;
+using ::testing::Truly;
+
+class AsStringImpl final
+    : public MatcherInterface<absl::string_view> {
+ public:
+  explicit AsStringImpl(
+      const Matcher<const std::string&>& str_matcher)
+      : str_matcher_(str_matcher) {}
+  bool MatchAndExplain(
+      absl::string_view actual,
+      MatchResultListener* listener) const override {
+    return str_matcher_.MatchAndExplain(std::string(actual), listener);
+  }
+  void DescribeTo(std::ostream* os) const override {
+    return str_matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(std::ostream* os) const override {
+    return str_matcher_.DescribeNegationTo(os);
+  }
+
+ private:
+  const Matcher<const std::string&> str_matcher_;
+};
+
+class MatchesOstreamImpl final
+    : public MatcherInterface<absl::string_view> {
+ public:
+  explicit MatchesOstreamImpl(std::string expected)
+      : expected_(std::move(expected)) {}
+  bool MatchAndExplain(absl::string_view actual,
+                       MatchResultListener*) const override {
+    return actual == expected_;
+  }
+  void DescribeTo(std::ostream* os) const override {
+    *os << "matches the contents of the ostringstream, which are \""
+        << expected_ << "\"";
+  }
+
+  void DescribeNegationTo(std::ostream* os) const override {
+    *os << "does not match the contents of the ostringstream, which are \""
+        << expected_ << "\"";
+  }
+
+ private:
+  const std::string expected_;
+};
+}  // namespace
+
+Matcher<absl::string_view> AsString(
+    const Matcher<const std::string&>& str_matcher) {
+  return MakeMatcher(new AsStringImpl(str_matcher));
+}
+
+Matcher<const absl::LogEntry&> SourceFilename(
+    const Matcher<absl::string_view>& source_filename) {
+  return Property("source_filename", &absl::LogEntry::source_filename,
+                  source_filename);
+}
+
+Matcher<const absl::LogEntry&> SourceBasename(
+    const Matcher<absl::string_view>& source_basename) {
+  return Property("source_basename", &absl::LogEntry::source_basename,
+                  source_basename);
+}
+
+Matcher<const absl::LogEntry&> SourceLine(
+    const Matcher<int>& source_line) {
+  return Property("source_line", &absl::LogEntry::source_line, source_line);
+}
+
+Matcher<const absl::LogEntry&> Prefix(
+    const Matcher<bool>& prefix) {
+  return Property("prefix", &absl::LogEntry::prefix, prefix);
+}
+
+Matcher<const absl::LogEntry&> LogSeverity(
+    const Matcher<absl::LogSeverity>& log_severity) {
+  return Property("log_severity", &absl::LogEntry::log_severity, log_severity);
+}
+
+Matcher<const absl::LogEntry&> Timestamp(
+    const Matcher<absl::Time>& timestamp) {
+  return Property("timestamp", &absl::LogEntry::timestamp, timestamp);
+}
+
+Matcher<const absl::LogEntry&> TimestampInMatchWindow() {
+  return Property("timestamp", &absl::LogEntry::timestamp,
+                  AllOf(Ge(absl::Now()), Truly([](absl::Time arg) {
+                          return arg <= absl::Now();
+                        })));
+}
+
+Matcher<const absl::LogEntry&> ThreadID(
+    const Matcher<absl::LogEntry::tid_t>& tid) {
+  return Property("tid", &absl::LogEntry::tid, tid);
+}
+
+Matcher<const absl::LogEntry&> TextMessageWithPrefixAndNewline(
+    const Matcher<absl::string_view>&
+        text_message_with_prefix_and_newline) {
+  return Property("text_message_with_prefix_and_newline",
+                  &absl::LogEntry::text_message_with_prefix_and_newline,
+                  text_message_with_prefix_and_newline);
+}
+
+Matcher<const absl::LogEntry&> TextMessageWithPrefix(
+    const Matcher<absl::string_view>& text_message_with_prefix) {
+  return Property("text_message_with_prefix",
+                  &absl::LogEntry::text_message_with_prefix,
+                  text_message_with_prefix);
+}
+
+Matcher<const absl::LogEntry&> TextMessage(
+    const Matcher<absl::string_view>& text_message) {
+  return Property("text_message", &absl::LogEntry::text_message, text_message);
+}
+
+Matcher<const absl::LogEntry&> TextPrefix(
+    const Matcher<absl::string_view>& text_prefix) {
+  return ResultOf(
+      [](const absl::LogEntry& entry) {
+        absl::string_view msg = entry.text_message_with_prefix();
+        msg.remove_suffix(entry.text_message().size());
+        return msg;
+      },
+      text_prefix);
+}
+Matcher<const absl::LogEntry&> RawEncodedMessage(
+    const Matcher<absl::string_view>& raw_encoded_message) {
+  return Property("encoded_message", &absl::LogEntry::encoded_message,
+                  raw_encoded_message);
+}
+
+Matcher<const absl::LogEntry&> Verbosity(
+    const Matcher<int>& verbosity) {
+  return Property("verbosity", &absl::LogEntry::verbosity, verbosity);
+}
+
+Matcher<const absl::LogEntry&> Stacktrace(
+    const Matcher<absl::string_view>& stacktrace) {
+  return Property("stacktrace", &absl::LogEntry::stacktrace, stacktrace);
+}
+
+Matcher<absl::string_view> MatchesOstream(
+    const std::ostringstream& stream) {
+  return MakeMatcher(new MatchesOstreamImpl(stream.str()));
+}
+
+// We need to validate what is and isn't logged as the process dies due to
+// `FATAL`, `QFATAL`, `CHECK`, etc., but assertions inside a death test
+// subprocess don't directly affect the pass/fail status of the parent process.
+// Instead, we use the mock actions `DeathTestExpectedLogging` and
+// `DeathTestUnexpectedLogging` to write specific phrases to `stderr` that we
+// can validate in the parent process using this matcher.
+Matcher<const std::string&> DeathTestValidateExpectations() {
+  if (log_internal::LoggingEnabledAt(absl::LogSeverity::kFatal)) {
+    return Matcher<const std::string&>(
+        AllOf(HasSubstr("Mock received expected entry"),
+              Not(HasSubstr("Mock received unexpected entry"))));
+  }
+  // If `FATAL` logging is disabled, neither message should have been written.
+  return Matcher<const std::string&>(
+      AllOf(Not(HasSubstr("Mock received expected entry")),
+            Not(HasSubstr("Mock received unexpected entry"))));
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl