Add functionality to prune old crash reports from the database.

client/prune_crash_reports_test.cc

Index: client/prune_crash_reports_test.cc
diff --git a/client/prune_crash_reports_test.cc b/client/prune_crash_reports_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c825c810cbbd2f92af1b9257beaeef451fcaafa
--- /dev/null
+++ b/client/prune_crash_reports_test.cc
@@ -0,0 +1,236 @@
+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// 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 "client/prune_crash_reports.h"
+
+#include <stdlib.h>
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+#include "base/rand_util.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "test/scoped_temp_dir.h"
+#include "util/file/file_io.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+class MockDatabase : public CrashReportDatabase {
+ public:
+  // CrashReportDatabase:
+  MOCK_METHOD0(GetSettings, Settings*());
+  MOCK_METHOD1(PrepareNewCrashReport, OperationStatus(NewReport**));
+  MOCK_METHOD2(FinishedWritingCrashReport, OperationStatus(NewReport*, UUID*));
+  MOCK_METHOD1(ErrorWritingCrashReport, OperationStatus(NewReport*));
+  MOCK_METHOD2(LookUpCrashReport, OperationStatus(const UUID&, Report*));
+  MOCK_METHOD1(GetPendingReports, OperationStatus(std::vector<Report>*));
+  MOCK_METHOD1(GetCompletedReports, OperationStatus(std::vector<Report>*));
+  MOCK_METHOD2(GetReportForUploading,
+               OperationStatus(const UUID&, const Report**));
+  MOCK_METHOD3(RecordUploadAttempt,
+               OperationStatus(const Report*, bool, const std::string&));
+  MOCK_METHOD1(SkipReportUpload, OperationStatus(const UUID&));
+  MOCK_METHOD1(DeleteReport, OperationStatus(const UUID&));
+};
+
+time_t NDaysAgo(int num_days) {
+  return time(nullptr) - (num_days * 60 * 60 * 24);
+}
+
+TEST(PruneCrashReports, AgeCondition) {
+  CrashReportDatabase::Report report_80_days;
+  report_80_days.creation_time = NDaysAgo(80);
+
+  CrashReportDatabase::Report report_10_days;
+  report_10_days.creation_time = NDaysAgo(10);
+
+  CrashReportDatabase::Report report_30_days;
+  report_30_days.creation_time = NDaysAgo(30);
+
+  AgePruneCondition condition(30);
+  EXPECT_TRUE(condition.ShouldPruneReport(report_80_days));
+  EXPECT_FALSE(condition.ShouldPruneReport(report_10_days));
+  EXPECT_FALSE(condition.ShouldPruneReport(report_30_days));
+}
+
+TEST(PruneCrashReports, SizeCondition) {
+  ScopedTempDir temp_dir;
+
+  CrashReportDatabase::Report report_1k;
+  report_1k.file_path = temp_dir.path().Append(FILE_PATH_LITERAL("file1024"));
+  CrashReportDatabase::Report report_3k;
+  report_3k.file_path = temp_dir.path().Append(FILE_PATH_LITERAL("file3072"));
+
+  {
+    ScopedFileHandle scoped_file_1k(
+        LoggingOpenFileForWrite(report_1k.file_path,
+                                FileWriteMode::kCreateOrFail,
+                                FilePermissions::kOwnerOnly));
+    ASSERT_TRUE(scoped_file_1k.is_valid());
+
+    std::string string;
+    for (int i = 0; i < 128; ++i)
+      string.push_back(static_cast<char>(i));
+
+    for (int i = 0; i < 1024; i += string.size()) {
+      ASSERT_TRUE(LoggingWriteFile(scoped_file_1k.get(),
+                                   string.c_str(), string.length()));
+    }
+
+    ScopedFileHandle scoped_file_3k(
+        LoggingOpenFileForWrite(report_3k.file_path,
+                                FileWriteMode::kCreateOrFail,
+                                FilePermissions::kOwnerOnly));
+    ASSERT_TRUE(scoped_file_3k.is_valid());
+
+    for (int i = 0; i < 3072; i += string.size()) {
+      ASSERT_TRUE(LoggingWriteFile(scoped_file_3k.get(),
+                                   string.c_str(), string.length()));
+    }
+  }
+
+  {
+    DatabaseSizePruneCondition condition(1);
+    EXPECT_FALSE(condition.ShouldPruneReport(report_1k));
+    EXPECT_TRUE(condition.ShouldPruneReport(report_1k));
+  }
+
+  {
+    DatabaseSizePruneCondition condition(1);
+    EXPECT_TRUE(condition.ShouldPruneReport(report_3k));
+  }
+
+  {
+    DatabaseSizePruneCondition condition(6);
+    EXPECT_FALSE(condition.ShouldPruneReport(report_3k));
+    EXPECT_FALSE(condition.ShouldPruneReport(report_3k));
+    EXPECT_TRUE(condition.ShouldPruneReport(report_1k));
+  }
+}
+
+class StaticCondition final : public PruneCondition {
+ public:
+  explicit StaticCondition(bool value) : value_(value), did_execute_(false) {}
+  ~StaticCondition() {}
+
+  bool ShouldPruneReport(const CrashReportDatabase::Report& report) override {
+    did_execute_ = true;
+    return value_;
+  }
+
+  bool did_execute() const { return did_execute_; }
+
+ private:
+  const bool value_;
+  bool did_execute_;
+
+  DISALLOW_COPY_AND_ASSIGN(StaticCondition);
+};
+
+TEST(PruneCrashReports, BinaryCondition) {
+  const struct {
+    const char* name;
+    BinaryPruneCondition::Operator op;
+    bool lhs_value;
+    bool rhs_value;
+    bool cond_result;
+    bool lhs_executed;
+    bool rhs_executed;
+  } kTests[] = {
+    {"false && false",
+     BinaryPruneCondition::AND, false, false,
+     false, true, false},
+    {"false && true",
+     BinaryPruneCondition::AND, false, true,
+     false, true, false},
+    {"true && false",
+     BinaryPruneCondition::AND, true, false,
+     false, true, true},
+    {"true && true",
+     BinaryPruneCondition::AND, true, true,
+     true, true, true},
+    {"false || false",
+     BinaryPruneCondition::OR, false, false,
+     false, true, true},
+    {"false || true",
+     BinaryPruneCondition::OR, false, true,
+     true, true, true},
+    {"true || false",
+     BinaryPruneCondition::OR, true, false,
+     true, true, false},
+    {"true || true",
+     BinaryPruneCondition::OR, true, true,
+     true, true, false},
+  };
+  for (const auto& test : kTests) {
+    SCOPED_TRACE(test.name);
+    auto lhs = new StaticCondition(test.lhs_value);
+    auto rhs = new StaticCondition(test.rhs_value);
+    BinaryPruneCondition condition(test.op, lhs, rhs);
+    CrashReportDatabase::Report report;
+    EXPECT_EQ(test.cond_result, condition.ShouldPruneReport(report));
+    EXPECT_EQ(test.lhs_executed, lhs->did_execute());
+    EXPECT_EQ(test.rhs_executed, rhs->did_execute());
+  }
+}
+
+MATCHER_P(TestUUID, data_1, "") {
+  return arg.data_1 == data_1;
+}
+
+TEST(PruneCrashReports, PruneOrder) {
+  using ::testing::_;
+  using ::testing::DoAll;
+  using ::testing::Return;
+  using ::testing::SetArgPointee;
+
+  std::vector<CrashReportDatabase::Report> reports;
+  for (int i = 0; i < 10; ++i) {
+    CrashReportDatabase::Report temp;
+    temp.uuid.data_1 = i;
+    temp.creation_time = NDaysAgo(i * 10);
+    reports.push_back(temp);
+  }
+  // The randomness from std::rand() is not, so use a better rand() instead.
+  std::random_shuffle(reports.begin(), reports.end(), [](int rand_max) {
+    return base::RandUint64() % rand_max;
+  });
+  std::vector<CrashReportDatabase::Report> pending_reports(
+      reports.begin(), reports.begin() + 5);
+  std::vector<CrashReportDatabase::Report> completed_reports(
+      reports.begin() + 5, reports.end());
+
+  MockDatabase db;
+  EXPECT_CALL(db, GetPendingReports(_)).WillOnce(DoAll(
+      SetArgPointee<0>(pending_reports),
+      Return(CrashReportDatabase::kNoError)));
+  EXPECT_CALL(db, GetCompletedReports(_)).WillOnce(DoAll(
+      SetArgPointee<0>(completed_reports),
+      Return(CrashReportDatabase::kNoError)));
+  for (size_t i = 0; i < reports.size(); ++i) {
+    EXPECT_CALL(db, DeleteReport(TestUUID(i)))
+        .WillOnce(Return(CrashReportDatabase::kNoError));
+  }
+
+  StaticCondition delete_all(true);
+  PruneCrashReportDatabase(&db, &delete_all);
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad