Quelle TestLogging.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/Logging.h"
#include "mozilla/Sprintf.h"
#include "gtest/gtest.h"

namespace mozilla::detail {
bool LimitFileToLessThanSize(const char* aFilename, uint32_t aSize,
                             uint16_t aLongLineSize);
}

// These format strings result in 1024 byte lines on disk regardless
// of OS, which makes various file sizes OS-agnostic.
#ifdef XP_WIN
#  define WHOLE_LINE "%01022d\n"
#  define SHORT_LINE "%0510d\n"
#else
#  define WHOLE_LINE "%01023d\n"
#  define SHORT_LINE "%0511d\n"
#endif

// Write the given number of 1k lines to the given file name.
void WriteTestLogFile(const char* name, uint32_t numLines) {
  FILE* f = fopen(name, "w");
  ASSERT_NE(f, (FILE*)nullptr);

  for (uint32_t i = 0; i < numLines; i++) {
    char buf[1024 + 1];
    SprintfLiteral(buf, WHOLE_LINE, i);
    EXPECT_TRUE(fputs(buf, f) >= 0);
  }

  uint64_t size = static_cast<uint64_t>(ftell(f));

  // Close before asserting.
  EXPECT_FALSE(fclose(f));

  ASSERT_EQ(numLines * 1024, size);
}

// Assert that the given file name has the expected size and that its
// first line is the expected line.
void AssertSizeAndFirstLine(const char* name, uint32_t expectedSize,
                            const char* expectedLine) {
  FILE* f = fopen(name, "r");
  ASSERT_NE(f, (FILE*)nullptr);

  EXPECT_FALSE(fseek(f, 0, SEEK_END));
  uint64_t size = static_cast<uint64_t>(ftell(f));

  EXPECT_FALSE(fseek(f, 0, SEEK_SET));

  char line[1024 + 1];
  const char* result = fgets(line, sizeof(line), f);

  // Close before asserting.
  EXPECT_FALSE(fclose(f));

  ASSERT_NE(result, nullptr);
  ASSERT_EQ(expectedSize, size);
  ASSERT_STREQ(expectedLine, line);
}

TEST(Logging, DoesNothingWhenNotNeededExact)
{
  char nameBuf[2048];
  SprintfLiteral(
      nameBuf, "%s_%s.moz_log",
      testing::UnitTest::GetInstance()->current_test_info()->test_case_name(),
      testing::UnitTest::GetInstance()->current_test_info()->name());

  WriteTestLogFile(nameBuf, 256);

  // Here the log file is exactly the allowed size.  It shouldn't be limited.
  ASSERT_TRUE(
      mozilla::detail::LimitFileToLessThanSize(nameBuf, 256 * 1024, 1024));

  char expectedLine[1024 + 1];
  SprintfLiteral(expectedLine, WHOLE_LINE, 0);

  AssertSizeAndFirstLine(nameBuf, 256 * 1024, expectedLine);

  EXPECT_FALSE(remove(nameBuf));
}

TEST(Logging, DoesNothingWhenNotNeededInexact)
{
  char nameBuf[2048];
  SprintfLiteral(
      nameBuf, "%s_%s.moz_log",
      testing::UnitTest::GetInstance()->current_test_info()->test_case_name(),
      testing::UnitTest::GetInstance()->current_test_info()->name());

  WriteTestLogFile(nameBuf, 200);

  // Here the log file is strictly less than the allowed size.  It shouldn't be
  // limited.
  ASSERT_TRUE(
      mozilla::detail::LimitFileToLessThanSize(nameBuf, 256 * 1024, 1024));

  char expectedLine[1024 + 1];
  SprintfLiteral(expectedLine, WHOLE_LINE, 0);

  AssertSizeAndFirstLine(nameBuf, 200 * 1024, expectedLine);

  EXPECT_FALSE(remove(nameBuf));
}

TEST(Logging, LimitsToLessThanSize)
{
  char nameBuf[2048];
  SprintfLiteral(
      nameBuf, "%s_%s.moz_log",
      testing::UnitTest::GetInstance()->current_test_info()->test_case_name(),
      testing::UnitTest::GetInstance()->current_test_info()->name());

  WriteTestLogFile(nameBuf, 300);

  ASSERT_TRUE(
      mozilla::detail::LimitFileToLessThanSize(nameBuf, 256 * 1024, 1024));

  char expectedLine[1024 + 1];
  SprintfLiteral(expectedLine, WHOLE_LINE, 300 - 256);

  AssertSizeAndFirstLine(nameBuf, 256 * 1024, expectedLine);

  EXPECT_FALSE(remove(nameBuf));
}

TEST(Logging, MayCutLongLinesExact)
{
  char nameBuf[2048];
  SprintfLiteral(
      nameBuf, "%s_%s.moz_log",
      testing::UnitTest::GetInstance()->current_test_info()->test_case_name(),
      testing::UnitTest::GetInstance()->current_test_info()->name());

  WriteTestLogFile(nameBuf, 300);

  char expectedLine[1024 + 1];

  ASSERT_TRUE(mozilla::detail::LimitFileToLessThanSize(
      nameBuf, (256 * 1024) - 512, 512));

  SprintfLiteral(expectedLine, SHORT_LINE, 300 - 256);

  // The line to be cut ends "...044\n."  We read 512 bytes (the
  // buffer size), so we're left with 512 bytes, one of which is the
  // newline.
  AssertSizeAndFirstLine(nameBuf, 256 * 1024 - 512, expectedLine);

  EXPECT_FALSE(remove(nameBuf));
}

TEST(Logging, MayCutLongLinesInexact)
{
  char nameBuf[2048];
  SprintfLiteral(
      nameBuf, "%s_%s.moz_log",
      testing::UnitTest::GetInstance()->current_test_info()->test_case_name(),
      testing::UnitTest::GetInstance()->current_test_info()->name());

  WriteTestLogFile(nameBuf, 300);

  char expectedLine[1024 + 1];

  ASSERT_TRUE(mozilla::detail::LimitFileToLessThanSize(
      nameBuf, (256 * 1024) - 512, 512));

  SprintfLiteral(expectedLine, SHORT_LINE, 300 - 256);

  // We read 512 bytes (the buffer size), so we're left with 512
  // bytes, one of which is the newline.  Notice that the limited size
  // is smaller than the requested size.
  AssertSizeAndFirstLine(nameBuf, 256 * 1024 - 512, expectedLine);

  EXPECT_FALSE(remove(nameBuf));
}

quality87%

¤ Dauer der Verarbeitung: 0.5 Sekunden ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.