base/location_unittest.cc

   1 // Copyright 2019 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/location.h"
   6
   7 #include "base/debug/debugging_buildflags.h"
   8 #include "base/trace_event/base_tracing.h"
   9 #include "testing/gmock/include/gmock/gmock.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 #if BUILDFLAG(ENABLE_BASE_TRACING)
  13 #include "third_party/perfetto/include/perfetto/test/traced_value_test_support.h"  // no-presubmit-check
  14 #endif  // BUILDFLAG(ENABLE_BASE_TRACING)
  15
  16 namespace base {
  17
  18 namespace {
  19
  20 // This is a typical use: taking Location::Current as a default parameter.
  21 // So even though this looks contrived, it confirms that such usage works as
  22 // expected.
  23 Location WhereAmI(const Location& location = Location::Current()) {
  24   return location;
  25 }
  26
  27 }  // namespace
  28
  29 TEST(LocationTest, CurrentYieldsCorrectValue) {
  30   [[maybe_unused]] int previous_line = __LINE__;
  31   Location here = WhereAmI();
  32   EXPECT_NE(here.program_counter(), WhereAmI().program_counter());
  33 #if SUPPORTS_LOCATION_BUILTINS
  34   EXPECT_THAT(here.file_name(), ::testing::EndsWith("location_unittest.cc"));
  35 #if BUILDFLAG(ENABLE_LOCATION_SOURCE)
  36   EXPECT_EQ(here.line_number(), previous_line + 1);
  37   EXPECT_STREQ("TestBody", here.function_name());
  38 #endif
  39 #elif defined(OFFICIAL_BUILD)
  40 #error Location builtins must be supported in official builds.
  41 #elif BUILDFLAG(FROM_HERE_USES_LOCATION_BUILTINS)
  42 #error FROM_HERE requires location builtins to be supported.
  43 #endif
  44 }
  45
  46 #if BUILDFLAG(ENABLE_BASE_TRACING)
  47 TEST(LocationTest, TracingSupport) {
  48   EXPECT_EQ(perfetto::TracedValueToString(
  49                 Location("func", "file", 42, WhereAmI().program_counter())),
  50             "{function_name:func,file_name:file,line_number:42}");
  51 }
  52 #endif  // BUILDFLAG(ENABLE_BASE_TRACING)
  53
  54 }  // namespace base