diff options
author | 2021-09-01 13:48:23 -0700 | |
---|---|---|
committer | 2021-09-01 21:37:10 +0000 | |
commit | 4bb9e39c88854dbf466688177257d11810719853 (patch) | |
tree | 1f1630117478fc361c3fd4de49bf4c5d84fbb54f /absl/strings/cord_test.cc | |
parent | 665ac5b425cea2462bf85dcbb56dd68ec19ad00f (diff) |
Export of internal Abseil changes
--
f73e17cb24f7878933fc100bd9bfc39fce190b64 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 394306402
--
3d3eeffa4e37f63aa50fec1b90858043b40fe377 by Abseil Team <absl-team@google.com>:
Release a few more absl::Cord unit tests that were accidentally omitted from the OSS release before.
PiperOrigin-RevId: 394016464
--
8a77a8eb93d021aadd8fdf43e219bf35328001ad by CJ Johnson <johnsoncj@google.com>:
Fix typo in identifier
PiperOrigin-RevId: 394000560
--
d87206c7c8e045b03d74b91e47ef3db0eb47a17b by Derek Mauro <dmauro@google.com>:
Fix typo: RandenHwAes
PiperOrigin-RevId: 393879427
--
980a3402eea77b0c77fb20dd124203002ff791ba by Derek Mauro <dmauro@google.com>:
Adds macros `ABSL_LTS_RELEASE_VERSION` and `ABSL_LTS_RELEASE_PATCH_LEVEL`
to allow projects to detect if an LTS version is being used.
Fixes #1006
PiperOrigin-RevId: 393807178
--
aecc7ed34de718c64733dab76621eacb5af9af5f by CJ Johnson <johnsoncj@google.com>:
Change `alloc` to `allocator` to match the fact that other identifiers are full words
PiperOrigin-RevId: 393794869
--
ad754bbcf7b78f5d51ed5f39193ac3159429b2b4 by Derek Mauro <dmauro@google.com>:
Remove self-include of cord_rep_btree.h
PiperOrigin-RevId: 393792085
--
f8e937a0d8fe26400560754f3596e3c21bb6d0d7 by Abseil Team <absl-team@google.com>:
Fix trivial typo in comment.
PiperOrigin-RevId: 393770527
--
7a58ca5d708038d222c6a2b6ff5076b4ceffd370 by Tomas Dzetkulic <dzetkulic@google.com>:
Update Cord::AppendArray resize policy.
PiperOrigin-RevId: 393362184
--
316050d171190d9d6312cadf88b1cc2db2d1caa7 by Abseil Team <absl-team@google.com>:
Add a new top level profiling/ directory to the Abseil library
PiperOrigin-RevId: 393358109
--
0dbb8e10f7fa4a7ac74e12b178e936a67b266c51 by CJ Johnson <johnsoncj@google.com>:
Switch to the more common enable_if pattern of ` = 0` in InlinedVector
PiperOrigin-RevId: 393301549
--
136d3068ce33b50ac820e8bd01395a7164d5181f by Abseil Team <absl-team@google.com>:
Clean up typedefs in internal/inlined_vector.h
PiperOrigin-RevId: 393181754
GitOrigin-RevId: f73e17cb24f7878933fc100bd9bfc39fce190b64
Change-Id: I0c4cd4d71d97bd1bf651701b6302ea3d9ac59b66
Diffstat (limited to 'absl/strings/cord_test.cc')
-rw-r--r-- | absl/strings/cord_test.cc | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/absl/strings/cord_test.cc b/absl/strings/cord_test.cc index d0296338..06a7bd6c 100644 --- a/absl/strings/cord_test.cc +++ b/absl/strings/cord_test.cc @@ -1385,6 +1385,59 @@ TEST_P(CordTest, DiabolicalGrowth) { cord.EstimatedMemoryUsage()); } +// The following tests check support for >4GB cords in 64-bit binaries, and +// 2GB-4GB cords in 32-bit binaries. This function returns the large cord size +// that's appropriate for the binary. + +// Construct a huge cord with the specified valid prefix. +static absl::Cord MakeHuge(absl::string_view prefix) { + absl::Cord cord; + if (sizeof(size_t) > 4) { + // In 64-bit binaries, test 64-bit Cord support. + const size_t size = + static_cast<size_t>(std::numeric_limits<uint32_t>::max()) + 314; + cord.Append(absl::MakeCordFromExternal( + absl::string_view(prefix.data(), size), + [](absl::string_view s) { DoNothing(s, nullptr); })); + } else { + // Cords are limited to 32-bit lengths in 32-bit binaries. The following + // tests check for use of "signed int" to represent Cord length/offset. + // However absl::string_view does not allow lengths >= (1u<<31), so we need + // to append in two parts; + const size_t s1 = (1u << 31) - 1; + // For shorter cord, `Append` copies the data rather than allocating a new + // node. The threshold is currently set to 511, so `s2` needs to be bigger + // to not trigger the copy. + const size_t s2 = 600; + cord.Append(absl::MakeCordFromExternal( + absl::string_view(prefix.data(), s1), + [](absl::string_view s) { DoNothing(s, nullptr); })); + cord.Append(absl::MakeCordFromExternal( + absl::string_view("", s2), + [](absl::string_view s) { DoNothing(s, nullptr); })); + } + return cord; +} + +TEST_P(CordTest, HugeCord) { + absl::Cord cord = MakeHuge("huge cord"); + EXPECT_LE(cord.size(), cord.EstimatedMemoryUsage()); + EXPECT_GE(cord.size() + 100, cord.EstimatedMemoryUsage()); +} + +// Tests that Append() works ok when handed a self reference +TEST_P(CordTest, AppendSelf) { + // We run the test until data is ~16K + // This guarantees it covers small, medium and large data. + std::string control_data = "Abc"; + absl::Cord data(control_data); + while (control_data.length() < 0x4000) { + data.Append(data); + control_data.append(control_data); + ASSERT_EQ(control_data, data); + } +} + TEST_P(CordTest, MakeFragmentedCordFromInitializerList) { absl::Cord fragmented = absl::MakeFragmentedCord({"A ", "fragmented ", "Cord"}); |