Export of internal Abseil changes

--
6457ad659de86ce4cae1e9f7cb03a701c6c2851e by Abseil Team <absl-team@google.com>:

Introduced ErrnoToStatusCode and ErrnoToStatus to abseil.

PiperOrigin-RevId: 442903450
Change-Id: I9c062b34a3811216f43eef56e631eada3b4e3e84
GitOrigin-RevId: 6457ad659de86ce4cae1e9f7cb03a701c6c2851e

1 files changed, 20 insertions, 0 deletions

diff --git a/absl/status/status_test.cc b/absl/status/status_test.cc
index 1b038f6d..89cce7df 100644
--- a/absl/status/status_test.cc
+++ b/absl/status/status_test.cc
@@ -14,6 +14,8 @@
 
 #include "absl/status/status.h"
 
+#include <errno.h>
+
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/strings/str_cat.h"
@@ -485,4 +487,22 @@ TEST(Status, Swap) {
   test_swap(no_payload, with_payload);
   test_swap(with_payload, no_payload);
 }
+
+TEST(StatusErrno, ErrnoToStatusCode) {
+  EXPECT_EQ(absl::ErrnoToStatusCode(0), absl::StatusCode::kOk);
+
+  // Spot-check a few errno values.
+  EXPECT_EQ(absl::ErrnoToStatusCode(EINVAL),
+            absl::StatusCode::kInvalidArgument);
+  EXPECT_EQ(absl::ErrnoToStatusCode(ENOENT), absl::StatusCode::kNotFound);
+
+  // We'll pick a very large number so it hopefully doesn't collide to errno.
+  EXPECT_EQ(absl::ErrnoToStatusCode(19980927), absl::StatusCode::kUnknown);
+}
+
+TEST(StatusErrno, ErrnoToStatus) {
+  absl::Status status = absl::ErrnoToStatus(ENOENT, "Cannot open 'path'");
+  EXPECT_EQ(status.code(), absl::StatusCode::kNotFound);
+  EXPECT_EQ(status.message(), "Cannot open 'path': No such file or directory");
+}
 }  // namespace