Make absl_testing::StatusIs() print the status code as a string

PiperOrigin-RevId: 879816561
Change-Id: If257ed800753dc049dfb73e1948ba35ee7846b5d

absl/status/internal/status_matchers.h

diff --git a/absl/status/internal/status_matchers.h b/absl/status/internal/status_matchers.h
index eb61d73..2eafd13 100644
--- a/absl/status/internal/status_matchers.h
+++ b/absl/status/internal/status_matchers.h
@@ -126,18 +126,24 @@
 class StatusCode {
  public:
   /*implicit*/ StatusCode(int code)  // NOLINT
-      : code_(static_cast<::absl::StatusCode>(code)) {}
-  /*implicit*/ StatusCode(::absl::StatusCode code) : code_(code) {}  // NOLINT
+      : code_(code) {}
+  /*implicit*/ StatusCode(::absl::StatusCode code)  // NOLINT
+      : code_(static_cast<int>(code)) {}
 
   explicit operator int() const { return static_cast<int>(code_); }
 
   friend inline void PrintTo(const StatusCode& code, std::ostream* os) {
-    // TODO(b/321095377): Change this to print the status code as a string.
-    *os << static_cast<int>(code);
+    absl::string_view text =
+        absl::StatusCodeToStringView(static_cast<absl::StatusCode>(code.code_));
+    if (!text.empty()) {
+      *os << text;
+    } else {
+      *os << code.code_;
+    }
   }
 
  private:
-  ::absl::StatusCode code_;
+  int code_;
 };
 
 // Relational operators to handle matchers like Eq, Lt, etc..

absl/status/status_matchers_test.cc

diff --git a/absl/status/status_matchers_test.cc b/absl/status/status_matchers_test.cc
index 8656b2d..54cc733 100644
--- a/absl/status/status_matchers_test.cc
+++ b/absl/status/status_matchers_test.cc
@@ -122,10 +122,9 @@
               StatusIs(absl::StatusCode::kInvalidArgument, "ungueltig"));
 
   auto m = StatusIs(absl::StatusCode::kInternal, "internal error");
-  EXPECT_THAT(
-      ::testing::DescribeMatcher<absl::Status>(m),
-      MatchesRegex(
-          "has a status code that .*, and has an error message that .*"));
+  EXPECT_THAT(::testing::DescribeMatcher<absl::Status>(m),
+              MatchesRegex("has a status code that is equal to INTERNAL, and "
+                           "has an error message that .*"));
   EXPECT_THAT(
       ::testing::DescribeMatcher<absl::Status>(m, /*negation=*/true),
       MatchesRegex(