Fix gmock_output_test when using MSVC

std::pair is printed as "struct std::pair<int,bool>" when using MSVC
vs "std::pair<int,bool>" with other compilers. Switch to "std::tuple", which
is the same for all compilers.

See
https://learn.microsoft.com/en-us/cpp/standard-library/pair-structure
https://learn.microsoft.com/en-us/cpp/standard-library/tuple-class

PiperOrigin-RevId: 506340295
Change-Id: Ib4ce2f74d54888a4e4173f42da1b55cc5583f7d4

Author: thughes

googlemock/test/gmock_output_test_.cc

@@ -33,6 +33,7 @@
 #include <stdio.h>
 
 #include <string>
+#include <tuple>
 
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
@@ -254,12 +255,16 @@ TEST_F(GMockOutputTest, CatchesLeakedMocks) {
 }
 
 MATCHER_P2(IsPair, first, second, "") {
-  return Value(arg.first, first) && Value(arg.second, second);
+  return Value(std::get<0>(arg), first) && Value(std::get<1>(arg), second);
 }
 
 TEST_F(GMockOutputTest, PrintsMatcher) {
   const testing::Matcher<int> m1 = Ge(48);
-  EXPECT_THAT((std::pair<int, bool>(42, true)), IsPair(m1, true));
+  // Explicitly using std::tuple instead of std::pair due to differences between
+  // MSVC and other compilers. std::pair is printed as
+  // "struct std::pair<int,bool>" when using MSVC vs "std::pair<int,bool>" with
+  // other compilers.
+  EXPECT_THAT((std::tuple<int, bool>(42, true)), IsPair(m1, true));
 }
 
 void TestCatchesLeakedMocksInAdHocTests() {

googlemock/test/gmock_output_test_golden.txt

@@ -290,9 +290,9 @@ Stack trace:
 [       OK ] GMockOutputTest.CatchesLeakedMocks
 [ RUN      ] GMockOutputTest.PrintsMatcher
 FILE:#: Failure
-Value of: (std::pair<int, bool>(42, true))
+Value of: (std::tuple<int, bool>(42, true))
 Expected: is pair (first: is >= 48, second: true)
-  Actual: (42, true) (of type std::pair<int, bool>)
+  Actual: (42, true)
 [  FAILED  ] GMockOutputTest.PrintsMatcher
 [  FAILED  ] GMockOutputTest.UnexpectedCall
 [  FAILED  ] GMockOutputTest.UnexpectedCallToVoidFunction