Add IsEmpty overload for C-style strings

Fixes #3937

PiperOrigin-RevId: 463180144
Change-Id: I21b528acc4c3f3aba4234642be01fcead7fe7f00

1 files changed, 26 insertions, 0 deletions

diff --git a/googlemock/test/gmock-matchers-comparisons_test.cc b/googlemock/test/gmock-matchers-comparisons_test.cc
index eb8f3f6..c90b0b4 100644
--- a/googlemock/test/gmock-matchers-comparisons_test.cc
+++ b/googlemock/test/gmock-matchers-comparisons_test.cc
@@ -39,6 +39,8 @@
 #pragma warning(disable : 4100)
 #endif
 
+#include <vector>
+
 #include "test/gmock-matchers_test.h"
 
 namespace testing {
@@ -983,6 +985,30 @@ TEST(ComparisonBaseTest, WorksWithMoveOnly) {
   helper.Call(MoveOnly(1));
 }
 
+TEST(IsEmptyTest, MatchesContainer) {
+  const Matcher<std::vector<int>> m = IsEmpty();
+  std::vector<int> a = {};
+  std::vector<int> b = {1};
+  EXPECT_TRUE(m.Matches(a));
+  EXPECT_FALSE(m.Matches(b));
+}
+
+TEST(IsEmptyTest, MatchesStdString) {
+  const Matcher<std::string> m = IsEmpty();
+  std::string a = "z";
+  std::string b = "";
+  EXPECT_FALSE(m.Matches(a));
+  EXPECT_TRUE(m.Matches(b));
+}
+
+TEST(IsEmptyTest, MatchesCString) {
+  const Matcher<const char*> m = IsEmpty();
+  const char a[] = "";
+  const char b[] = "x";
+  EXPECT_TRUE(m.Matches(a));
+  EXPECT_FALSE(m.Matches(b));
+}
+
 // Tests that IsNull() matches any NULL pointer of any type.
 TEST(IsNullTest, MatchesNullPointer) {
   Matcher<int*> m1 = IsNull();