Add StringRef::count({char,StringRef})


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79354 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/StringRefTest.cpp b/unittests/ADT/StringRefTest.cpp
index 972201c..ef89e9f 100644
--- a/unittests/ADT/StringRefTest.cpp
+++ b/unittests/ADT/StringRefTest.cpp
@@ -94,6 +94,13 @@
   EXPECT_TRUE(Str.find("hello") == 0);
   EXPECT_TRUE(Str.find("ello") == 1);
   EXPECT_TRUE(Str.find("zz") == StringRef::npos);
+
+  EXPECT_TRUE(Str.count('l') == 2);
+  EXPECT_TRUE(Str.count('z') == 0);
+  EXPECT_TRUE(Str.count("helloworld") == 0);
+  EXPECT_TRUE(Str.count("hello") == 1);
+  EXPECT_TRUE(Str.count("ello") == 1);
+  EXPECT_TRUE(Str.count("zz") == 0);
 }
 
 } // end anonymous namespace