Add a Python-like join function to merge a list of strings with a
separator between each two elements.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189846 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/StringRefTest.cpp b/unittests/ADT/StringRefTest.cpp
index fa87cd0..3cb6143 100644
--- a/unittests/ADT/StringRefTest.cpp
+++ b/unittests/ADT/StringRefTest.cpp
@@ -8,6 +8,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/raw_ostream.h"
@@ -477,6 +478,32 @@
}
}
+static const char *join_input[] = { "a", "b", "c" };
+static const char join_result1[] = "a";
+static const char join_result2[] = "a:b:c";
+static const char join_result3[] = "a::b::c";
+TEST(StringRefTest, joinStrings) {
+ std::vector<StringRef> v1;
+ std::vector<std::string> v2;
+ for (size_t i = 0; i < array_lengthof(join_input); ++i) {
+ v1.push_back(join_input[i]);
+ v2.push_back(join_input[i]);
+ }
+
+ bool v1_join1 = join(v1.begin(), v1.begin() + 1, ":") == join_result1;
+ EXPECT_TRUE(v1_join1);
+ bool v1_join2 = join(v1.begin(), v1.end(), ":") == join_result2;
+ EXPECT_TRUE(v1_join2);
+ bool v1_join3 = join(v1.begin(), v1.end(), "::") == join_result3;
+ EXPECT_TRUE(v1_join3);
+
+ bool v2_join1 = join(v2.begin(), v2.begin() + 1, ":") == join_result1;
+ EXPECT_TRUE(v2_join1);
+ bool v2_join2 = join(v2.begin(), v2.end(), ":") == join_result2;
+ EXPECT_TRUE(v2_join2);
+ bool v2_join3 = join(v2.begin(), v2.end(), "::") == join_result3;
+ EXPECT_TRUE(v2_join3);
+}
} // end anonymous namespace