Add Twine ADT.
- Not currently used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76956 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/ADT/TwineTest.cpp b/unittests/ADT/TwineTest.cpp
new file mode 100644
index 0000000..50fdd2e
--- /dev/null
+++ b/unittests/ADT/TwineTest.cpp
@@ -0,0 +1,63 @@
+//===- TwineTest.cpp - Twine unit tests -----------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+namespace {
+
+std::string repr(const Twine &Value) {
+ std::string res;
+ llvm::raw_string_ostream OS(res);
+ Value.printRepr(OS);
+ return OS.str();
+}
+
+TEST(TwineTest, Construction) {
+ EXPECT_EQ("", Twine().str());
+ EXPECT_EQ("hi", Twine("hi").str());
+ EXPECT_EQ("hi", Twine(std::string("hi")).str());
+ EXPECT_EQ("hi", Twine(StringRef("hi")).str());
+ EXPECT_EQ("hi", Twine(StringRef(std::string("hi"))).str());
+ EXPECT_EQ("hi", Twine(StringRef("hithere", 2)).str());
+}
+
+TEST(TwineTest, Concat) {
+ // Check verse repr, since we care about the actual representation not just
+ // the result.
+
+ // Concat with null.
+ EXPECT_EQ("(Twine null empty)",
+ repr(Twine("hi").concat(Twine::createNull())));
+ EXPECT_EQ("(Twine null empty)",
+ repr(Twine::createNull().concat(Twine("hi"))));
+
+ // Concat with empty.
+ EXPECT_EQ("(Twine cstring:\"hi\" empty)",
+ repr(Twine("hi").concat(Twine())));
+ EXPECT_EQ("(Twine cstring:\"hi\" empty)",
+ repr(Twine().concat(Twine("hi"))));
+
+ // Concatenation of unary ropes.
+ EXPECT_EQ("(Twine cstring:\"a\" cstring:\"b\")",
+ repr(Twine("a").concat(Twine("b"))));
+
+ // Concatenation of other ropes.
+ EXPECT_EQ("(Twine rope:(Twine cstring:\"a\" cstring:\"b\") cstring:\"c\")",
+ repr(Twine("a").concat(Twine("b")).concat(Twine("c"))));
+ EXPECT_EQ("(Twine cstring:\"a\" rope:(Twine cstring:\"b\" cstring:\"c\"))",
+ repr(Twine("a").concat(Twine("b").concat(Twine("c")))));
+}
+
+ // I suppose linking in the entire code generator to add a unit test to check
+ // the code size of the concat operation is overkill... :)
+
+} // end anonymous namespace