1 //===- TwineTest.cpp - Twine unit tests -----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "gtest/gtest.h"
11 #include "llvm/ADT/Twine.h"
12 #include "llvm/Support/raw_ostream.h"
17 std::string repr(const Twine &Value) {
19 llvm::raw_string_ostream OS(res);
24 TEST(TwineTest, Construction) {
25 EXPECT_EQ("", Twine().str());
26 EXPECT_EQ("hi", Twine("hi").str());
27 EXPECT_EQ("hi", Twine(std::string("hi")).str());
28 EXPECT_EQ("hi", Twine(StringRef("hi")).str());
29 EXPECT_EQ("hi", Twine(StringRef(std::string("hi"))).str());
30 EXPECT_EQ("hi", Twine(StringRef("hithere", 2)).str());
33 TEST(TwineTest, Concat) {
34 // Check verse repr, since we care about the actual representation not just
38 EXPECT_EQ("(Twine null empty)",
39 repr(Twine("hi").concat(Twine::createNull())));
40 EXPECT_EQ("(Twine null empty)",
41 repr(Twine::createNull().concat(Twine("hi"))));
44 EXPECT_EQ("(Twine cstring:\"hi\" empty)",
45 repr(Twine("hi").concat(Twine())));
46 EXPECT_EQ("(Twine cstring:\"hi\" empty)",
47 repr(Twine().concat(Twine("hi"))));
49 // Concatenation of unary ropes.
50 EXPECT_EQ("(Twine cstring:\"a\" cstring:\"b\")",
51 repr(Twine("a").concat(Twine("b"))));
53 // Concatenation of other ropes.
54 EXPECT_EQ("(Twine rope:(Twine cstring:\"a\" cstring:\"b\") cstring:\"c\")",
55 repr(Twine("a").concat(Twine("b")).concat(Twine("c"))));
56 EXPECT_EQ("(Twine cstring:\"a\" rope:(Twine cstring:\"b\" cstring:\"c\"))",
57 repr(Twine("a").concat(Twine("b").concat(Twine("c")))));
60 // I suppose linking in the entire code generator to add a unit test to check
61 // the code size of the concat operation is overkill... :)
63 } // end anonymous namespace