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, Numbers) {
34 EXPECT_EQ("123", Twine(123U).str());
35 EXPECT_EQ("123", Twine(123).str());
36 EXPECT_EQ("-123", Twine(-123).str());
37 EXPECT_EQ("123", Twine(123).str());
38 EXPECT_EQ("-123", Twine(-123).str());
39 EXPECT_EQ("123", Twine((char) 123).str());
40 EXPECT_EQ("-123", Twine((signed char) -123).str());
42 EXPECT_EQ("7B", Twine::utohexstr(123).str());
43 EXPECT_EQ("FFFFFFFFFFFFFF85", Twine::itohexstr(-123).str());
46 TEST(TwineTest, Concat) {
47 // Check verse repr, since we care about the actual representation not just
51 EXPECT_EQ("(Twine null empty)",
52 repr(Twine("hi").concat(Twine::createNull())));
53 EXPECT_EQ("(Twine null empty)",
54 repr(Twine::createNull().concat(Twine("hi"))));
57 EXPECT_EQ("(Twine cstring:\"hi\" empty)",
58 repr(Twine("hi").concat(Twine())));
59 EXPECT_EQ("(Twine cstring:\"hi\" empty)",
60 repr(Twine().concat(Twine("hi"))));
62 // Concatenation of unary ropes.
63 EXPECT_EQ("(Twine cstring:\"a\" cstring:\"b\")",
64 repr(Twine("a").concat(Twine("b"))));
66 // Concatenation of other ropes.
67 EXPECT_EQ("(Twine rope:(Twine cstring:\"a\" cstring:\"b\") cstring:\"c\")",
68 repr(Twine("a").concat(Twine("b")).concat(Twine("c"))));
69 EXPECT_EQ("(Twine cstring:\"a\" rope:(Twine cstring:\"b\" cstring:\"c\"))",
70 repr(Twine("a").concat(Twine("b").concat(Twine("c")))));
73 // I suppose linking in the entire code generator to add a unit test to check
74 // the code size of the concat operation is overkill... :)
76 } // end anonymous namespace