1 //===- TwineTest.cpp - Twine unit tests -----------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "gtest/gtest.h" 11 #include "llvm/ADT/Twine.h" 12 #include "llvm/ADT/SmallString.h" 13 #include "llvm/Support/raw_ostream.h" 14 using namespace llvm; 15 16 namespace { 17 18 std::string repr(const Twine &Value) { 19 std::string res; 20 llvm::raw_string_ostream OS(res); 21 Value.printRepr(OS); 22 return OS.str(); 23 } 24 25 TEST(TwineTest, Construction) { 26 EXPECT_EQ("", Twine().str()); 27 EXPECT_EQ("hi", Twine("hi").str()); 28 EXPECT_EQ("hi", Twine(std::string("hi")).str()); 29 EXPECT_EQ("hi", Twine(StringRef("hi")).str()); 30 EXPECT_EQ("hi", Twine(StringRef(std::string("hi"))).str()); 31 EXPECT_EQ("hi", Twine(StringRef("hithere", 2)).str()); 32 } 33 34 TEST(TwineTest, Numbers) { 35 EXPECT_EQ("123", Twine(123U).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(-123).str()); 40 41 EXPECT_EQ("7b", Twine::utohexstr(123).str()); 42 } 43 44 TEST(TwineTest, Characters) { 45 EXPECT_EQ("x", Twine('x').str()); 46 EXPECT_EQ("x", Twine(static_cast<unsigned char>('x')).str()); 47 EXPECT_EQ("x", Twine(static_cast<signed char>('x')).str()); 48 } 49 50 TEST(TwineTest, Concat) { 51 // Check verse repr, since we care about the actual representation not just 52 // the result. 53 54 // Concat with null. 55 EXPECT_EQ("(Twine null empty)", 56 repr(Twine("hi").concat(Twine::createNull()))); 57 EXPECT_EQ("(Twine null empty)", 58 repr(Twine::createNull().concat(Twine("hi")))); 59 60 // Concat with empty. 61 EXPECT_EQ("(Twine cstring:\"hi\" empty)", 62 repr(Twine("hi").concat(Twine()))); 63 EXPECT_EQ("(Twine cstring:\"hi\" empty)", 64 repr(Twine().concat(Twine("hi")))); 65 66 // Concatenation of unary ropes. 67 EXPECT_EQ("(Twine cstring:\"a\" cstring:\"b\")", 68 repr(Twine("a").concat(Twine("b")))); 69 70 // Concatenation of other ropes. 71 EXPECT_EQ("(Twine rope:(Twine cstring:\"a\" cstring:\"b\") cstring:\"c\")", 72 repr(Twine("a").concat(Twine("b")).concat(Twine("c")))); 73 EXPECT_EQ("(Twine cstring:\"a\" rope:(Twine cstring:\"b\" cstring:\"c\"))", 74 repr(Twine("a").concat(Twine("b").concat(Twine("c"))))); 75 } 76 77 TEST(TwineTest, toNullTerminatedStringRef) { 78 SmallString<8> storage; 79 EXPECT_EQ(0, *Twine("hello").toNullTerminatedStringRef(storage).end()); 80 EXPECT_EQ(0, 81 *Twine(StringRef("hello")).toNullTerminatedStringRef(storage).end()); 82 } 83 84 // I suppose linking in the entire code generator to add a unit test to check 85 // the code size of the concat operation is overkill... :) 86 87 } // end anonymous namespace 88
