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annotate unittests/ADT/TwineTest.cpp @ 3:9ad51c7bc036

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author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Wed, 15 May 2013 06:43:32 +0900
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1 //===- TwineTest.cpp - Twine unit tests -----------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/ADT/Twine.h"
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11 #include "llvm/ADT/SmallString.h"
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12 #include "llvm/Support/raw_ostream.h"
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13 #include "gtest/gtest.h"
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14 using namespace llvm;
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15
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16 namespace {
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17
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18 std::string repr(const Twine &Value) {
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19 std::string res;
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20 llvm::raw_string_ostream OS(res);
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21 Value.printRepr(OS);
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22 return OS.str();
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23 }
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24
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25 TEST(TwineTest, Construction) {
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26 EXPECT_EQ("", Twine().str());
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27 EXPECT_EQ("hi", Twine("hi").str());
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28 EXPECT_EQ("hi", Twine(std::string("hi")).str());
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29 EXPECT_EQ("hi", Twine(StringRef("hi")).str());
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30 EXPECT_EQ("hi", Twine(StringRef(std::string("hi"))).str());
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31 EXPECT_EQ("hi", Twine(StringRef("hithere", 2)).str());
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32 }
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33
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34 TEST(TwineTest, Numbers) {
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35 EXPECT_EQ("123", Twine(123U).str());
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36 EXPECT_EQ("123", Twine(123).str());
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37 EXPECT_EQ("-123", Twine(-123).str());
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38 EXPECT_EQ("123", Twine(123).str());
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39 EXPECT_EQ("-123", Twine(-123).str());
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40
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41 EXPECT_EQ("7b", Twine::utohexstr(123).str());
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42 }
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43
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44 TEST(TwineTest, Characters) {
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45 EXPECT_EQ("x", Twine('x').str());
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46 EXPECT_EQ("x", Twine(static_cast<unsigned char>('x')).str());
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47 EXPECT_EQ("x", Twine(static_cast<signed char>('x')).str());
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48 }
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49
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50 TEST(TwineTest, Concat) {
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51 // Check verse repr, since we care about the actual representation not just
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52 // the result.
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53
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54 // Concat with null.
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55 EXPECT_EQ("(Twine null empty)",
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56 repr(Twine("hi").concat(Twine::createNull())));
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57 EXPECT_EQ("(Twine null empty)",
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58 repr(Twine::createNull().concat(Twine("hi"))));
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59
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60 // Concat with empty.
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61 EXPECT_EQ("(Twine cstring:\"hi\" empty)",
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62 repr(Twine("hi").concat(Twine())));
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63 EXPECT_EQ("(Twine cstring:\"hi\" empty)",
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64 repr(Twine().concat(Twine("hi"))));
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65
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66 // Concatenation of unary ropes.
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67 EXPECT_EQ("(Twine cstring:\"a\" cstring:\"b\")",
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68 repr(Twine("a").concat(Twine("b"))));
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69
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70 // Concatenation of other ropes.
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71 EXPECT_EQ("(Twine rope:(Twine cstring:\"a\" cstring:\"b\") cstring:\"c\")",
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72 repr(Twine("a").concat(Twine("b")).concat(Twine("c"))));
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73 EXPECT_EQ("(Twine cstring:\"a\" rope:(Twine cstring:\"b\" cstring:\"c\"))",
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74 repr(Twine("a").concat(Twine("b").concat(Twine("c")))));
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75 }
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76
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77 TEST(TwineTest, toNullTerminatedStringRef) {
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78 SmallString<8> storage;
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79 EXPECT_EQ(0, *Twine("hello").toNullTerminatedStringRef(storage).end());
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80 EXPECT_EQ(0,
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81 *Twine(StringRef("hello")).toNullTerminatedStringRef(storage).end());
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82 }
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83
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84 // I suppose linking in the entire code generator to add a unit test to check
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85 // the code size of the concat operation is overkill... :)
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86
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87 } // end anonymous namespace