unittests/ADT/StringRefTest.cpp

   1 //===- llvm/unittest/ADT/StringRefTest.cpp - StringRef 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/StringRef.h"
  12 using namespace llvm;
  13
  14 namespace {
  15
  16 TEST(StringRefTest, Construction) {
  17   EXPECT_TRUE(StringRef() == "");
  18   EXPECT_TRUE(StringRef("hello") == "hello");
  19   EXPECT_TRUE(StringRef("hello world", 5) == "hello");
  20   EXPECT_TRUE(StringRef(std::string("hello")) == "hello");
  21 }
  22
  23 TEST(StringRefTest, Iteration) {
  24   StringRef S("hello");
  25   const char *p = "hello";
  26   for (const char *it = S.begin(), *ie = S.end(); it != ie; ++it, ++p)
  27     EXPECT_TRUE(*p == *it);
  28 }
  29
  30 TEST(StringRefTest, StringOps) {
  31   const char *p = "hello";
  32   EXPECT_EQ(p, StringRef(p, 0).data());
  33   EXPECT_TRUE(StringRef().empty());
  34   EXPECT_EQ((size_t) 5, StringRef("hello").size());
  35   EXPECT_EQ(-1, StringRef("aab").compare("aad"));
  36   EXPECT_EQ( 0, StringRef("aab").compare("aab"));
  37   EXPECT_EQ( 1, StringRef("aab").compare("aaa"));
  38   EXPECT_EQ(-1, StringRef("aab").compare("aabb"));
  39   EXPECT_EQ( 1, StringRef("aab").compare("aa"));
  40 }
  41
  42 TEST(StringRefTest, Operators) {
  43   EXPECT_TRUE(StringRef() == "");
  44   EXPECT_TRUE(StringRef("aab") < StringRef("aad"));
  45   EXPECT_FALSE(StringRef("aab") < StringRef("aab"));
  46   EXPECT_TRUE(StringRef("aab") <= StringRef("aab"));
  47   EXPECT_FALSE(StringRef("aab") <= StringRef("aaa"));
  48   EXPECT_TRUE(StringRef("aad") > StringRef("aab"));
  49   EXPECT_FALSE(StringRef("aab") > StringRef("aab"));
  50   EXPECT_TRUE(StringRef("aab") >= StringRef("aab"));
  51   EXPECT_FALSE(StringRef("aaa") >= StringRef("aab"));
  52   EXPECT_TRUE(StringRef("aab") == StringRef("aab"));
  53   EXPECT_FALSE(StringRef("aab") == StringRef("aac"));
  54   EXPECT_FALSE(StringRef("aab") != StringRef("aab"));
  55   EXPECT_TRUE(StringRef("aab") != StringRef("aac"));
  56   EXPECT_EQ('a', StringRef("aab")[1]);
  57 }
  58
  59 TEST(StringRefTest, Utilities) {
  60   StringRef Str("hello");
  61   EXPECT_TRUE(Str.substr(3) == "lo");
  62   EXPECT_TRUE(Str.substr(100) == "");
  63   EXPECT_TRUE(Str.substr(0, 100) == "hello");
  64   EXPECT_TRUE(Str.substr(4, 10) == "o");
  65
  66   EXPECT_TRUE(Str.startswith("he"));
  67   EXPECT_FALSE(Str.startswith("helloworld"));
  68   EXPECT_FALSE(Str.startswith("hi"));
  69 }
  70
  71 } // end anonymous namespace