1 //===- StringExtrasTest.cpp - Unit tests for String extras ----------------===//
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 "llvm/ADT/StringExtras.h"
11 #include "llvm/Support/raw_ostream.h"
12 #include "gtest/gtest.h"
13 
14 using namespace llvm;
15 
16 TEST(StringExtrasTest, Join) {
17   std::vector<std::string> Items;
18   EXPECT_EQ("", join(Items.begin(), Items.end(), " <sep> "));
19 
20   Items = {"foo"};
21   EXPECT_EQ("foo", join(Items.begin(), Items.end(), " <sep> "));
22 
23   Items = {"foo", "bar"};
24   EXPECT_EQ("foo <sep> bar", join(Items.begin(), Items.end(), " <sep> "));
25 
26   Items = {"foo", "bar", "baz"};
27   EXPECT_EQ("foo <sep> bar <sep> baz",
28             join(Items.begin(), Items.end(), " <sep> "));
29 }
30 
31 TEST(StringExtrasTest, JoinItems) {
32   const char *Foo = "foo";
33   std::string Bar = "bar";
34   llvm::StringRef Baz = "baz";
35   char X = 'x';
36 
37   EXPECT_EQ("", join_items(" <sep> "));
38   EXPECT_EQ("", join_items('/'));
39 
40   EXPECT_EQ("foo", join_items(" <sep> ", Foo));
41   EXPECT_EQ("foo", join_items('/', Foo));
42 
43   EXPECT_EQ("foo <sep> bar", join_items(" <sep> ", Foo, Bar));
44   EXPECT_EQ("foo/bar", join_items('/', Foo, Bar));
45 
46   EXPECT_EQ("foo <sep> bar <sep> baz", join_items(" <sep> ", Foo, Bar, Baz));
47   EXPECT_EQ("foo/bar/baz", join_items('/', Foo, Bar, Baz));
48 
49   EXPECT_EQ("foo <sep> bar <sep> baz <sep> x",
50             join_items(" <sep> ", Foo, Bar, Baz, X));
51 
52   EXPECT_EQ("foo/bar/baz/x", join_items('/', Foo, Bar, Baz, X));
53 }
54 
55 TEST(StringExtrasTest, ToAndFromHex) {
56   std::vector<uint8_t> OddBytes = {0x5, 0xBD, 0x0D, 0x3E, 0xCD};
57   std::string OddStr = "05BD0D3ECD";
58   StringRef OddData(reinterpret_cast<const char *>(OddBytes.data()),
59                     OddBytes.size());
60   EXPECT_EQ(OddStr, toHex(OddData));
61   EXPECT_EQ(OddData, fromHex(StringRef(OddStr).drop_front()));
62 
63   std::vector<uint8_t> EvenBytes = {0xA5, 0xBD, 0x0D, 0x3E, 0xCD};
64   std::string EvenStr = "A5BD0D3ECD";
65   StringRef EvenData(reinterpret_cast<const char *>(EvenBytes.data()),
66                      EvenBytes.size());
67   EXPECT_EQ(EvenStr, toHex(EvenData));
68   EXPECT_EQ(EvenData, fromHex(EvenStr));
69 }
70 
71 TEST(StringExtrasTest, to_float) {
72   float F;
73   EXPECT_TRUE(to_float("4.7", F));
74   EXPECT_FLOAT_EQ(4.7f, F);
75 
76   double D;
77   EXPECT_TRUE(to_float("4.7", D));
78   EXPECT_DOUBLE_EQ(4.7, D);
79 
80   long double LD;
81   EXPECT_TRUE(to_float("4.7", LD));
82   EXPECT_DOUBLE_EQ(4.7, LD);
83 
84   EXPECT_FALSE(to_float("foo", F));
85   EXPECT_FALSE(to_float("7.4 foo", F));
86   EXPECT_FLOAT_EQ(4.7f, F); // F should be unchanged
87 }
88 
89 TEST(StringExtrasTest, printLowerCase) {
90   std::string str;
91   raw_string_ostream OS(str);
92   printLowerCase("ABCdefg01234.,&!~`'}\"", OS);
93   EXPECT_EQ("abcdefg01234.,&!~`'}\"", OS.str());
94 }
95