1 //===- llvm/unittest/StringViewTest.cpp - StringView unit tests -----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/Demangle/StringView.h"
10 #include "gtest/gtest.h"
11
12 using namespace llvm;
13 using llvm::itanium_demangle::StringView;
14
15 namespace llvm {
16 namespace itanium_demangle {
17
operator <<(std::ostream & OS,const StringView & S)18 std::ostream &operator<<(std::ostream &OS, const StringView &S) {
19 return OS.write(S.begin(), S.size());
20 }
21
22 } // namespace itanium_demangle
23 } // namespace llvm
24
TEST(StringViewTest,EmptyInitializerList)25 TEST(StringViewTest, EmptyInitializerList) {
26 StringView S = {};
27 EXPECT_TRUE(S.empty());
28
29 S = {};
30 EXPECT_TRUE(S.empty());
31 }
32
TEST(StringViewTest,Substr)33 TEST(StringViewTest, Substr) {
34 StringView S("abcdef");
35
36 EXPECT_EQ("abcdef", S.substr(0));
37 EXPECT_EQ("f", S.substr(5));
38 EXPECT_EQ("", S.substr(6));
39
40 EXPECT_EQ("", S.substr(0, 0));
41 EXPECT_EQ("a", S.substr(0, 1));
42 EXPECT_EQ("abcde", S.substr(0, 5));
43 EXPECT_EQ("abcdef", S.substr(0, 6));
44 EXPECT_EQ("abcdef", S.substr(0, 7));
45
46 EXPECT_EQ("f", S.substr(5, 100));
47 EXPECT_EQ("", S.substr(6, 100));
48 }
49