o3tl/qa/test-string_view.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include <sal/config.h>
  11
  12 #include <stdexcept>
  13
  14 #include <cppunit/TestAssert.h>
  15 #include <cppunit/TestFixture.h>
  16 #include <cppunit/extensions/HelperMacros.h>
  17
  18 #include <o3tl/string_view.hxx>
  19
  20 namespace {
  21
  22 class Test: public CppUnit::TestFixture {
  23 private:
  24     CPPUNIT_TEST_SUITE(Test);
  25     CPPUNIT_TEST(testCharLiteral);
  26     CPPUNIT_TEST(testChar16Literal);
  27     CPPUNIT_TEST(testChar32Literal);
  28     CPPUNIT_TEST(testWcharLiteral);
  29     CPPUNIT_TEST(testOperations);
  30     CPPUNIT_TEST_SUITE_END();
  31
  32     void testCharLiteral() {
  33         char * const s1 = const_cast<char *>("foo");
  34         o3tl::string_view v1(s1);
  35         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v1.size());
  36         char const * const s2 = "foo";
  37         o3tl::string_view v2(s2);
  38         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v2.size());
  39         char s3[] = "foo";
  40         o3tl::string_view v3(s3);
  41         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v3.size());
  42         o3tl::string_view v4("foo");
  43         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v4.size());
  44     }
  45
  46     void testChar16Literal() {
  47         char16_t * const s1 = const_cast<char16_t *>(u"foo");
  48         o3tl::u16string_view v1(s1);
  49         CPPUNIT_ASSERT_EQUAL(o3tl::u16string_view::size_type(3), v1.size());
  50         char16_t const * const s2 = u"foo";
  51         o3tl::u16string_view v2(s2);
  52         CPPUNIT_ASSERT_EQUAL(o3tl::u16string_view::size_type(3), v2.size());
  53         char16_t s3[] = u"foo";
  54         o3tl::u16string_view v3(s3);
  55         CPPUNIT_ASSERT_EQUAL(o3tl::u16string_view::size_type(3), v3.size());
  56         o3tl::u16string_view v4(u"foo");
  57         CPPUNIT_ASSERT_EQUAL(o3tl::u16string_view::size_type(3), v4.size());
  58     }
  59
  60     void testChar32Literal() {
  61         char32_t * const s1 = const_cast<char32_t *>(U"foo");
  62         o3tl::u32string_view v1(s1);
  63         CPPUNIT_ASSERT_EQUAL(o3tl::u32string_view::size_type(3), v1.size());
  64         char32_t const * const s2 = U"foo";
  65         o3tl::u32string_view v2(s2);
  66         CPPUNIT_ASSERT_EQUAL(o3tl::u32string_view::size_type(3), v2.size());
  67         char32_t s3[] = U"foo";
  68         o3tl::u32string_view v3(s3);
  69         CPPUNIT_ASSERT_EQUAL(o3tl::u32string_view::size_type(3), v3.size());
  70         o3tl::u32string_view v4(U"foo");
  71         CPPUNIT_ASSERT_EQUAL(o3tl::u32string_view::size_type(3), v4.size());
  72     }
  73
  74     void testWcharLiteral() {
  75         wchar_t * const s1 = const_cast<wchar_t *>(L"foo");
  76         o3tl::wstring_view v1(s1);
  77         CPPUNIT_ASSERT_EQUAL(o3tl::wstring_view::size_type(3), v1.size());
  78         wchar_t const * const s2 = L"foo";
  79         o3tl::wstring_view v2(s2);
  80         CPPUNIT_ASSERT_EQUAL(o3tl::wstring_view::size_type(3), v2.size());
  81         wchar_t s3[] = L"foo";
  82         o3tl::wstring_view v3(s3);
  83         CPPUNIT_ASSERT_EQUAL(o3tl::wstring_view::size_type(3), v3.size());
  84         o3tl::wstring_view v4(L"foo");
  85         CPPUNIT_ASSERT_EQUAL(o3tl::wstring_view::size_type(3), v4.size());
  86     }
  87
  88     void testOperations() {
  89         o3tl::string_view const v("fox");
  90         auto npos = o3tl::string_view::npos;
  91             // o3tl::basic_string_view::npos will be (implicitly) inline with
  92             // C++17, but for now can't be passed as 'const T& expected'
  93             // argument into CppUnit::assertEquals, so take this detour
  94         CPPUNIT_ASSERT_EQUAL('f', *v.begin());
  95         CPPUNIT_ASSERT_EQUAL(
  96             o3tl::string_view::difference_type(3), v.end() - v.begin());
  97         CPPUNIT_ASSERT_EQUAL('f', *v.cbegin());
  98         CPPUNIT_ASSERT_EQUAL(
  99             o3tl::string_view::difference_type(3), v.cend() - v.cbegin());
 100         CPPUNIT_ASSERT_EQUAL('x', *v.rbegin());
 101         CPPUNIT_ASSERT_EQUAL(
 102             o3tl::string_view::difference_type(3), v.rend() - v.rbegin());
 103         CPPUNIT_ASSERT_EQUAL('x', *v.crbegin());
 104         CPPUNIT_ASSERT_EQUAL(
 105             o3tl::string_view::difference_type(3), v.crend() - v.crbegin());
 106         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v.size());
 107         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v.length());
 108         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::npos - 1, v.max_size());
 109         CPPUNIT_ASSERT(!v.empty());
 110         CPPUNIT_ASSERT_EQUAL('o', v[1]);
 111         try {
 112             v.at(o3tl::string_view::npos);
 113             CPPUNIT_FAIL("missing exception");
 114         } catch (std::out_of_range &) {}
 115         CPPUNIT_ASSERT_EQUAL('f', v.at(0));
 116         CPPUNIT_ASSERT_EQUAL('x', v.at(2));
 117         try {
 118             v.at(3);
 119             CPPUNIT_FAIL("missing exception");
 120         } catch (std::out_of_range &) {}
 121         CPPUNIT_ASSERT_EQUAL('f', v.front());
 122         CPPUNIT_ASSERT_EQUAL('x', v.back());
 123         CPPUNIT_ASSERT_EQUAL('f', *v.data());
 124         {
 125             o3tl::string_view v1("fox");
 126             v1.remove_prefix(2);
 127             CPPUNIT_ASSERT_EQUAL('x', v1.front());
 128             CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(1), v1.size());
 129         }
 130         {
 131             o3tl::string_view v1("fox");
 132             v1.remove_suffix(2);
 133             CPPUNIT_ASSERT_EQUAL('f', v1.front());
 134             CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(1), v1.size());
 135         }
 136         {
 137             o3tl::string_view v1("fox");
 138             o3tl::string_view v2("giraffe");
 139             v1.swap(v2);
 140             CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(7), v1.size());
 141             CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(3), v2.size());
 142         }
 143         {
 144             char a[2];
 145             auto n = v.copy(a, 10, 1);
 146             CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(2), n);
 147             CPPUNIT_ASSERT_EQUAL('o', a[0]);
 148             CPPUNIT_ASSERT_EQUAL('x', a[1]);
 149         }
 150         {
 151             auto v1 = v.substr(1);
 152             CPPUNIT_ASSERT_EQUAL('o', v1.front());
 153             CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(2), v1.size());
 154         }
 155         CPPUNIT_ASSERT(v.compare(o3tl::string_view("foo")) > 0);
 156         CPPUNIT_ASSERT(v.compare(0, 2, o3tl::string_view("foo")) < 0);
 157         CPPUNIT_ASSERT_EQUAL(
 158             0, v.compare(0, 2, o3tl::string_view("foo"), 0, 2));
 159         CPPUNIT_ASSERT_EQUAL(0, v.compare("fox"));
 160         CPPUNIT_ASSERT(v.compare(1, 2, "abc") > 0);
 161         CPPUNIT_ASSERT_EQUAL(0, v.compare(1, 2, "oxx", 2));
 162         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(1), v.find("ox"));
 163         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(1), v.find('o'));
 164         CPPUNIT_ASSERT_EQUAL(
 165             o3tl::string_view::size_type(1), v.find("oxx", 0, 2));
 166         CPPUNIT_ASSERT_EQUAL(npos, v.find("oxx"));
 167         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(1), v.rfind("ox"));
 168         CPPUNIT_ASSERT_EQUAL(o3tl::string_view::size_type(1), v.rfind('o'));
 169         CPPUNIT_ASSERT_EQUAL(
 170             o3tl::string_view::size_type(1),
 171             v.rfind("oxx", o3tl::string_view::npos, 2));
 172         CPPUNIT_ASSERT_EQUAL(npos, v.rfind("oxx"));
 173         CPPUNIT_ASSERT_EQUAL(
 174             o3tl::string_view::size_type(1), v.find_first_of("nop"));
 175         CPPUNIT_ASSERT_EQUAL(
 176             o3tl::string_view::size_type(1), v.find_first_of('o'));
 177         CPPUNIT_ASSERT_EQUAL(
 178             o3tl::string_view::size_type(1), v.find_first_of("nofx", 0, 2));
 179         CPPUNIT_ASSERT_EQUAL(
 180             o3tl::string_view::size_type(0), v.find_first_of("nofx"));
 181         CPPUNIT_ASSERT_EQUAL(
 182             o3tl::string_view::size_type(1), v.find_last_of("nop"));
 183         CPPUNIT_ASSERT_EQUAL(
 184             o3tl::string_view::size_type(1), v.find_last_of('o'));
 185         CPPUNIT_ASSERT_EQUAL(
 186             o3tl::string_view::size_type(1),
 187             v.find_last_of("nofx", o3tl::string_view::npos, 2));
 188         CPPUNIT_ASSERT_EQUAL(
 189             o3tl::string_view::size_type(2), v.find_last_of("nofx"));
 190         CPPUNIT_ASSERT_EQUAL(
 191             o3tl::string_view::size_type(1), v.find_first_not_of("fx"));
 192         CPPUNIT_ASSERT_EQUAL(
 193             o3tl::string_view::size_type(1), v.find_first_not_of('f'));
 194         CPPUNIT_ASSERT_EQUAL(
 195             o3tl::string_view::size_type(1), v.find_first_not_of("fxo", 0, 2));
 196         CPPUNIT_ASSERT_EQUAL(npos, v.find_first_not_of("fxo"));
 197         CPPUNIT_ASSERT_EQUAL(
 198             o3tl::string_view::size_type(1), v.find_last_not_of("fx"));
 199         CPPUNIT_ASSERT_EQUAL(
 200             o3tl::string_view::size_type(1), v.find_last_not_of('x'));
 201         CPPUNIT_ASSERT_EQUAL(
 202             o3tl::string_view::size_type(1),
 203             v.find_last_not_of("fxo", o3tl::string_view::npos, 2));
 204         CPPUNIT_ASSERT_EQUAL(npos, v.find_last_not_of("fxo"));
 205     }
 206 };
 207
 208 CPPUNIT_TEST_SUITE_REGISTRATION(Test);
 209
 210 }
 211
 212 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */