sal/qa/rtl/strings/nonconstarray.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 <cppunit/TestAssert.h>
  13 #include <cppunit/TestFixture.h>
  14 #include <cppunit/extensions/HelperMacros.h>
  15 #include <rtl/strbuf.hxx>
  16 #include <rtl/string.hxx>
  17 #include <rtl/ustring.hxx>
  18
  19 namespace
  20 {
  21 OString returnOString()
  22 {
  23     char buf[] = "foo\0bar";
  24     return buf;
  25 }
  26
  27 OStringBuffer returnOStringBuffer()
  28 {
  29     char buf[] = "foo\0bar";
  30     return buf;
  31 }
  32
  33 class Test : public CppUnit::TestFixture
  34 {
  35 private:
  36     void testOString()
  37     {
  38         struct S
  39         {
  40             char a[4];
  41         };
  42         S s{ "x\0y" };
  43         CPPUNIT_ASSERT_EQUAL(sal_Int32(1), OString(s.a).getLength());
  44         // Ideally, the below would work the same as the above.  However, the const reference makes
  45         // the ConstCharArrayDetector instead of the NonConstCharArrayDetector kick in, so that the
  46         // call to OString(r.a) would fire the ConstCharArrayDetector<T>::isValid assert (and in
  47         // NDEBUG builds the CPPUNIT_ASSERT_EQUAL would fail with 3 != 1):
  48         if ((false))
  49         {
  50             S const& r = s;
  51             CPPUNIT_ASSERT_EQUAL(sal_Int32(1), OString(r.a).getLength());
  52         }
  53     }
  54
  55     void testOUStringChar()
  56     {
  57         struct S
  58         {
  59             char a[4];
  60         };
  61         S s{ "x\0y" };
  62         // This would fail to compile, as there is no OUString ctor taking a
  63         // NonConstCharArrayDetector char array:
  64 #if 0
  65         CPPUNIT_ASSERT_EQUAL(sal_Int32(1), OUString(s.a).getLength());
  66 #endif
  67         // Ideally, the below would fail to compile the same as the above.  However, the const
  68         // reference makes the ConstCharArrayDetector instead of the NonConstCharArrayDetector kick
  69         // in, so that the call to OUString(r.a) would fire the ConstCharArrayDetector<T>::isValid
  70         // assert (and in NDEBUG builds the CPPUNIT_ASSERT_EQUAL would fail with 3 != 1):
  71         if ((false))
  72         {
  73             S const& r = s;
  74             CPPUNIT_ASSERT_EQUAL(sal_Int32(1), OUString(r.a).getLength());
  75         }
  76     }
  77
  78     void testOUStringChar16t()
  79     {
  80         struct S
  81         {
  82             char16_t a[4];
  83         };
  84         S s{ u"x\0y" };
  85         CPPUNIT_ASSERT_EQUAL(sal_Int32(1), OUString(s.a).getLength());
  86         // Ideally, the below would work the same as the above.  However, the const reference makes
  87         // the ConstCharArrayDetector instead of the NonConstCharArrayDetector kick in, so that the
  88         // call to OUString(r.a) would fire the ConstCharArrayDetector<T>::isValid assert (and in
  89         // NDEBUG builds the CPPUNIT_ASSERT_EQUAL would fail with 3 != 1)::
  90         if ((false))
  91         {
  92             S const& r = s;
  93             CPPUNIT_ASSERT_EQUAL(sal_Int32(1), OUString(r.a).getLength());
  94         }
  95     }
  96
  97     void testP2266R3()
  98     {
  99         CPPUNIT_ASSERT_EQUAL(OString("foo"), returnOString());
 100         CPPUNIT_ASSERT_EQUAL(OString("foo"), returnOStringBuffer().makeStringAndClear());
 101     }
 102
 103     CPPUNIT_TEST_SUITE(Test);
 104     CPPUNIT_TEST(testOString);
 105     CPPUNIT_TEST(testOUStringChar);
 106     CPPUNIT_TEST(testOUStringChar16t);
 107     CPPUNIT_TEST(testP2266R3);
 108     CPPUNIT_TEST_SUITE_END();
 109 };
 110
 111 CPPUNIT_TEST_SUITE_REGISTRATION(Test);
 112 }
 113
 114 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */