113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// TGUI - Texus' Graphical User Interface
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// Copyright (C) 2012-2018 Bruno Van de Velde (vdv_b@tgui.eu)
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//
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// This software is provided 'as-is', without any express or implied warranty.
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// In no event will the authors be held liable for any damages arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it freely,
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// subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented;
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// you must not claim that you wrote the original software.
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// If you use this software in a product, an acknowledgment
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// in the product documentation would be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such,
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// and must not be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source distribution.
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//
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/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#include "Tests.hpp"
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#include <fstream>
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#include <cstring>
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bool compareFiles(const std::string& leftFileName, const std::string& rightFileName)
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{
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std::ifstream leftFile;
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std::ifstream rightFile;
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char leftRead = 0;
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char rightRead = 0;
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bool result;
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// Open the two files.
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leftFile.open(leftFileName.c_str());
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if (!leftFile.is_open())
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return false;
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rightFile.open(rightFileName.c_str());
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if (!rightFile.is_open())
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{
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leftFile.close();
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return false;
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}
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result = true; // Files exist and are open, assuming equality unless a counterexamples shows up
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while (result && leftFile.good() && rightFile.good())
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{
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leftFile.get(leftRead);
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rightFile.get(rightRead);
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result = (leftRead == rightRead);
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}
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if (result)
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{
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// Last read was still equal, are we at the end of both files?
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result = (!leftFile.good()) && (!rightFile.good());
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}
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leftFile.close();
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rightFile.close();
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return result;
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}
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// Tests the file comparison function
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TEST_CASE("compareFiles")
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{
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std::ofstream myfile;
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myfile.open("file1.txt");
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myfile.close();
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myfile.open("file2.txt");
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myfile.close();
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// Compare 2 empty files
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REQUIRE(compareFiles("file1.txt", "file2.txt"));
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REQUIRE(compareFiles("file2.txt", "file1.txt"));
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// Compare an empty and a non-empty files
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myfile.open("file1.txt");
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myfile << "xxx" << std::endl << "yyy";
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myfile.close();
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REQUIRE(!compareFiles("file1.txt", "file2.txt"));
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REQUIRE(!compareFiles("file2.txt", "file1.txt"));
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// Compare two equal files
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myfile.open("file2.txt");
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myfile << "xxx" << std::endl << "yyy";
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myfile.close();
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REQUIRE(compareFiles("file1.txt", "file2.txt"));
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REQUIRE(compareFiles("file2.txt", "file1.txt"));
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// Compare 2 non-empty files which are off by a character in the middle
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myfile.open("file2.txt");
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myfile << "xxx" << std::endl << "xyy";
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myfile.close();
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REQUIRE(!compareFiles("file1.txt", "file2.txt"));
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REQUIRE(!compareFiles("file2.txt", "file1.txt"));
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// Compare 2 non-empty files where one is one character shorter than the other
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myfile.open("file2.txt");
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myfile << "xxx" << std::endl << "yy";
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myfile.close();
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REQUIRE(!compareFiles("file1.txt", "file2.txt"));
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REQUIRE(!compareFiles("file2.txt", "file1.txt"));
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// Compare existig against non existing file
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REQUIRE(!compareFiles("file1.txt", "nonexisting.txt"));
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REQUIRE(!compareFiles("nonexisting.txt", "file1.txt"));
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}
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