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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Text;
using System.Globalization;
using TestLibrary;
public class StringCompare
{
public static string[] InterestingStrings = new string[] { null, "", "a", "1", "-", "A", "!", "abc", "aBc", "a\u0400Bc", "I", "i", "\u0130", "\u0131", "A", "\uFF21", "\uFE57"};
public bool RunTests()
{
bool retVal = true;
TestLibrary.TestFramework.LogInformation("[Positive]");
retVal = PosTest1() && retVal;
retVal = PosTest2() && retVal;
retVal = PosTest3() && retVal;
retVal = PosTest4() && retVal;
return retVal;
}
public bool PosTest1()
{
bool retVal = true;
TestLibrary.TestFramework.BeginScenario("PosTest1: Compare interesting strings ordinally");
try
{
foreach (string s in InterestingStrings)
{
foreach (string r in InterestingStrings)
{
retVal &= TestStrings(s, r);
}
}
}
catch (Exception e)
{
TestLibrary.TestFramework.LogError("001.2", "Unexpected exception: " + e);
retVal = false;
}
return retVal;
}
public bool PosTest2()
{
bool retVal = true;
TestLibrary.TestFramework.BeginScenario("PosTest2: Compare many characters");
try
{
for (int i = 0; i < 40; i++) // Ok, 40 isn't that many... but this takes way too long
{
char c = Generator.GetChar(-55);
if (string.Compare(new string(new char[] { c }), new string(new char[] { c }), StringComparison.Ordinal) != 0)
{
TestLibrary.TestFramework.LogError("002.1", "Character " + i.ToString() + " is not equal to itself ordinally!");
retVal = false;
}
for (int j = 0; j < (int)c; j++)
{
int compareResult = string.Compare(new string(new char[] { c }), new string(new char[] { (char)j }), StringComparison.Ordinal);
if (compareResult != 0) compareResult = compareResult / Math.Abs(compareResult);
if (compareResult != 1)
{
TestLibrary.TestFramework.LogError("002.2", "Character " + ((int)c).ToString() + " is not greater than character " + j.ToString() + ", Compare result: " + compareResult.ToString());
retVal = false;
}
}
}
}
catch (Exception e)
{
TestLibrary.TestFramework.LogError("002.4", "Unexpected exception: " + e);
retVal = false;
}
return retVal;
}
public bool PosTest3()
{
bool retVal = true;
TestLibrary.TestFramework.BeginScenario("PosTest3: Compare many strings");
try
{
for (int i = 0; i < 1000; i++)
{
string str1 = Generator.GetString(-55, false, 5, 20);
string str2 = Generator.GetString(-55, false, 5, 20);
if (string.Compare(str1, str1, StringComparison.Ordinal) != 0)
{
TestLibrary.TestFramework.LogError("003.1", "Comparison not as expected! Actual result: " + string.Compare(str1, str1, StringComparison.Ordinal).ToString() + ", Expected result: 0");
TestLibrary.TestFramework.LogInformation("String 1: <" + str1 + "> : " + BytesFromString(str1) + "\nString 2: <" + str1 + "> : " + BytesFromString(str1));
retVal = false;
}
if (string.Compare(str2, str2, StringComparison.Ordinal) != 0)
{
TestLibrary.TestFramework.LogError("003.2", "Comparison not as expected! Actual result: " + string.Compare(str2, str2, StringComparison.Ordinal).ToString() + ", Expected result: 0");
TestLibrary.TestFramework.LogInformation("String 1: <" + str2 + "> : " + BytesFromString(str2) + "\nString 2: <" + str2 + "> : " + BytesFromString(str2));
retVal = false;
}
TestStrings(str1, str2);
}
}
catch (Exception e)
{
TestLibrary.TestFramework.LogError("003.4", "Unexpected exception: " + e);
retVal = false;
}
return retVal;
}
public bool PosTest4()
{
bool retVal = true;
TestLibrary.TestFramework.BeginScenario("PosTest4: Specific regression cases");
try
{
CultureInfo oldCi = Utilities.CurrentCulture;
Utilities.CurrentCulture = new CultureInfo("hu-HU");
retVal &= TestStrings("dzsdzs", "ddzs");
Utilities.CurrentCulture = oldCi;
retVal &= TestStrings("\u00C0nimal", "A\u0300nimal");
}
catch (Exception e)
{
TestLibrary.TestFramework.LogError("004.2", "Unexpected exception: " + e);
retVal = false;
}
return retVal;
}
public static int Main()
{
StringCompare test = new StringCompare();
TestLibrary.TestFramework.BeginTestCase("StringCompare");
if (test.RunTests())
{
TestLibrary.TestFramework.EndTestCase();
TestLibrary.TestFramework.LogInformation("PASS");
return 100;
}
else
{
TestLibrary.TestFramework.EndTestCase();
TestLibrary.TestFramework.LogInformation("FAIL");
return 0;
}
}
private bool TestStrings(string str1, string str2)
{
bool retVal = true;
int expectValue = PredictValue(str1, str2);
int actualValue = String.Compare(str1, str2, StringComparison.Ordinal);
if (expectValue != 0) expectValue = expectValue / Math.Abs(expectValue);
if (actualValue != 0) actualValue = actualValue / Math.Abs(actualValue);
if (actualValue != expectValue)
{
TestLibrary.TestFramework.LogError("001.1", "Comparison not as expected! Actual result: " + actualValue + ", Expected result: " + expectValue);
TestLibrary.TestFramework.LogInformation("String 1: <" + str1 + "> : " + BytesFromString(str1) + "\nString 2: <" + str2 + "> : " + BytesFromString(str2));
retVal = false;
}
return retVal;
}
int PredictValue(string str1, string str2)
{
if (str1 == null)
{
if (str2 == null) return 0;
else return -1;
}
if (str2 == null) return 1;
for (int i = 0; i < str1.Length; i++)
{
if (i >= str2.Length) return 1;
if ((int)str1[i] > (int)str2[i]) return 1;
if ((int)str1[i] < (int)str2[i]) return -1;
}
if (str2.Length > str1.Length) return -1;
return 0;
}
private static string BytesFromString(string str)
{
if (str == null) return string.Empty;
StringBuilder output = new StringBuilder();
for (int i = 0; i < str.Length; i++)
{
output.Append(Utilities.ByteArrayToString(BitConverter.GetBytes(str[i])));
if (i != (str.Length - 1)) output.Append(", ");
}
return output.ToString();
}
}
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