public void Compare_NonGeneric_ForNonStrings_UsesToString(object x, object y)
{
var uut = new AlphanumericComparer(StringComparison.Ordinal);
var expectedResult = uut.Compare(x.ToString(), y.ToString());
uut.Compare(x, y).ShouldBe(expectedResult);
}
public void Compare_NonGeneric_ForStrings_MatchesGeneric(object x, object y)
{
var uut = new AlphanumericComparer(StringComparison.Ordinal);
var expectedResult = uut.Compare(x, y);
uut.Compare(x, y).ShouldBe(expectedResult);
}
/// <summary>
/// Compares two alphanumeric version numbers and returns a value
/// indicating whether one is less than, equal to, or greater than the other.
/// </summary>
/// <param name="x">The first alphanumeric version number to compare.</param>
/// <param name="y">The second alphanumeric version number to compare.</param>
/// <returns>A signed integer that indicates the relative values of x and y.</returns>
public int Compare(string x, string y)
{
// Validate parameters
if (x == null)
{
throw new ArgumentNullException("x");
}
if (y == null)
{
throw new ArgumentNullException("y");
}
// Test for equality
if (x == y)
{
return(0);
}
// Split the different parts of the number
string[] xParts = x.Split('.');
string[] yParts = y.Split('.');
// Compare each parts
AlphanumericComparer alphaNumComparer = new AlphanumericComparer();
for (int i = 0, n = Math.Max(xParts.Length, yParts.Length); i < n; i++)
{
// If the part at index i is not in y => x is greater
if (i >= yParts.Length)
{
return(1);
}
// If the part at index i is not in x => y is greater
if (i >= xParts.Length)
{
return(-1);
}
// Compare the two alphanumerical numbers
int result = alphaNumComparer.Compare(xParts[i], yParts[i]);
if (result != 0)
{
return(result);
}
}
// The two numbers are equal (really??? I thought we tested for equality already!)
System.Diagnostics.Debug.Fail("Not supposed to reach this code...");
return(0);
}
public void Compare_Generic_ComparisonTypeIsIgnoreCase_IsCaseInsensitive(string x, string y, int expectedResult)
{
var uut = new AlphanumericComparer(StringComparison.OrdinalIgnoreCase);
uut.Compare(x, y).ShouldBe(expectedResult);
}
public void Compare_Generic_XIsEqualToY_Returns0(string x, string y)
{
var uut = new AlphanumericComparer(StringComparison.Ordinal);
uut.Compare(x, y).ShouldBe(0);
}
public void Compare_Generic_XIsGreaterThanY_Returns1(string x, string y)
{
var uut = new AlphanumericComparer(StringComparison.Ordinal);
uut.Compare(x, y).ShouldBe(1);
}
public void Compare_Generic_XIsLessThanY_ReturnsNegative1(string x, string y)
{
var uut = new AlphanumericComparer(StringComparison.Ordinal);
uut.Compare(x, y).ShouldBe(-1);
}