Enterprise Library Test Guide - Willy .Net

Testing for Globalization Best Practices 163
Test case
Verify that the collection classes
use culture-independent operations
to sort the keys.
Example
For example, the .NET Framework SortedList class represents
a collection of key/value pairs that are sorted by
the keys. A SortedList element can be accessed by its key
or by its index. When you use a SortedList object whose
keys are strings, the sorting and lookup operations can be
affected by the Thread.CurrentCulture property. To obtain
culture-independent behavior from a SortedList object,
create it with one of the constructors that accepts an
IComparer interface as a parameter. This parameter specifies
the IComparer implementation to use when comparing
keys. For the IComparer parameter, specify a custom
comparer class that uses the CultureInfo.InvariantCulture
property to compare keys. The following example illustrates
a custom culture-insensitive implementation of the
IComparer interface that you can specify as the IComparer
parameter to a SortedList constructor.
internal class InvariantComparer : IComparer
{
private CompareInfo m_compareInfo;
internal static readonly InvariantComparer
Default = new
InvariantComparer();
internal InvariantComparer()
{
m_compareInfo = CultureInfo.Invariant-
Culture.CompareInfo;
}
}
public int Compare(Object a, Object b)
{
String sa = a as String;
String sb = b as String;
return m_compareInfo.Compare(sa, sb);
}
Pseudo-Localization Testing
Pseudo-localization may be the most effective way of finding localizability bugs.
This technique involves translating the application block’s localizable resources into
something readable but drastically different from normal text. For example, you
could replace every “a” with an “â”. Pseudo-localization also adds extra padding
characters to the ends of strings. The types of errors that pseudo-localization helps
you find are hard-coded strings that need internationalization, strings that should
not be translated, non-Latin characters, and errors handling longer language strings.
A pseudo-localized version of an application block should behave the same as the
original version.