public void Create()
{
IEnumerable <KeyValuePair <string, string> > pairs = new Dictionary <string, string>
{
{ "a", "b" }
};
var keyComparer = StringComparer.OrdinalIgnoreCase;
var dictionary = ImmutableSegmentedDictionary.Create <string, string>();
Assert.Equal(0, dictionary.Count);
Assert.Same(EqualityComparer <string> .Default, dictionary.KeyComparer);
dictionary = ImmutableSegmentedDictionary.Create <string, string>(keyComparer);
Assert.Equal(0, dictionary.Count);
Assert.Same(keyComparer, dictionary.KeyComparer);
dictionary = ImmutableSegmentedDictionary.CreateRange(pairs);
Assert.Equal(1, dictionary.Count);
Assert.Same(EqualityComparer <string> .Default, dictionary.KeyComparer);
dictionary = ImmutableSegmentedDictionary.CreateRange(keyComparer, pairs);
Assert.Equal(1, dictionary.Count);
Assert.Same(keyComparer, dictionary.KeyComparer);
}