public virtual void TestNull()
{
Analyzer a = new WhitespaceAnalyzer();
AssertAnalyzesTo(a, "foo bar FOO BAR", new System.String[]{"foo", "bar", "FOO", "BAR"});
AssertAnalyzesTo(a, "foo bar . FOO <> BAR", new System.String[]{"foo", "bar", ".", "FOO", "<>", "BAR"});
AssertAnalyzesTo(a, "foo.bar.FOO.BAR", new System.String[]{"foo.bar.FOO.BAR"});
AssertAnalyzesTo(a, "U.S.A.", new System.String[]{"U.S.A."});
AssertAnalyzesTo(a, "C++", new System.String[]{"C++"});
AssertAnalyzesTo(a, "B2B", new System.String[]{"B2B"});
AssertAnalyzesTo(a, "2B", new System.String[]{"2B"});
AssertAnalyzesTo(a, "\"QUOTED\" word", new System.String[]{"\"QUOTED\"", "word"});
}