public void TestTranspositionGenerator()
{
var eg = new ErrorGenerator();
var classification = new Classification();
//set typo dictionary to explicit one -- it's empty so no typos are possible
Dictionary<Tuple<OptChar, string>, int> typo_dict = new Dictionary<Tuple<OptChar, string>, int>();
//Set the transpositions dictionary to explicit one
Dictionary<int, int> transpositions_dict = new Dictionary<int, int>();
transpositions_dict.Add(3, 10);
//transpositions_dict.Add(0, 1);
classification.SetTranspositionDict(transpositions_dict);
classification.SetTypoDict(typo_dict);
string s = eg.GenerateErrorString("abcd", classification);
Assert.AreEqual("dbca", s);
//NOTE: Need a new ErrorGenerator for each test because the distribution tables are associated with it
var eg2 = new ErrorGenerator();
//Set the transpositions dictionary to explicit one
var transpositions_dict2 = new Dictionary<int, int>();
transpositions_dict2.Add(1, 10);
//transpositions_dict2.Add(0, 1);
Classification classification2 = new Classification();
classification2.SetTranspositionDict(transpositions_dict2);
classification2.SetTypoDict(typo_dict);
string s2 = eg2.GenerateErrorString("abcd", classification2);
Assert.AreEqual("bcda", s2);
var eg3 = new ErrorGenerator();
//Set the transpositions dictionary to explicit one
var transpositions_dict3 = new Dictionary<int, int>();
transpositions_dict3.Add(10, 10);
transpositions_dict3.Add(-10, 10);
transpositions_dict3.Add(0, 1);
Classification classification3 = new Classification();
classification3.SetTranspositionDict(transpositions_dict3);
classification3.SetTypoDict(typo_dict);
string s3 = eg3.GenerateErrorString("abcd", classification3);
Assert.AreEqual("abcd", s3);
// TODO: this test originally checked that a certain class of error
// was impossible; what kind of error?
//Assert.AreEqual(0, result3.Item2.Count);
}
