public double DiceCoefficient(string compareTo)
{
Bigram compareBigram = new Bigram(compareTo);
var intersection = this.BigramSet.Intersect(compareBigram.BigramSet);
return CalculateDiceCoefficient(intersection.Count(), this.BigramSet.Count, compareBigram.BigramSet.Count);
}
public double DiceCoefficient(Bigram compareTo)
{
if (compareTo == null) throw new ArgumentNullException("compareTo");
var intersection = this.BigramSet.Intersect(compareTo.BigramSet);
return CalculateDiceCoefficient(intersection.Count(), this.BigramSet.Count, compareTo.BigramSet.Count);
}
public void Constructor_Empty_String_Yields_Empty_Set()
{
string testValue = string.Empty;
int expected = 0;
var sut = new Bigram(testValue);
var result = sut.BigramSet;
Assert.That(result.Count, Is.EqualTo(expected));
}
public void Constructor_Two_Char_String_Yields_One_Item_Set()
{
string testValue = "hi";
string expected = "hi";
int expectedCount = 1;
var sut = new Bigram(testValue);
var result = sut.BigramSet;
Assert.That(result.Count, Is.EqualTo(expectedCount));
Assert.That(result.Contains(expected), Is.True);
}
public void DiceCoefficient_Completely_Different_Bigrams_Returns_0()
{
string testValue1 = "abcd";
string testValue2 = "wxyz";
double expected = 0.0;
var sut = new Bigram(testValue1);
var sutCompare = new Bigram(testValue2);
var result = sut.DiceCoefficient(sutCompare);
Assert.That(result, Is.EqualTo(expected));
}
public void Constructor_Multi_Char_String_Yields_Correct_Item_Set()
{
string testValue = "hello";
int expectedCount = 4;
var sut = new Bigram(testValue);
var result = sut.BigramSet;
Assert.That(result.Count, Is.EqualTo(expectedCount));
Assert.That(result.Contains("he"), Is.True);
Assert.That(result.Contains("el"), Is.True);
Assert.That(result.Contains("ll"), Is.True);
Assert.That(result.Contains("lo"), Is.True);
}
public void InitializeWithValue_Repeat_Pairs_Yields_One_Item_Set()
{
string testValue = "iiii";
string expected = "ii";
int expectedCount = 1;
var sut = new Bigram();
sut.InitializeForValue(testValue);
var result = sut.BigramSet;
Assert.That(result.Count, Is.EqualTo(expectedCount));
Assert.That(result.Contains(expected), Is.True);
}
public void InitializeWithValue_Empty_String_Yields_Empty_Set()
{
string testValue = string.Empty;
int expected = 0;
var sut = new Bigram();
sut.InitializeForValue(testValue);
var result = sut.BigramSet;
Assert.That(result.Count, Is.EqualTo(expected));
}
public void DiceCoefficient_Matching_Strings_Returns_1()
{
string testValue = "test";
double expected = 1.0;
var sut = new Bigram(testValue);
var sutCompare = new Bigram(testValue);
var result = sut.DiceCoefficient(testValue);
Assert.That(result, Is.EqualTo(expected));
}