public void GetCount_WhenSubstringNotPresent_ReturnsZero()
{
var sut = new PatternMatcher("abra kadabra");
Assert.AreEqual(0, sut.GetCount("z"));
}
public void GetCount_WhenGivenSubstringLongerThanText_ReturnsZero()
{
var sut = new PatternMatcher("abra kadabra");
Assert.AreEqual(0, sut.GetCount("abra kadabra kabra"));
}
public void GetCount_WhenSubstringIsPresent_ReturnsCount(string subString, int expectedCount)
{
var sut = new PatternMatcher("abra kadabra");
Assert.AreEqual(expectedCount, sut.GetCount(subString));
}
public void GetCount_WhenGivenNullSubstring_ThrowsArgumentNullException()
{
var sut = new PatternMatcher("abra kadabra");
Assert.Throws<ArgumentNullException>(() => sut.GetCount(null));
}
