public void BuildCharsStats_Empty()
{
var target = new StatService();
var result = target.BuildCharsStats(null, null);
Assert.IsNotNull(result);
Assert.AreEqual(result.TotalCharsInText, 0);
Assert.IsNull(result.AllCharsOrderedByAppearance);
}
public void BuildCharsStats_Positive()
{
var target = new StatService();
var result = target.BuildCharsStats(_totalText, _chars);
Assert.IsNotNull(result);
Assert.AreEqual(result.TotalCharsInText, _totalText.Length);
Assert.IsNotNull(result.AllCharsOrderedByAppearance);
Assert.AreEqual(result.AllCharsOrderedByAppearance.ElementAtOrDefault(0)?.AChar, 'e');
Assert.AreEqual(result.AllCharsOrderedByAppearance.ElementAtOrDefault(4)?.AChar, 'a');
}
