public void TestIfGetRatioOfAtoEThrowsArgumentExceptionWhenThereIsNoLetterE()
        {
            //Arrange
            var sutText     = new FileContent(@"C:\Users\tomas\Dropbox\Codecool - C#\csharp-text-analyser-T5chrono\TextAnalser.Test\TestFiles\test_no_e_letter.txt");
            var sutAnalysis = new StatisticalAnalysis(sutText.GetCharIterator());

            //Assert
            Assert.Throws <ArgumentException>(() => sutAnalysis.GetRatioOfAtoE());
        }
        public void TestIfGetRatioOfAtoEReturnsProperRatio()
        {
            //Arrange
            var sutText     = new FileContent(@"C:\Users\tomas\Dropbox\Codecool - C#\csharp-text-analyser-T5chrono\TextAnalser.Test\TestFiles\test_simple.txt");
            var sutAnalysis = new StatisticalAnalysis(sutText.GetCharIterator());

            //Act
            var actual_value = sutAnalysis.GetRatioOfAtoE();

            //Assert
            Assert.Equal(1, actual_value);
        }