static void CheckEnumerable(IEnumerable <IExpression> input, int expectedPosition)
{
var underTest = new SimplificationEvaluator();
var frozen = input as IExpression[] ?? input.ToArray();
var expected = frozen.ElementAt(expectedPosition);
underTest.FindSmallesExpressionInEnumerable(frozen).Should().Be(expected);
}
static void CheckCount(string input, int expected)
{
var tokens = Tokenize(input);
var inputTree = CreateInMemoryModel(tokens);
var underTest = new SimplificationEvaluator();
underTest.CountExpression(inputTree).Should().Be(expected);
}
