public void Parse_uses_parser_service(IParsesFraction parser,
string fractionString,
Fraction fraction)
{
Fraction.Parser = parser;
Mock.Get(parser).Setup(x => x.Parse(fractionString)).Returns(fraction);
Assert.That(() => Fraction.Parse(fractionString), Is.EqualTo(fraction));
}
/// <summary>
/// Resets the internal services which are used by the <see cref="Fraction"/> class for
/// parsing, simplification and formatting.
/// </summary>
internal static void ResetServices()
{
Parser = new FractionParser();
Simplifier = new FractionSimplifier();
Formatter = new FractionFormatter(Simplifier);
}