public void ThrowExceptionGivenInvalidString(string stringInput, string symbol)
{
// Arrange
OperationIdentifier systemUnderTest = new OperationIdentifier();
Should.Throw <ArgumentException>(() => systemUnderTest.GetNextOperationMatch(stringInput, symbol));
}
public void ShouldCollectAllDigitsEitherSide(string stringInput, string symbol, string expectedFirst)
{
// Arrange
OperationIdentifier systemUnderTest = new OperationIdentifier();
// Act
var result = systemUnderTest.GetNextOperationMatch(stringInput, symbol);
// Assert
result.ShouldBe(expectedFirst);
}