public void op_ToServiceType_string(string expected,
string telephone)
{
var actual = BritishTelephone.ToServiceType(telephone);
Assert.Equal(expected, actual);
}
public void op_ToServiceType_string_whenFormatException(string telephone)
{
Assert.Throws <FormatException>(() => BritishTelephone.ToServiceType(telephone));
}
public void op_ToServiceType_stringNull()
{
Assert.Throws <ArgumentNullException>(() => BritishTelephone.ToServiceType(null));
}