lucre 0.13.0

//! Reading of [`Money`] values from text.

use std::{ops::Range, str::FromStr};

use miette::Diagnostic;
use rust_decimal::Decimal;
use thiserror::Error;

use crate::{Currency, Money};

/// A reusable set of options for reading monetary amounts from text.
///
/// Start from [`Parser::new`] (or [`Parser::default`]) and change it with the
/// builder methods. Building one cannot fail. [`Money`]'s [`FromStr`] impl
/// uses the starting options, so common text needs no `Parser` at all.
///
/// The options match [`Format`](crate::Format)'s. A `Parser` reads back
/// anything a `Format` writes, so long as it uses the same separators and, if
/// the text has no ISO code, assumes the right currency.
///
/// ## Example
///
/// ```
/// # use std::error::Error;
/// #
/// # fn main() -> Result<(), Box<dyn Error>> {
/// use lucre::{Currency, Money, Parser};
///
/// let parser = Parser::new();
/// let expected = Money::from_minor(-150_000, Currency::USD);
///
/// // The starting options read an ISO code on either side of the digits,
/// // commas between digit groups, a dot for the decimal mark, and a minus
/// // sign or parentheses for negatives.
/// assert_eq!(parser.parse("-1,500.00 usd")?, expected);
/// assert_eq!(parser.parse("(USD 1,500.00)")?, expected);
/// #
/// #     Ok(())
/// # }
/// ```
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub struct Parser {
    assumed: Option<Currency>,
    group_separator: char,
    decimal_separator: char,
}

impl Parser {
    /// The starting options: commas between digit groups, a dot for the
    /// decimal mark, and no assumed currency, so the text must name an ISO
    /// code.
    ///
    /// ## Example
    ///
    /// ```
    /// # use std::error::Error;
    /// #
    /// # fn main() -> Result<(), Box<dyn Error>> {
    /// use lucre::{Currency, Money, Parser};
    ///
    /// let parser = Parser::new();
    ///
    /// assert_eq!(
    ///     parser.parse("1,500.00 USD")?,
    ///     Money::from_minor(150_000, Currency::USD)
    /// );
    /// assert!(parser.parse("1,500.00").is_err());
    /// #
    /// #     Ok(())
    /// # }
    /// ```
    #[must_use]
    pub const fn new() -> Self {
        Self {
            assumed: None,
            group_separator: ',',
            decimal_separator: '.',
        }
    }

    /// Set the characters that separate digit groups and mark the start of
    /// the fraction.
    ///
    /// ## Example
    ///
    /// ```
    /// # use std::error::Error;
    /// #
    /// # fn main() -> Result<(), Box<dyn Error>> {
    /// use lucre::{Currency, Money, Parser};
    ///
    /// let parser = Parser::new().separators('.', ',');
    ///
    /// assert_eq!(
    ///     parser.parse("1.500,00 EUR")?,
    ///     Money::from_minor(150_000, Currency::EUR)
    /// );
    /// #
    /// #     Ok(())
    /// # }
    /// ```
    #[must_use]
    pub const fn separators(mut self, group: char, decimal: char) -> Self {
        self.group_separator = group;
        self.decimal_separator = decimal;
        self
    }

    /// Use `currency` when the text names none.
    ///
    /// ## Example
    ///
    /// ```
    /// # use std::error::Error;
    /// #
    /// # fn main() -> Result<(), Box<dyn Error>> {
    /// use lucre::{Currency, Money, Parser};
    ///
    /// let parser = Parser::new().assume_currency(Currency::USD);
    ///
    /// assert_eq!(parser.parse("1.50")?, Money::from_minor(150, Currency::USD));
    ///
    /// // An assumed currency also lets the text name it by symbol.
    /// assert_eq!(parser.parse("$1.50")?, Money::from_minor(150, Currency::USD));
    ///
    /// // An ISO code in the text takes priority over the assumed currency.
    /// assert_eq!(parser.parse("1.50 EUR")?, Money::from_minor(150, Currency::EUR));
    /// #
    /// #     Ok(())
    /// # }
    /// ```
    #[must_use]
    pub const fn assume_currency(mut self, currency: Currency) -> Self {
        self.assumed = Some(currency);
        self
    }

    /// Reads one monetary amount from `text`, ignoring surrounding
    /// whitespace.
    ///
    /// The digits are kept as written, as by [`Money::from_decimal`]. Nothing
    /// is rounded or padded to the currency's minor digits.
    ///
    /// A [`Decimal`] holds 29 digits at most, and no more than 28 of them
    /// after the decimal mark. Fraction digits past that are rounded away.
    ///
    /// ## Example
    ///
    /// ```
    /// # use std::error::Error;
    /// #
    /// # fn main() -> Result<(), Box<dyn Error>> {
    /// use lucre::{Currency, Money, Parser};
    ///
    /// let parser = Parser::new().assume_currency(Currency::USD);
    /// let expected = Money::from_minor(150, Currency::USD);
    ///
    /// // The currency may be named before or after the digits, by ISO code
    /// // in any case or by the symbol of the currency that applies. Both
    /// // sides may name it as long as they agree. Text that names neither
    /// // uses the assumed currency.
    /// assert_eq!(parser.parse("1.50 usd")?, expected);
    /// assert_eq!(parser.parse("USD 1.50")?, expected);
    /// assert_eq!(parser.parse("$1.50 USD")?, expected);
    /// assert_eq!(parser.parse("1.50")?, expected);
    ///
    /// // A negative amount is marked by parentheses around the whole text,
    /// // or by one minus sign, at the front or right before the digits.
    /// let negative = Money::from_minor(-150, Currency::USD);
    /// assert_eq!(parser.parse("(1.50)")?, negative);
    /// assert_eq!(parser.parse("$-1.50")?, negative);
    ///
    /// // Group separators may appear anywhere before the decimal mark.
    /// // Their spacing is not checked.
    /// assert_eq!(
    ///     parser.parse("1,00,0.50")?,
    ///     Money::from_decimal("1000.50".parse()?, Currency::USD)
    /// );
    /// #
    /// #     Ok(())
    /// # }
    /// ```
    ///
    /// ## Errors
    ///
    /// Returns [`ParseMoneyError::MissingCurrency`] if the text names no currency and none is assumed.
    /// Returns [`ParseMoneyError::UnknownCurrency`] if a named currency matches no ISO code and no symbol of the currency that applies.
    /// Returns [`ParseMoneyError::ConflictingCurrencies`] if the text names two different currencies.
    /// Returns [`ParseMoneyError::InvalidAmount`] if the digits are missing, malformed, or too large for a [`Decimal`].
    pub fn parse(self, text: &str) -> Result<Money, ParseMoneyError> {
        let mut s = text.trim();
        let mut negative = false;

        if let Some(inner) = s.strip_prefix('(').and_then(|r| r.strip_suffix(')')) {
            negative = true;
            s = inner.trim();
        }
        if let Some(rest) = s.strip_prefix('-') {
            if negative {
                return Err(ParseMoneyError::InvalidAmount {
                    text: text.to_string(),
                    at: span_of(text, &s[..1]),
                });
            }
            negative = true;
            s = rest.trim_start();
        }

        let no_digits = || ParseMoneyError::InvalidAmount {
            text: text.to_string(),
            at: span_of(text, s),
        };
        let first = s.find(|c: char| c.is_ascii_digit()).ok_or_else(no_digits)?;
        let last = s
            .rfind(|c: char| c.is_ascii_digit())
            .ok_or_else(no_digits)?;

        let mut prefix = s[..first].trim_end();
        let suffix = s[last + 1..].trim_start();

        // A minus between a leading identifier and the digits, as in
        // `$-1.50`, ends up at the end of the prefix token. Take it as the
        // sign.
        if let Some(stripped) = prefix.strip_suffix('-') {
            if negative {
                return Err(ParseMoneyError::InvalidAmount {
                    text: text.to_string(),
                    at: span_of(text, &prefix[stripped.len()..]),
                });
            }
            negative = true;
            prefix = stripped.trim_end();
        }

        let currency = self.identify(text, prefix, suffix)?.ok_or_else(|| {
            ParseMoneyError::MissingCurrency {
                text: text.to_string(),
                at: span_of(text, s),
            }
        })?;
        let amount = self.read_amount(text, &s[first..=last], negative)?;
        Ok(Money::from_decimal(amount, currency))
    }

    /// Settles the tokens around the digits on one currency. ISO codes are
    /// read first, so a symbol on the other side is checked against the coded
    /// currency rather than the assumed one.
    ///
    /// Returns `None` if neither token names a currency and this `Parser`
    /// assumes none. `text` is what the spans in any error count from, and
    /// both tokens must be subslices of it.
    fn identify(
        self,
        text: &str,
        prefix: &str,
        suffix: &str,
    ) -> Result<Option<Currency>, ParseMoneyError> {
        let mut coded: Option<(Currency, Range<usize>)> = None;
        let mut symbols = [None, None];
        for (slot, token) in symbols.iter_mut().zip([prefix, suffix]) {
            if token.is_empty() {
                continue;
            }
            match Currency::from_alphabetic_code(&token.to_ascii_uppercase()) {
                Some(found) => {
                    if let Some((seen, first)) = &coded
                        && *seen != found
                    {
                        return Err(ParseMoneyError::ConflictingCurrencies {
                            text: text.to_string(),
                            first: first.clone(),
                            second: span_of(text, token),
                        });
                    }
                    coded = Some((found, span_of(text, token)));
                }
                None => *slot = Some(token),
            }
        }
        let mut currency = coded.map(|(found, _)| found);
        for token in symbols.into_iter().flatten() {
            let claimed = currency
                .or(self.assumed)
                .filter(|c| c.symbol() == token)
                .ok_or_else(|| ParseMoneyError::UnknownCurrency {
                    text: text.to_string(),
                    token: token.to_string(),
                    at: span_of(text, token),
                })?;
            currency = Some(claimed);
        }
        Ok(currency.or(self.assumed))
    }

    /// Reads the text from the first digit to the last as a `Decimal`,
    /// dropping group separators and replacing the decimal mark with a dot.
    ///
    /// `text` is what the spans in any error count from, and `digits` must be
    /// a subslice of it.
    fn read_amount(
        self,
        text: &str,
        digits: &str,
        negative: bool,
    ) -> Result<Decimal, ParseMoneyError> {
        let mut normalized = String::with_capacity(digits.len() + 1);
        if negative {
            normalized.push('-');
        }
        let mut in_fraction = false;
        for (i, c) in digits.char_indices() {
            if c.is_ascii_digit() {
                normalized.push(c);
            } else if c == self.decimal_separator && !in_fraction {
                in_fraction = true;
                normalized.push('.');
            } else if c == self.group_separator && !in_fraction {
                // Group separators add nothing to the value.
            } else {
                let start = span_of(text, digits).start + i;
                return Err(ParseMoneyError::InvalidAmount {
                    text: text.to_string(),
                    at: start..start + c.len_utf8(),
                });
            }
        }
        Decimal::from_str(&normalized).map_err(|_| ParseMoneyError::InvalidAmount {
            text: text.to_string(),
            at: span_of(text, digits),
        })
    }
}

/// The byte range that `inner` covers in `outer`.
///
/// `inner` must be a subslice of `outer`. A separate string that happens to
/// hold the same characters gives a meaningless answer.
fn span_of(outer: &str, inner: &str) -> Range<usize> {
    let start = inner.as_ptr().addr() - outer.as_ptr().addr();
    start..start + inner.len()
}

impl Default for Parser {
    fn default() -> Self {
        Self::new()
    }
}

/// Parses as [`Parser::new`] describes.
///
/// ## Example
///
/// ```
/// # use std::error::Error;
/// #
/// # fn main() -> Result<(), Box<dyn Error>> {
/// use lucre::{Currency, Money};
///
/// let expected = Money::from_minor(150_000, Currency::USD);
///
/// assert_eq!("1,500.00 USD".parse::<Money>()?, expected);
/// assert_eq!("USD 1,500.00".parse::<Money>()?, expected);
/// #
/// #     Ok(())
/// # }
/// ```
impl FromStr for Money {
    type Err = ParseMoneyError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        Parser::new().parse(s)
    }
}

/// An error from reading a monetary amount from text.
///
/// Every variant keeps the text the [`Parser`] read and points into it by
/// byte range. The ranges count from the start of that text, leading
/// whitespace included, so they index it as it was handed in.
#[derive(Clone, Debug, Diagnostic, Error, Eq, PartialEq)]
#[diagnostic(url(docsrs))]
#[non_exhaustive]
pub enum ParseMoneyError {
    /// The text named no currency, and the [`Parser`] assumes none.
    #[error("the text names no currency, and the parser assumes none")]
    #[diagnostic(
        code(lucre::money::parse::missing_currency),
        help("name a currency in the text, or give the `Parser` one to assume")
    )]
    MissingCurrency {
        /// The text the [`Parser`] read.
        #[source_code]
        text: String,
        /// Covers the text without its surrounding whitespace.
        #[label("no currency here")]
        at: Range<usize>,
    },

    /// The text named a currency that matches no ISO code and no symbol of
    /// the currency that applies.
    #[error("no currency matches {token:?}")]
    #[diagnostic(
        code(lucre::money::parse::unknown_currency),
        help("name a currency by its ISO 4217 code, or by the symbol of the one assumed")
    )]
    UnknownCurrency {
        /// The text the [`Parser`] read.
        #[source_code]
        text: String,
        /// The part that matched nothing.
        token: String,
        /// Covers `token`.
        #[label("matches no currency")]
        at: Range<usize>,
    },

    /// The text named two different currencies.
    #[error("the text names more than one currency")]
    #[diagnostic(
        code(lucre::money::parse::conflicting_currencies),
        help("an amount is in one currency; drop whichever of the two the text does not mean")
    )]
    ConflictingCurrencies {
        /// The text the [`Parser`] read.
        #[source_code]
        text: String,
        /// Covers the currency written first.
        #[label("one currency")]
        first: Range<usize>,
        /// Covers the currency written second.
        #[label("a different currency")]
        second: Range<usize>,
    },

    /// The digits are missing, malformed, or too large for a [`Decimal`].
    #[error("the amount is missing, malformed, or too large for a decimal")]
    #[diagnostic(
        code(lucre::money::parse::invalid_amount),
        help("a `Decimal` holds up to 28 significant digits")
    )]
    InvalidAmount {
        /// The text the [`Parser`] read.
        #[source_code]
        text: String,
        /// Covers the character at fault. Covers every digit when the amount
        /// is too large, and the text without its surrounding whitespace when
        /// the text holds no digits.
        #[label("not part of a valid amount")]
        at: Range<usize>,
    },
}

impl ParseMoneyError {
    /// The text the [`Parser`] read.
    ///
    /// ## Example
    ///
    /// ```
    /// use lucre::Money;
    ///
    /// let error = "  1.50 ZZZ".parse::<Money>().unwrap_err();
    ///
    /// assert_eq!(error.text(), "  1.50 ZZZ");
    /// assert_eq!(&error.text()[error.span()], "ZZZ");
    /// ```
    #[must_use]
    pub fn text(&self) -> &str {
        match self {
            Self::MissingCurrency { text, .. }
            | Self::UnknownCurrency { text, .. }
            | Self::ConflictingCurrencies { text, .. }
            | Self::InvalidAmount { text, .. } => text,
        }
    }

    /// The byte range the error points at.
    ///
    /// [`ConflictingCurrencies`](Self::ConflictingCurrencies) names two
    /// currencies. This returns the first of them.
    ///
    /// ## Example
    ///
    /// ```
    /// use lucre::Money;
    ///
    /// let error = "1.50 ZZZ".parse::<Money>().unwrap_err();
    ///
    /// assert_eq!(error.span(), 5..8);
    /// ```
    #[must_use]
    pub fn span(&self) -> Range<usize> {
        match self {
            Self::MissingCurrency { at, .. }
            | Self::UnknownCurrency { at, .. }
            | Self::InvalidAmount { at, .. } => at.clone(),
            Self::ConflictingCurrencies { first, .. } => first.clone(),
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::Format;
    use rust_decimal::prelude::*;

    #[test]
    fn code_suffix_test() {
        let money: Money = "1,500.00 USD".parse().unwrap();

        assert_eq!(money, Money::from_minor(150_000, Currency::USD));
    }

    #[test]
    fn code_prefix_test() {
        let money: Money = "USD 1,500.00".parse().unwrap();

        assert_eq!(money, Money::from_minor(150_000, Currency::USD));
    }

    #[test]
    fn code_without_space_test() {
        assert_eq!(
            "1.50USD".parse::<Money>().unwrap(),
            Money::from_minor(150, Currency::USD)
        );
        assert_eq!(
            "USD1.50".parse::<Money>().unwrap(),
            Money::from_minor(150, Currency::USD)
        );
    }

    #[test]
    fn code_is_case_insensitive_test() {
        assert_eq!(
            "1.50 usd".parse::<Money>().unwrap(),
            Money::from_minor(150, Currency::USD)
        );
    }

    #[test]
    fn surrounding_whitespace_test() {
        assert_eq!(
            "  1.50 USD  ".parse::<Money>().unwrap(),
            Money::from_minor(150, Currency::USD)
        );
    }

    #[test]
    fn negative_minus_placements_test() {
        let expected = Money::from_minor(-150, Currency::USD);

        assert_eq!("-1.50 USD".parse::<Money>().unwrap(), expected);
        assert_eq!("-USD 1.50".parse::<Money>().unwrap(), expected);
        assert_eq!("USD -1.50".parse::<Money>().unwrap(), expected);
    }

    #[test]
    fn negative_parentheses_test() {
        assert_eq!(
            "(1,500.00 USD)".parse::<Money>().unwrap(),
            Money::from_minor(-150_000, Currency::USD)
        );
    }

    #[test]
    fn doubled_sign_is_invalid_test() {
        assert_eq!(
            "--1.50 USD".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: "--1.50 USD".to_string(),
                at: 1..2
            })
        );
        assert_eq!(
            "(-1.50 USD)".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: "(-1.50 USD)".to_string(),
                at: 1..2
            })
        );
    }

    #[test]
    fn missing_currency_test() {
        assert_eq!(
            "1.50".parse::<Money>(),
            Err(ParseMoneyError::MissingCurrency {
                text: "1.50".to_string(),
                at: 0..4
            })
        );
    }

    #[test]
    fn unknown_currency_test() {
        assert_eq!(
            "1.50 ZZZ".parse::<Money>(),
            Err(ParseMoneyError::UnknownCurrency {
                text: "1.50 ZZZ".to_string(),
                token: "ZZZ".to_string(),
                at: 5..8
            })
        );
    }

    #[test]
    fn conflicting_currencies_test() {
        assert_eq!(
            "EUR 1.50 USD".parse::<Money>(),
            Err(ParseMoneyError::ConflictingCurrencies {
                text: "EUR 1.50 USD".to_string(),
                first: 0..3,
                second: 9..12
            })
        );
    }

    #[test]
    fn symbol_agreeing_with_code_test() {
        assert_eq!(
            "$1.50 USD".parse::<Money>().unwrap(),
            Money::from_minor(150, Currency::USD)
        );
        assert_eq!(
            "€1.50 USD".parse::<Money>(),
            Err(ParseMoneyError::UnknownCurrency {
                text: "€1.50 USD".to_string(),
                token: "€".to_string(),
                at: 0..3
            })
        );
    }

    #[test]
    fn symbol_without_assumption_is_unknown_test() {
        assert_eq!(
            "$1.50".parse::<Money>(),
            Err(ParseMoneyError::UnknownCurrency {
                text: "$1.50".to_string(),
                token: "$".to_string(),
                at: 0..1
            })
        );
    }

    #[test]
    fn assumed_currency_test() {
        let parser = Parser::new().assume_currency(Currency::USD);

        assert_eq!(
            parser.parse("1.50").unwrap(),
            Money::from_minor(150, Currency::USD)
        );
        assert_eq!(
            parser.parse("$1.50").unwrap(),
            Money::from_minor(150, Currency::USD)
        );
        assert_eq!(
            parser.parse("$-1.50").unwrap(),
            Money::from_minor(-150, Currency::USD)
        );
    }

    #[test]
    fn code_overrides_assumed_currency_test() {
        let parser = Parser::new().assume_currency(Currency::USD);

        assert_eq!(
            parser.parse("1.50 EUR").unwrap(),
            Money::from_minor(150, Currency::EUR)
        );
    }

    #[test]
    fn wrong_symbol_for_assumed_currency_test() {
        let parser = Parser::new().assume_currency(Currency::EUR);

        assert_eq!(
            parser.parse("$1.50"),
            Err(ParseMoneyError::UnknownCurrency {
                text: "$1.50".to_string(),
                token: "$".to_string(),
                at: 0..1
            })
        );
    }

    #[test]
    fn separators_test() {
        let parser = Parser::new().separators('.', ',');

        assert_eq!(
            parser.parse("1.500,00 EUR").unwrap(),
            Money::from_minor(150_000, Currency::EUR)
        );
    }

    #[test]
    fn grouping_spacing_is_not_checked_test() {
        assert_eq!(
            "1,00,0.50 USD".parse::<Money>().unwrap(),
            Money::from_decimal(dec!(1000.50), Currency::USD)
        );
    }

    #[test]
    fn group_separator_in_fraction_is_invalid_test() {
        assert_eq!(
            "1.5,0 USD".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: "1.5,0 USD".to_string(),
                at: 3..4
            })
        );
    }

    #[test]
    fn second_decimal_mark_is_invalid_test() {
        assert_eq!(
            "1.5.0 USD".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: "1.5.0 USD".to_string(),
                at: 3..4
            })
        );
    }

    #[test]
    fn no_digits_is_invalid_test() {
        assert_eq!(
            "USD".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: "USD".to_string(),
                at: 0..3
            })
        );
        assert_eq!(
            "".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: String::new(),
                at: 0..0
            })
        );
    }

    #[test]
    fn amount_beyond_decimal_range_is_invalid_test() {
        assert_eq!(
            "99999999999999999999999999999999999999 USD".parse::<Money>(),
            Err(ParseMoneyError::InvalidAmount {
                text: "99999999999999999999999999999999999999 USD".to_string(),
                at: 0..38
            })
        );
    }

    #[test]
    fn diagnostic_labels_the_token_that_matched_nothing_test() {
        let error = "1.50 ZZZ".parse::<Money>().unwrap_err();
        let labels: Vec<_> = error.labels().unwrap().collect();

        assert!(error.source_code().is_some());
        assert_eq!(labels.len(), 1);
        assert_eq!(labels[0].offset(), 5);
        assert_eq!(labels[0].len(), 3);
        assert_eq!(labels[0].label(), Some("matches no currency"));
    }

    #[test]
    fn diagnostic_labels_both_conflicting_currencies_test() {
        let error = "EUR 1.50 USD".parse::<Money>().unwrap_err();
        let labels: Vec<_> = error.labels().unwrap().collect();

        assert_eq!(labels.len(), 2);
        assert_eq!((labels[0].offset(), labels[0].len()), (0, 3));
        assert_eq!((labels[1].offset(), labels[1].len()), (9, 3));
    }

    #[test]
    fn spans_count_from_the_untrimmed_start_test() {
        assert_eq!(
            "   1.50 ZZZ  ".parse::<Money>(),
            Err(ParseMoneyError::UnknownCurrency {
                text: "   1.50 ZZZ  ".to_string(),
                token: "ZZZ".to_string(),
                at: 8..11
            })
        );
    }

    #[test]
    fn digits_are_kept_verbatim_test() {
        let money: Money = "1.2345 USD".parse().unwrap();

        assert_eq!(money.amount(), dec!(1.2345));
    }

    #[test]
    fn zero_minor_digit_currency_test() {
        assert_eq!(
            "5 JPY".parse::<Money>().unwrap(),
            Money::from_major(5, Currency::JPY)
        );
    }

    #[test]
    fn round_trips_format_renderings_test() {
        let money = Money::from_minor(-1_234_567, Currency::USD);
        let parser = Parser::new().assume_currency(Currency::USD);

        for format in [
            Format::new(),
            Format::new().symbol(),
            Format::new().amount_only(),
            Format::new().prefix().no_space(),
            Format::new().symbol().parentheses(),
            Format::new().no_grouping(),
            Format::new().grouping(3, 2),
        ] {
            let rendered = money.format_with(format).to_string();

            assert_eq!(
                parser.parse(&rendered).unwrap(),
                money,
                "rendering {rendered:?}"
            );
        }
    }
}