825 lines
21 KiB
Rust
825 lines
21 KiB
Rust
use crate::units::{NonMetric, NonMetricQuantity};
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enum Expect {
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Number,
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Unit,
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}
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#[derive(Debug, PartialEq)]
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pub enum ParseError {
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NotValidNumber(String),
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UnexpectedUnit(String),
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UnknownUnit(String),
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ExpectedUnit,
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AmbiguousUnit(String, &'static str, &'static str),
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}
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pub fn parse(input: &str) -> Result<Vec<NonMetricQuantity>, ParseError> {
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let mut quantities = Vec::new();
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let mut state = Expect::Number;
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let mut amount = None;
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for token in tokenize(input) {
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match (&state, token) {
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(Expect::Number, Token::Number(number)) => {
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let number = parse_number(number)?;
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amount = Some(number);
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state = Expect::Unit;
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}
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(Expect::Number, Token::Unit(unit)) => {
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return Err(ParseError::UnexpectedUnit(unit));
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}
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(Expect::Unit, Token::Number(_)) => {
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unreachable!("token stream can't contain two numbers in a row");
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}
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(Expect::Unit, Token::Unit(unit)) => {
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let unit = parse_unit(unit)?;
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let quantity = NonMetricQuantity {
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amount: amount.take().expect("must have read a number to be in this state"),
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unit: unit,
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};
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quantities.push(quantity);
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state = Expect::Number;
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}
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}
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}
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match state {
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Expect::Number => {}
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Expect::Unit => {
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return Err(ParseError::ExpectedUnit);
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}
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}
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Ok(quantities)
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}
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fn parse_number(input: String) -> Result<f64, ParseError> {
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let no_whitespace: String = input.chars().filter(|c| !c.is_whitespace()).collect();
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no_whitespace.parse().or_else(|_| Err(ParseError::NotValidNumber(input)))
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}
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fn parse_unit(input: String) -> Result<NonMetric, ParseError> {
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match input.as_str() {
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// Length
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"inch" => Ok(NonMetric::Inch),
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"inches" => Ok(NonMetric::Inch),
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"in" => Ok(NonMetric::Inch),
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"\"" => Ok(NonMetric::Inch),
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"″" => Ok(NonMetric::Inch),
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"foot" => Ok(NonMetric::Foot),
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"feet" => Ok(NonMetric::Foot),
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"ft" => Ok(NonMetric::Foot),
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"'" => Ok(NonMetric::Foot),
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"′" => Ok(NonMetric::Foot),
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"yard" => Ok(NonMetric::Yard),
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"yards" => Ok(NonMetric::Yard),
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"yd" => Ok(NonMetric::Yard),
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"mile" => Ok(NonMetric::Mile),
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"miles" => Ok(NonMetric::Mile),
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"mi" => Ok(NonMetric::Mile),
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"m" => Ok(NonMetric::Mile),
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// Weight
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"ounce" => Ok(NonMetric::Ounce),
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"ounces" => Ok(NonMetric::Ounce),
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"oz" => Ok(NonMetric::Ounce),
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"pound" => Ok(NonMetric::Pound),
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"pounds" => Ok(NonMetric::Pound),
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"lb" => Ok(NonMetric::Pound),
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"lbs" => Ok(NonMetric::Pound),
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"#" => Ok(NonMetric::Pound),
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"stone" => Ok(NonMetric::Stone),
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"stones" => Ok(NonMetric::Stone),
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"st" => Ok(NonMetric::Stone),
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// Temperature
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"degree Fahrenheit" => Ok(NonMetric::Fahrenheit),
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"degrees Fahrenheit" => Ok(NonMetric::Fahrenheit),
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"degree fahrenheit" => Ok(NonMetric::Fahrenheit),
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"degrees fahrenheit" => Ok(NonMetric::Fahrenheit),
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"Fahrenheit" => Ok(NonMetric::Fahrenheit),
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"fahrenheit" => Ok(NonMetric::Fahrenheit),
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"°F" => Ok(NonMetric::Fahrenheit),
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"F" => Ok(NonMetric::Fahrenheit),
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// Area
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"square inch" => Ok(NonMetric::SquareInch),
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"square inches" => Ok(NonMetric::SquareInch),
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"square in" => Ok(NonMetric::SquareInch),
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"sq inch" => Ok(NonMetric::SquareInch),
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"sq inches" => Ok(NonMetric::SquareInch),
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"sq in" => Ok(NonMetric::SquareInch),
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"inch²" => Ok(NonMetric::SquareInch),
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"inches²" => Ok(NonMetric::SquareInch),
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"in²" => Ok(NonMetric::SquareInch),
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"\"²" => Ok(NonMetric::SquareInch),
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"″²" => Ok(NonMetric::SquareInch),
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"inch^2" => Ok(NonMetric::SquareInch),
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"inches^2" => Ok(NonMetric::SquareInch),
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"in^2" => Ok(NonMetric::SquareInch),
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"\"^2" => Ok(NonMetric::SquareInch),
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"square foot" => Ok(NonMetric::SquareFoot),
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"square feet" => Ok(NonMetric::SquareFoot),
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"square ft" => Ok(NonMetric::SquareFoot),
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"sq foot" => Ok(NonMetric::SquareFoot),
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"sq feet" => Ok(NonMetric::SquareFoot),
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"sq ft" => Ok(NonMetric::SquareFoot),
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"foot²" => Ok(NonMetric::SquareFoot),
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"feet²" => Ok(NonMetric::SquareFoot),
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"ft²" => Ok(NonMetric::SquareFoot),
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"'²" => Ok(NonMetric::SquareFoot),
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"′²" => Ok(NonMetric::SquareFoot),
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"foot^2" => Ok(NonMetric::SquareFoot),
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"feet^2" => Ok(NonMetric::SquareFoot),
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"ft^2" => Ok(NonMetric::SquareFoot),
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"'^2" => Ok(NonMetric::SquareFoot),
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"sf" => Ok(NonMetric::SquareFoot),
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"acre" => Ok(NonMetric::Acre),
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"acres" => Ok(NonMetric::Acre),
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"ac" => Ok(NonMetric::Acre),
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"square mile" => Ok(NonMetric::SquareMile),
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"square miles" => Ok(NonMetric::SquareMile),
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"square mi" => Ok(NonMetric::SquareMile),
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"sq mile" => Ok(NonMetric::SquareMile),
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"sq miles" => Ok(NonMetric::SquareMile),
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"sq mi" => Ok(NonMetric::SquareMile),
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"mile²" => Ok(NonMetric::SquareMile),
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"miles²" => Ok(NonMetric::SquareMile),
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"mi²" => Ok(NonMetric::SquareMile),
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"mile^2" => Ok(NonMetric::SquareMile),
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"miles^2" => Ok(NonMetric::SquareMile),
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"mi^2" => Ok(NonMetric::SquareMile),
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// Volume
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"cubic inch" => Ok(NonMetric::CubicInch),
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"cubic inches" => Ok(NonMetric::CubicInch),
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"cubic in" => Ok(NonMetric::CubicInch),
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"cu inch" => Ok(NonMetric::CubicInch),
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"cu inches" => Ok(NonMetric::CubicInch),
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"cu in" => Ok(NonMetric::CubicInch),
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"inch³" => Ok(NonMetric::CubicInch),
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"inches³" => Ok(NonMetric::CubicInch),
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"in³" => Ok(NonMetric::CubicInch),
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"inch^3" => Ok(NonMetric::CubicInch),
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"inches^3" => Ok(NonMetric::CubicInch),
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"in^3" => Ok(NonMetric::CubicInch),
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"cubic foot" => Ok(NonMetric::CubicFoot),
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"cubic feet" => Ok(NonMetric::CubicFoot),
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"cubic ft" => Ok(NonMetric::CubicFoot),
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"cu foot" => Ok(NonMetric::CubicFoot),
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"cu feet" => Ok(NonMetric::CubicFoot),
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"cu ft" => Ok(NonMetric::CubicFoot),
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"foot³" => Ok(NonMetric::CubicFoot),
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"feet³" => Ok(NonMetric::CubicFoot),
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"ft³" => Ok(NonMetric::CubicFoot),
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"foot^3" => Ok(NonMetric::CubicFoot),
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"feet^3" => Ok(NonMetric::CubicFoot),
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"ft^3" => Ok(NonMetric::CubicFoot),
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// Fluid volume
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"imperial fluid ounce" => Ok(NonMetric::ImperialFluidOunce),
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"imperial fluid ounces" => Ok(NonMetric::ImperialFluidOunce),
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"imp fl oz" => Ok(NonMetric::ImperialFluidOunce),
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"imp fl. oz." => Ok(NonMetric::ImperialFluidOunce),
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"imp oz. fl." => Ok(NonMetric::ImperialFluidOunce),
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"imperial pint" => Ok(NonMetric::ImperialPint),
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"imperial pints" => Ok(NonMetric::ImperialPint),
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"imp pt" => Ok(NonMetric::ImperialPint),
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"imp p" => Ok(NonMetric::ImperialPint),
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"imperial quart" => Ok(NonMetric::ImperialQuart),
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"imperial quarts" => Ok(NonMetric::ImperialQuart),
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"imp qt" => Ok(NonMetric::ImperialQuart),
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"imperial gallon" => Ok(NonMetric::ImperialGallon),
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"imperial gallons" => Ok(NonMetric::ImperialGallon),
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"imp gal" => Ok(NonMetric::ImperialGallon),
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"US teaspoon" => Ok(NonMetric::USTeaspoon),
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"US teaspoons" => Ok(NonMetric::USTeaspoon),
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"US tsp." => Ok(NonMetric::USTeaspoon),
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"US tsp" => Ok(NonMetric::USTeaspoon),
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"us teaspoon" => Ok(NonMetric::USTeaspoon),
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"us teaspoons" => Ok(NonMetric::USTeaspoon),
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"us tsp." => Ok(NonMetric::USTeaspoon),
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"us tsp" => Ok(NonMetric::USTeaspoon),
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"teaspoon" => Ok(NonMetric::USTeaspoon),
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"teaspoons" => Ok(NonMetric::USTeaspoon),
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"tsp." => Ok(NonMetric::USTeaspoon),
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"tsp" => Ok(NonMetric::USTeaspoon),
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"US tablespoon" => Ok(NonMetric::USTablespoon),
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"US tablespoons" => Ok(NonMetric::USTablespoon),
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"US Tbsp." => Ok(NonMetric::USTablespoon),
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"US Tbsp" => Ok(NonMetric::USTablespoon),
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"us tablespoon" => Ok(NonMetric::USTablespoon),
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"us tablespoons" => Ok(NonMetric::USTablespoon),
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"us tbsp." => Ok(NonMetric::USTablespoon),
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"us tbsp" => Ok(NonMetric::USTablespoon),
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"tablespoon" => Ok(NonMetric::USTablespoon),
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"tablespoons" => Ok(NonMetric::USTablespoon),
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"Tbsp." => Ok(NonMetric::USTablespoon),
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"Tbsp" => Ok(NonMetric::USTablespoon),
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"tbsp." => Ok(NonMetric::USTablespoon),
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"tbsp" => Ok(NonMetric::USTablespoon),
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"US fluid ounce" => Ok(NonMetric::USFluidOunce),
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"US fluid ounces" => Ok(NonMetric::USFluidOunce),
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"US fl oz" => Ok(NonMetric::USFluidOunce),
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"US fl. oz." => Ok(NonMetric::USFluidOunce),
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"US oz. fl." => Ok(NonMetric::USFluidOunce),
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"us fluid ounce" => Ok(NonMetric::USFluidOunce),
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"us fluid ounces" => Ok(NonMetric::USFluidOunce),
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"us fl oz" => Ok(NonMetric::USFluidOunce),
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"us fl. oz." => Ok(NonMetric::USFluidOunce),
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"us oz. fl." => Ok(NonMetric::USFluidOunce),
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"US cup" => Ok(NonMetric::USCup),
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"US cups" => Ok(NonMetric::USCup),
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"us cup" => Ok(NonMetric::USCup),
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"us cups" => Ok(NonMetric::USCup),
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"US liquid pint" => Ok(NonMetric::USLiquidPint),
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"US liquid pints" => Ok(NonMetric::USLiquidPint),
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"US pint" => Ok(NonMetric::USLiquidPint),
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"US pints" => Ok(NonMetric::USLiquidPint),
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"US pt" => Ok(NonMetric::USLiquidPint),
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"US p" => Ok(NonMetric::USLiquidPint),
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"us liquid pint" => Ok(NonMetric::USLiquidPint),
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"us liquid pints" => Ok(NonMetric::USLiquidPint),
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"us pint" => Ok(NonMetric::USLiquidPint),
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"us pints" => Ok(NonMetric::USLiquidPint),
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"us pt" => Ok(NonMetric::USLiquidPint),
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"us p" => Ok(NonMetric::USLiquidPint),
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"US liquid quart" => Ok(NonMetric::USLiquidQuart),
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"US liquid quarts" => Ok(NonMetric::USLiquidQuart),
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"US quart" => Ok(NonMetric::USLiquidQuart),
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"US quarts" => Ok(NonMetric::USLiquidQuart),
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"US qt" => Ok(NonMetric::USLiquidQuart),
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"us liquid quart" => Ok(NonMetric::USLiquidQuart),
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"us liquid quarts" => Ok(NonMetric::USLiquidQuart),
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"us quart" => Ok(NonMetric::USLiquidQuart),
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"us quarts" => Ok(NonMetric::USLiquidQuart),
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"us qt" => Ok(NonMetric::USLiquidQuart),
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"US gallon" => Ok(NonMetric::USGallon),
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"US gallons" => Ok(NonMetric::USGallon),
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"US gal" => Ok(NonMetric::USGallon),
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"us gallon" => Ok(NonMetric::USGallon),
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"us gallons" => Ok(NonMetric::USGallon),
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"us gal" => Ok(NonMetric::USGallon),
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// Ambiguous units
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"fluid ounce" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"fluid ounces" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"fl oz" => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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"fl. oz." => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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"oz. fl." => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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"pint" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"pints" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"pt" => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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"p" => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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"quart" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"quarts" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"qt" => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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"gallon" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"gallons" => Err(ParseError::AmbiguousUnit(input, "imperial", "US")),
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"gal" => Err(ParseError::AmbiguousUnit(input, "imp", "US")),
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// Unknown unit
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_ => Err(ParseError::UnknownUnit(input)),
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}
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}
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#[derive(Debug, PartialEq)]
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enum Token {
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Number(String),
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Unit(String),
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}
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enum TokState {
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Neutral,
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Number,
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Unit(bool),
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}
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fn tokenize(input: &str) -> Vec<Token> {
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let mut tokens = Vec::new();
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let mut token = String::new();
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let mut state = TokState::Neutral;
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for c in input.chars() {
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match state {
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TokState::Neutral => {
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if c.is_ascii_digit() || c == '-' {
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token.push(c);
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state = TokState::Number;
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} else if !c.is_whitespace() {
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token.push(c);
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state = TokState::Unit(false);
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}
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}
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TokState::Number => {
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if c.is_ascii_digit() ||
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c.is_whitespace() ||
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c == '.' {
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token.push(c);
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} else {
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tokens.push(Token::Number(token.trim().to_string()));
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state = TokState::Unit(false);
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token = String::new();
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token.push(c);
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}
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}
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TokState::Unit(after_caret) => {
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if !after_caret && (c.is_ascii_digit() || c == '-') {
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tokens.push(Token::Unit(token.trim().to_string()));
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state = TokState::Number;
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token = String::new();
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token.push(c);
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} else if c == '^' {
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token.push(c);
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state = TokState::Unit(true);
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} else if c.is_whitespace() {
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token.push(c);
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state = TokState::Unit(false);
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} else {
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token.push(c);
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}
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}
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}
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}
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match state {
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TokState::Neutral => { assert!(token.len() == 0); }
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TokState::Number => { tokens.push(Token::Number(token.trim().to_string())); }
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TokState::Unit(_) => { tokens.push(Token::Unit(token.trim().to_string())); }
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}
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tokens
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn parsing() {
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assert_eq!(parse(""), Ok(vec![]));
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assert_eq!(parse("5 ft"), Ok(vec![
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NonMetricQuantity { amount: 5.0, unit: NonMetric::Foot },
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]));
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assert_eq!(parse("5 ft 8 in"), Ok(vec![
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NonMetricQuantity { amount: 5.0, unit: NonMetric::Foot },
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NonMetricQuantity { amount: 8.0, unit: NonMetric::Inch },
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]));
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assert_eq!(parse("20 000 lbs"), Ok(vec![
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NonMetricQuantity { amount: 20_000.0, unit: NonMetric::Pound },
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]));
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assert_eq!(parse("12.0."), Err(ParseError::NotValidNumber("12.0.".to_string())));
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assert_eq!(parse("ft"), Err(ParseError::UnexpectedUnit("ft".to_string())));
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assert_eq!(parse("5 tf"), Err(ParseError::UnknownUnit("tf".to_string())));
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assert_eq!(parse("12"), Err(ParseError::ExpectedUnit));
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assert_eq!(parse("1 gallon"), Err(ParseError::AmbiguousUnit("gallon".to_string(), "imperial", "US")));
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}
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#[test]
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fn numbers() {
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assert_eq!(parse_number("".to_string()), Err(ParseError::NotValidNumber("".to_string())));
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assert_eq!(parse_number("1".to_string()), Ok(1.0));
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assert_eq!(parse_number("1.0".to_string()), Ok(1.0));
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assert_eq!(parse_number("0.1".to_string()), Ok(0.1));
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assert_eq!(parse_number("0.1.".to_string()), Err(ParseError::NotValidNumber("0.1.".to_string())));
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assert_eq!(parse_number("-10".to_string()), Ok(-10.0));
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assert_eq!(parse_number("10\t00\u{1680}000".to_string()), Ok(10_00_000.0));
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}
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#[test]
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fn units() {
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// Length
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test_units(NonMetric::Inch, &[
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"inch",
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"inches",
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"in",
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"\"",
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"″",
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]);
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test_units(NonMetric::Foot, &[
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"foot",
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"feet",
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"ft",
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"'",
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"′",
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]);
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test_units(NonMetric::Yard, &[
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"yard",
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"yards",
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"yd",
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]);
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test_units(NonMetric::Mile, &[
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"mile",
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"miles",
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"mi",
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"m",
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]);
|
||
|
||
// Weight
|
||
test_units(NonMetric::Ounce, &[
|
||
"ounce",
|
||
"ounces",
|
||
"oz",
|
||
]);
|
||
|
||
test_units(NonMetric::Pound, &[
|
||
"pound",
|
||
"pounds",
|
||
"lb",
|
||
"lbs",
|
||
"#",
|
||
]);
|
||
|
||
test_units(NonMetric::Stone, &[
|
||
"stone",
|
||
"stones",
|
||
"st",
|
||
]);
|
||
|
||
// Temperature
|
||
test_units(NonMetric::Fahrenheit, &[
|
||
"degree Fahrenheit",
|
||
"degrees Fahrenheit",
|
||
"degree fahrenheit",
|
||
"degrees fahrenheit",
|
||
"Fahrenheit",
|
||
"fahrenheit",
|
||
"°F",
|
||
"F",
|
||
]);
|
||
|
||
// Area
|
||
test_units(NonMetric::SquareInch, &[
|
||
"square inch",
|
||
"square inches",
|
||
"square in",
|
||
"sq inch",
|
||
"sq inches",
|
||
"sq in",
|
||
"inch²",
|
||
"inches²",
|
||
"in²",
|
||
"\"²",
|
||
"″²",
|
||
"inch^2",
|
||
"inches^2",
|
||
"in^2",
|
||
"\"^2",
|
||
]);
|
||
|
||
test_units(NonMetric::SquareFoot, &[
|
||
"square foot",
|
||
"square feet",
|
||
"square ft",
|
||
"sq foot",
|
||
"sq feet",
|
||
"sq ft",
|
||
"foot²",
|
||
"feet²",
|
||
"ft²",
|
||
"'²",
|
||
"′²",
|
||
"foot^2",
|
||
"feet^2",
|
||
"ft^2",
|
||
"'^2",
|
||
"sf",
|
||
]);
|
||
|
||
test_units(NonMetric::Acre, &[
|
||
"acre",
|
||
"acres",
|
||
"ac",
|
||
]);
|
||
|
||
test_units(NonMetric::SquareMile, &[
|
||
"square mile",
|
||
"square miles",
|
||
"square mi",
|
||
"sq mile",
|
||
"sq miles",
|
||
"sq mi",
|
||
"mile²",
|
||
"miles²",
|
||
"mi²",
|
||
"mile^2",
|
||
"miles^2",
|
||
"mi^2",
|
||
]);
|
||
|
||
// Volume
|
||
test_units(NonMetric::CubicInch, &[
|
||
"cubic inch",
|
||
"cubic inches",
|
||
"cubic in",
|
||
"cu inch",
|
||
"cu inches",
|
||
"cu in",
|
||
"inch³",
|
||
"inches³",
|
||
"in³",
|
||
"inch^3",
|
||
"inches^3",
|
||
"in^3",
|
||
]);
|
||
|
||
test_units(NonMetric::CubicFoot, &[
|
||
"cubic foot",
|
||
"cubic feet",
|
||
"cubic ft",
|
||
"cu foot",
|
||
"cu feet",
|
||
"cu ft",
|
||
"foot³",
|
||
"feet³",
|
||
"ft³",
|
||
"foot^3",
|
||
"feet^3",
|
||
"ft^3",
|
||
]);
|
||
|
||
// Fluid volume
|
||
test_units(NonMetric::ImperialFluidOunce, &[
|
||
"imperial fluid ounce",
|
||
"imperial fluid ounces",
|
||
"imp fl oz",
|
||
"imp fl. oz.",
|
||
"imp oz. fl.",
|
||
]);
|
||
|
||
test_units(NonMetric::ImperialPint, &[
|
||
"imperial pint",
|
||
"imperial pints",
|
||
"imp pt",
|
||
"imp p",
|
||
]);
|
||
|
||
test_units(NonMetric::ImperialQuart, &[
|
||
"imperial quart",
|
||
"imperial quarts",
|
||
"imp qt",
|
||
]);
|
||
|
||
test_units(NonMetric::ImperialGallon, &[
|
||
"imperial gallon",
|
||
"imperial gallons",
|
||
"imp gal",
|
||
]);
|
||
|
||
test_units(NonMetric::USTeaspoon, &[
|
||
"US teaspoon",
|
||
"US teaspoons",
|
||
"US tsp.",
|
||
"US tsp",
|
||
"us teaspoon",
|
||
"us teaspoons",
|
||
"us tsp.",
|
||
"us tsp",
|
||
"teaspoon",
|
||
"teaspoons",
|
||
"tsp.",
|
||
"tsp",
|
||
]);
|
||
|
||
test_units(NonMetric::USTablespoon, &[
|
||
"US tablespoon",
|
||
"US tablespoons",
|
||
"US Tbsp.",
|
||
"US Tbsp",
|
||
"us tablespoon",
|
||
"us tablespoons",
|
||
"us tbsp.",
|
||
"us tbsp",
|
||
"tablespoon",
|
||
"tablespoons",
|
||
"Tbsp.",
|
||
"Tbsp",
|
||
"tbsp.",
|
||
"tbsp",
|
||
]);
|
||
|
||
test_units(NonMetric::USFluidOunce, &[
|
||
"US fluid ounce",
|
||
"US fluid ounces",
|
||
"US fl oz",
|
||
"US fl. oz.",
|
||
"US oz. fl.",
|
||
"us fluid ounce",
|
||
"us fluid ounces",
|
||
"us fl oz",
|
||
"us fl. oz.",
|
||
"us oz. fl.",
|
||
]);
|
||
|
||
test_units(NonMetric::USCup, &[
|
||
"US cup",
|
||
"US cups",
|
||
"us cup",
|
||
"us cups",
|
||
]);
|
||
|
||
test_units(NonMetric::USLiquidPint, &[
|
||
"US liquid pint",
|
||
"US liquid pints",
|
||
"US pint",
|
||
"US pints",
|
||
"US pt",
|
||
"US p",
|
||
"us liquid pint",
|
||
"us liquid pints",
|
||
"us pint",
|
||
"us pints",
|
||
"us pt",
|
||
"us p",
|
||
]);
|
||
|
||
test_units(NonMetric::USLiquidQuart, &[
|
||
"US liquid quart",
|
||
"US liquid quarts",
|
||
"US quart",
|
||
"US quarts",
|
||
"US qt",
|
||
"us liquid quart",
|
||
"us liquid quarts",
|
||
"us quart",
|
||
"us quarts",
|
||
"us qt",
|
||
]);
|
||
|
||
test_units(NonMetric::USGallon, &[
|
||
"US gallon",
|
||
"US gallons",
|
||
"US gal",
|
||
"us gallon",
|
||
"us gallons",
|
||
"us gal",
|
||
]);
|
||
}
|
||
|
||
fn test_units(unit: NonMetric, spellings: &[&str]) {
|
||
for spelling in spellings {
|
||
assert_eq!(parse_unit(spelling.to_string()), Ok(unit));
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn ambiguous_units() {
|
||
test_ambiguous_units(NonMetric::ImperialFluidOunce, NonMetric::USFluidOunce, &[
|
||
"fluid ounce",
|
||
"fluid ounces",
|
||
"fl oz",
|
||
"fl. oz.",
|
||
"oz. fl.",
|
||
]);
|
||
|
||
test_ambiguous_units(NonMetric::ImperialPint, NonMetric::USLiquidPint, &[
|
||
"pint",
|
||
"pints",
|
||
"pt",
|
||
"p",
|
||
]);
|
||
|
||
test_ambiguous_units(NonMetric::ImperialQuart, NonMetric::USLiquidQuart, &[
|
||
"quart",
|
||
"quarts",
|
||
"qt",
|
||
]);
|
||
|
||
test_ambiguous_units(NonMetric::ImperialGallon, NonMetric::USGallon, &[
|
||
"gallon",
|
||
"gallons",
|
||
"gal",
|
||
]);
|
||
}
|
||
|
||
fn test_ambiguous_units(unit1: NonMetric, unit2: NonMetric, spellings: &[&str]) {
|
||
for spelling in spellings {
|
||
let parsed = parse_unit(spelling.to_string());
|
||
if let Err(ParseError::AmbiguousUnit(unit_name, prefix1, prefix2)) = parsed {
|
||
assert_eq!(&unit_name, spelling);
|
||
let suggestion1 = format!("{prefix1} {unit_name}");
|
||
let suggestion2 = format!("{prefix2} {unit_name}");
|
||
assert_eq!(parse_unit(suggestion1), Ok(unit1));
|
||
assert_eq!(parse_unit(suggestion2), Ok(unit2));
|
||
} else {
|
||
panic!("units passed to test_ambiguous_units() must be ambiguous");
|
||
}
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn unknown_unit() {
|
||
assert_eq!(parse_unit("hutenosa".to_string()), Err(ParseError::UnknownUnit("hutenosa".to_string())));
|
||
}
|
||
|
||
#[test]
|
||
fn tokens() {
|
||
assert_eq!(tokenize(""), vec![]);
|
||
assert_eq!(tokenize("10"), vec![Token::Number("10".to_string())]);
|
||
assert_eq!(tokenize(" 10 "), vec![Token::Number("10".to_string())]);
|
||
assert_eq!(tokenize("10 000"), vec![Token::Number("10 000".to_string())]);
|
||
assert_eq!(tokenize("10\t000"), vec![Token::Number("10\t000".to_string())]);
|
||
assert_eq!(tokenize("10\u{1680}000"), vec![Token::Number("10\u{1680}000".to_string())]);
|
||
assert_eq!(tokenize("10.0.1"), vec![Token::Number("10.0.1".to_string())]);
|
||
assert_eq!(tokenize("ft"), vec![Token::Unit("ft".to_string())]);
|
||
assert_eq!(
|
||
tokenize("10 ft"),
|
||
vec![
|
||
Token::Number("10".to_string()),
|
||
Token::Unit("ft".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("5 ft 7 in"),
|
||
vec![
|
||
Token::Number("5".to_string()),
|
||
Token::Unit("ft".to_string()),
|
||
Token::Number("7".to_string()),
|
||
Token::Unit("in".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("5\"7'"),
|
||
vec![
|
||
Token::Number("5".to_string()),
|
||
Token::Unit("\"".to_string()),
|
||
Token::Number("7".to_string()),
|
||
Token::Unit("'".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize(" 2.2lbs "),
|
||
vec![
|
||
Token::Number("2.2".to_string()),
|
||
Token::Unit("lbs".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("sq ft"),
|
||
vec![
|
||
Token::Unit("sq ft".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("sq ft2"),
|
||
vec![
|
||
Token::Unit("sq ft".to_string()),
|
||
Token::Number("2".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("ft^2"),
|
||
vec![
|
||
Token::Unit("ft^2".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("ft^22"),
|
||
vec![
|
||
Token::Unit("ft^22".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("ft^2 2"),
|
||
vec![
|
||
Token::Unit("ft^2".to_string()),
|
||
Token::Number("2".to_string()),
|
||
]
|
||
);
|
||
assert_eq!(
|
||
tokenize("ft^2 s^-1 lb 2"),
|
||
vec![
|
||
Token::Unit("ft^2 s^-1 lb".to_string()),
|
||
Token::Number("2".to_string()),
|
||
]
|
||
);
|
||
}
|
||
}
|