katex-parser 0.1.0

A port of the KaTeX parser: lexing and parsing LaTeX math expressions with macro expansion into a typed AST, plus a Unicode rendering backend
Documentation 
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// Ported from moonbit inspect/unicode_operator_test.mbt
#![allow(unused_imports)]
use crate::parse;
use crate::settings::{Macros, Settings};
use crate::unicode::render;
use crate::unicode::{LineStyle, RenderConfig};
use std::collections::HashMap;

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn t0() {
        assert_eq!(render(&parse("\\det A", &mut Settings::new()).unwrap(), RenderConfig::new()), "det A");
        assert_eq!(render(&parse("\\sin x", &mut Settings::new()).unwrap(), RenderConfig::new()), "sin x");
        assert_eq!(render(&parse("\\lim f", &mut Settings::new()).unwrap(), RenderConfig::new()), "lim f");
        assert_eq!(render(&parse("\\det A_1", &mut Settings::new()).unwrap(), RenderConfig::new()), "det A₁");
        assert_eq!(render(&parse("\\det(x)", &mut Settings::new()).unwrap(), RenderConfig::new()), "det(x)");
        assert_eq!(render(&parse("\\det\\left(x\\right)", &mut Settings::new()).unwrap(), RenderConfig::new()), "det (x)");
    }

    #[test]
    fn t1() {
        let mut settings = Settings { display_mode: true, ..Settings::new() };
        assert_eq!(render(&parse("\\sum_{i=0}^n x", &mut settings).unwrap(), RenderConfig::new()), " n   \n ∑  x\ni=0  ");
        assert_eq!(render(&parse("\\lim_{x\\to 0} f", &mut settings).unwrap(), RenderConfig::new()), "lim f\nx→0  ");
        assert_eq!(render(&parse("\\int_0^1 x", &mut settings).unwrap(), RenderConfig::new()), "∫₀¹ x");
        assert_eq!(render(&parse("\\sum_{i=0}^n x", &mut Settings::new()).unwrap(), RenderConfig::new()), "∑ᵢ₌₀ⁿ x");
    }

    #[test]
    fn t2() {
        assert_eq!(render(&parse("\\operatorname*{argmin}_{x} f", &mut Settings::new()).unwrap(), RenderConfig::new()), "argmin f\n  x     ");
        assert_eq!(render(&parse("\\operatorname{argmin}_{x} f", &mut Settings::new()).unwrap(), RenderConfig::new()), "argminₓ f");
    }

    #[test]
    fn t3() {
        assert_eq!(render(&parse("\\sin", &mut Settings::new()).unwrap(), RenderConfig::new()), "sin");
        assert_eq!(render(&parse("\\lim_{x}", &mut Settings::new()).unwrap(), RenderConfig::new()), "limₓ");
        assert_eq!(render(&parse("\\det A", &mut Settings::new()).unwrap(), RenderConfig::new()), "det A");
        assert_eq!(render(&parse("\\widehat{\\overrightarrow{x}}", &mut Settings::new()).unwrap(), RenderConfig::new()), "widehat(overrightarrow(x))");
        assert_eq!(render(&parse("\\hat{\\cancel{x}}", &mut Settings::new()).unwrap(), RenderConfig::new()), "hat(cancel(x))");
        assert_eq!(render(&parse("\\underleftrightarrow{x}", &mut Settings::new()).unwrap(), RenderConfig::new()), "underaccent(underleftrightarrow,x)");
    }

}