mdx_expression_text.rs

mod test_utils;
use markdown::{
    mdast::{Blockquote, MdxTextExpression, Node, Paragraph, Root, Text},
    message, to_html_with_options, to_mdast,
    unist::Position,
    Constructs, Options, ParseOptions,
};
use pretty_assertions::assert_eq;
use test_utils::swc::{parse_esm, parse_expression};

/// Note: these tests are also in `micromark/micromark-extension-mdx-expression`
/// at `tests/index.js`.
#[test]
fn mdx_expression() -> Result<(), message::Message> {
    let swc = Options {
        parse: ParseOptions {
            constructs: Constructs::mdx(),
            mdx_esm_parse: Some(Box::new(parse_esm)),
            mdx_expression_parse: Some(Box::new(parse_expression)),
            ..Default::default()
        },
        ..Default::default()
    };

    assert_eq!(
        to_html_with_options("a {} b", &swc)?,
        "<p>a  b</p>",
        "should support an empty expression (1)"
    );

    assert_eq!(
        to_html_with_options("a { \t\r\n} b", &swc)?,
        "<p>a  b</p>",
        "should support an empty expression (2)"
    );

    assert_eq!(
        to_html_with_options("a {/**/} b", &swc)?,
        "<p>a  b</p>",
        "should support a multiline comment (1)"
    );

    assert_eq!(
        to_html_with_options("a {  /*\n*/\t} b", &swc)?,
        "<p>a  b</p>",
        "should support a multiline comment (2)"
    );

    assert_eq!(
        to_html_with_options("a {/*b*//*c*/} d", &swc)?,
        "<p>a  d</p>",
        "should support a multiline comment (3)"
    );

    assert_eq!(
        to_html_with_options("a {b/*c*/} d", &swc)?,
        "<p>a  d</p>",
        "should support a multiline comment (4)"
    );

    assert_eq!(
        to_html_with_options("a {/*b*/c} d", &swc)?,
        "<p>a  d</p>",
        "should support a multiline comment (5)"
    );

    assert_eq!(
        to_html_with_options("a {//} b", &swc)
            .err()
            .unwrap()
            .to_string(),
        "1:9: Could not parse expression with swc: Unexpected eof (mdx:swc)",
        "should crash on an incorrect line comment (1)"
    );

    assert_eq!(
        to_html_with_options("a { // b } c", &swc)
            .err()
            .unwrap()
            .to_string(),
        "1:13: Could not parse expression with swc: Unexpected eof (mdx:swc)",
        "should crash on an incorrect line comment (2)"
    );

    assert_eq!(
        to_html_with_options("a {//\n} b", &swc)?,
        "<p>a  b</p>",
        "should support a line comment followed by a line ending"
    );

    assert_eq!(
        to_html_with_options("a {// b\nc} d", &swc)?,
        "<p>a  d</p>",
        "should support a line comment followed by a line ending and an expression"
    );

    assert_eq!(
        to_html_with_options("a {b// c\n} d", &swc)?,
        "<p>a  d</p>",
        "should support an expression followed by a line comment and a line ending"
    );

    assert_eq!(
        to_html_with_options("a {/*b*/ // c\n} d", &swc)?,
        "<p>a  d</p>",
        "should support comments"
    );

    assert_eq!(
        to_html_with_options("a {b.c} d", &swc)?,
        "<p>a  d</p>",
        "should support expression statements (1)"
    );

    assert_eq!(
        to_html_with_options("a {1 + 1} b", &swc)?,
        "<p>a  b</p>",
        "should support expression statements (2)"
    );

    assert_eq!(
        to_html_with_options("a {function () {}} b", &swc)?,
        "<p>a  b</p>",
        "should support expression statements (3)"
    );

    assert_eq!(
        to_html_with_options("a {var b = \"c\"} d", &swc)
            .err()
            .unwrap()
            .to_string(),
        "1:4: Could not parse expression with swc: Expression expected (mdx:swc)",
        "should crash on non-expressions"
    );

    assert_eq!(
        to_html_with_options("> a {\n> b} c", &swc)?,
        "<blockquote>\n<p>a  c</p>\n</blockquote>",
        "should support expressions in containers"
    );

    assert_eq!(
        to_html_with_options("> a {\n> b<} c", &swc)
            .err()
            .unwrap()
            .to_string(),
        "2:8: Could not parse expression with swc: Expression expected (mdx:swc)",
        "should crash on incorrect expressions in containers (1)"
    );

    assert_eq!(
        to_html_with_options("> a {\n> b\n> c} d", &swc)
            .err()
            .unwrap()
            .to_string(),
        "3:7: Could not parse expression with swc: Unexpected content after expression (mdx:swc)",
        "should crash on incorrect expressions in containers (2)"
    );

    Ok(())
}

/// Note: these tests are also in `micromark/micromark-extension-mdx-expression`
/// at `tests/index.js`.
#[test]
fn mdx_expression_text_agnostic() -> Result<(), message::Message> {
    let mdx = Options {
        parse: ParseOptions::mdx(),
        ..Default::default()
    };

    assert_eq!(
        to_html_with_options("a {b} c", &mdx)?,
        "<p>a  c</p>",
        "should support an expression"
    );

    assert_eq!(
        to_html_with_options("a {} b", &mdx)?,
        "<p>a  b</p>",
        "should support an empty expression"
    );

    assert_eq!(
        to_html_with_options("a {b c", &mdx)
            .err()
            .unwrap()
            .to_string(),
        "1:7: Unexpected end of file in expression, expected a corresponding closing brace for `{` (markdown-rs:unexpected-eof)",
        "should crash if no closing brace is found (1)"
    );

    assert_eq!(
        to_html_with_options("a {b { c } d", &mdx)
            .err()
            .unwrap().to_string(),
        "1:13: Unexpected end of file in expression, expected a corresponding closing brace for `{` (markdown-rs:unexpected-eof)",
        "should crash if no closing brace is found (2)"
    );

    assert_eq!(
        to_html_with_options("a {\n} b", &mdx)?,
        "<p>a  b</p>",
        "should support a line ending in an expression"
    );

    assert_eq!(
        to_html_with_options("a } b", &mdx)?,
        "<p>a } b</p>",
        "should support just a closing brace"
    );

    assert_eq!(
        to_html_with_options("{ a } b", &mdx)?,
        "<p> b</p>",
        "should support expressions as the first thing when following by other things"
    );

    assert_eq!(
        to_mdast("a {alpha} b.", &mdx.parse)?,
        Node::Root(Root {
            children: vec![Node::Paragraph(Paragraph {
                children: vec![
                    Node::Text(Text {
                        value: "a ".into(),
                        position: Some(Position::new(1, 1, 0, 1, 3, 2))
                    }),
                    Node::MdxTextExpression(MdxTextExpression {
                        value: "alpha".into(),
                        position: Some(Position::new(1, 3, 2, 1, 10, 9)),
                        stops: vec![(0, 3)]
                    }),
                    Node::Text(Text {
                        value: " b.".into(),
                        position: Some(Position::new(1, 10, 9, 1, 13, 12))
                    })
                ],
                position: Some(Position::new(1, 1, 0, 1, 13, 12))
            })],
            position: Some(Position::new(1, 1, 0, 1, 13, 12))
        }),
        "should support mdx expressions (text) as `MdxTextExpression`s in mdast"
    );

    Ok(())
}

/// Note: these tests are also in `micromark/micromark-extension-mdx-expression`
/// at `tests/index.js`.
#[test]
fn mdx_expression_text_gnostic() -> Result<(), message::Message> {
    let swc = Options {
        parse: ParseOptions {
            constructs: Constructs::mdx(),
            mdx_esm_parse: Some(Box::new(parse_esm)),
            mdx_expression_parse: Some(Box::new(parse_expression)),
            ..Default::default()
        },
        ..Default::default()
    };

    assert_eq!(
        to_html_with_options("a {b} c", &swc)?,
        "<p>a  c</p>",
        "should support an expression"
    );

    assert_eq!(
        to_html_with_options("a {??} b", &swc)
            .err()
            .unwrap()
            .to_string(),
        "1:9: Could not parse expression with swc: Expression expected (mdx:swc)",
        "should crash on an incorrect expression"
    );

    assert_eq!(
        to_html_with_options("a {} b", &swc)?,
        "<p>a  b</p>",
        "should support an empty expression"
    );

    assert_eq!(
        to_html_with_options("a {b c", &swc)
            .err()
            .unwrap()
            .to_string(),
        "1:7: Unexpected end of file in expression, expected a corresponding closing brace for `{` (markdown-rs:unexpected-eof)",
        "should crash if no closing brace is found (1)"
    );

    assert_eq!(
        to_html_with_options("a {b { c } d", &swc)
            .err()
            .unwrap()
            .to_string(),
        "1:13: Could not parse expression with swc: Unexpected content after expression (mdx:swc)",
        "should crash if no closing brace is found (2)"
    );

    assert_eq!(
        to_html_with_options("a {\n} b", &swc)?,
        "<p>a  b</p>",
        "should support a line ending in an expression"
    );

    assert_eq!(
        to_html_with_options("a } b", &swc)?,
        "<p>a } b</p>",
        "should support just a closing brace"
    );

    assert_eq!(
        to_html_with_options("{ a } b", &swc)?,
        "<p> b</p>",
        "should support expressions as the first thing when following by other things"
    );

    assert_eq!(
        to_html_with_options("a { /* { */ } b", &swc)?,
        "<p>a  b</p>",
        "should support an unbalanced opening brace (if JS permits)"
    );

    assert_eq!(
        to_html_with_options("a { /* } */ } b", &swc)?,
        "<p>a  b</p>",
        "should support an unbalanced closing brace (if JS permits)"
    );

    assert_eq!(
        to_mdast(
            "> alpha {`\n> bravo\n>  charlie\n>   delta\n>    echo\n> `} foxtrot.",
            &swc.parse
        )?,
        Node::Root(Root {
            children: vec![Node::Blockquote(Blockquote {
                children: vec![Node::Paragraph(Paragraph {
                    children: vec![
                        Node::Text(Text {
                            value: "alpha ".into(),
                            position: Some(Position::new(1, 3, 2, 1, 9, 8)),
                        }),
                        Node::MdxTextExpression(MdxTextExpression {
                            value: "`\nbravo\ncharlie\ndelta\n echo\n`".into(),
                            position: Some(Position::new(1, 9, 8, 6, 5, 54)),
                            stops: vec![
                                (0, 9),
                                (1, 10),
                                (2, 13),
                                (7, 18),
                                (8, 22),
                                (15, 29),
                                (16, 34),
                                (21, 39),
                                (22, 44),
                                (27, 49),
                                (28, 52)
                            ]
                        }),
                        Node::Text(Text {
                            value: " foxtrot.".into(),
                            position: Some(Position::new(6, 5, 54, 6, 14, 63)),
                        }),
                    ],
                    position: Some(Position::new(1, 3, 2, 6, 14, 63))
                })],
                position: Some(Position::new(1, 1, 0, 6, 14, 63))
            })],
            position: Some(Position::new(1, 1, 0, 6, 14, 63))
        }),
        "should keep the correct number of spaces in a blockquote (text)"
    );

    Ok(())
}