merman-core 0.8.0-alpha.3

Mermaid parser + semantic model (headless; parity-focused).
Documentation 
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use crate::*;
use futures::executor::block_on;
use serde_json::json;

#[test]
fn parse_diagram_pie_basic() {
    let engine = Engine::new();
    let text = r#"pie showData
 "Cats": 2
 'Dogs': 3
 "#;
    let res = block_on(engine.parse_diagram(text, ParseOptions::default()))
        .unwrap()
        .unwrap();
    assert_eq!(res.meta.diagram_type, "pie");
    assert_eq!(
        res.model,
        json!({
            "type": "pie",
            "showData": true,
            "title": null,
            "accTitle": null,
            "accDescr": null,
            "sections": [
                { "label": "Cats", "value": 2.0 },
                { "label": "Dogs", "value": 3.0 }
            ]
        })
    );
}

#[test]
fn parse_diagram_pie_rejects_negative_slice_values_like_upstream() {
    let engine = Engine::new();
    let text = r#"pie title Default text position: Animal adoption
         "dogs" : -60.67
        "rats" : 40.12
        "#;
    let err = block_on(engine.parse_diagram(text, ParseOptions::default()))
        .unwrap_err()
        .to_string();
    assert_eq!(
        err,
        "Diagram parse error (pie): \"dogs\" has invalid value: -60.67. Negative values are not allowed in pie charts. All slice values must be >= 0."
    );
}

#[test]
fn parse_pie_exposes_11_15_config_defaults_and_overrides() {
    let engine = Engine::new();
    let default = block_on(engine.parse_metadata("pie\n\"A\": 1", ParseOptions::default()))
        .unwrap()
        .unwrap();
    let pie = &default.effective_config.as_value()["pie"];
    assert_eq!(pie["textPosition"], json!(0.75));
    assert_eq!(pie["donutHole"], json!(0));
    assert_eq!(pie["legendPosition"], json!("right"));
    assert_eq!(pie["highlightSlice"], json!(""));

    let configured = block_on(engine.parse_metadata(
        r#"%%{init: {"pie": {"textPosition": 0.5, "donutHole": 0.4, "legendPosition": "bottom", "highlightSlice": "A"}}}%%
pie
"A": 1"#,
        ParseOptions::default(),
    ))
    .unwrap()
    .unwrap();
    let pie = &configured.effective_config.as_value()["pie"];
    assert_eq!(pie["textPosition"], json!(0.5));
    assert_eq!(pie["donutHole"], json!(0.4));
    assert_eq!(pie["legendPosition"], json!("bottom"));
    assert_eq!(pie["highlightSlice"], json!("A"));
}

#[test]
fn parse_pie_editor_facts_expose_parser_backed_spans() {
    let engine = Engine::new();
    let text = r#"pie showData
  title Market Share
  accTitle: Accessibility title
  accDescr: Accessibility description
  "Cats": 2
  "Dogs": 3
"#;
    let facts = engine
        .parse_editor_semantic_facts_with_type_sync("pie", text, ParseOptions::strict())
        .unwrap()
        .unwrap();

    assert!(facts.directive_prefixes.iter().any(|p| p == "title"));
    assert!(facts.directive_prefixes.iter().any(|p| p == "accTitle"));
    assert!(facts.directive_prefixes.iter().any(|p| p == "accDescr"));
    assert!(
        facts
            .symbols
            .iter()
            .any(|symbol| symbol.name == "Cats" && symbol.kind == EditorSemanticKind::String)
    );
    assert!(
        facts
            .symbols
            .iter()
            .any(|symbol| symbol.name == "Dogs" && symbol.kind == EditorSemanticKind::String)
    );
    assert!(facts.expected_syntax.iter().any(|expected| {
        expected.kind == EditorExpectedSyntaxKind::Payload
            && expected.span
                == SourceSpan::new(text.find("2").unwrap(), text.find("2").unwrap() + 1)
    }));
}