Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-mermaid/tests/pure_engine.rs

@@ -0,0 +1,178 @@
+//! Integration tests for the public render path through the default engine.
+//!
+//! These use only the public API (`default_engine` + `render_checked`) so they
+//! exercise the real, always-compiled dagre-based engine end to end.
+
+use xai_grok_mermaid::{
+    MermaidError, MermaidTheme, RenderLimits, RenderParams, default_engine, render_checked,
+};
+
+#[test]
+fn default_engine_renders_a_flowchart() {
+    let diagram = render_checked(
+        default_engine().as_ref(),
+        "flowchart LR\n  A[Start] --> B[Finish]",
+        &RenderParams::default(),
+        &RenderLimits::default(),
+    )
+    .expect("the default engine must render a flowchart");
+    assert!(diagram.width_px > 0 && diagram.height_px > 0);
+    let img = image::load_from_memory(&diagram.png).expect("output must be a valid PNG");
+    assert_eq!(img.width(), diagram.width_px);
+    assert_eq!(img.height(), diagram.height_px);
+}
+
+/// Untrusted-input contract through the real engine: a panic would surface as
+/// `MermaidError::Panic`, which we assert against. Unparseable input may return
+/// other errors (which degrade to the code-block fallback), never a panic.
+#[test]
+fn garbage_input_is_isolated_not_panicked() {
+    let limits = RenderLimits::default();
+    let params = RenderParams::default();
+    for garbage in ["", "@@@@", "%% comment only", "????", "\u{0}\u{1}\u{2}"] {
+        let out = render_checked(default_engine().as_ref(), garbage, &params, &limits);
+        assert!(
+            !matches!(out, Err(MermaidError::Panic(_))),
+            "engine panicked on {garbage:?}: {out:?}"
+        );
+    }
+}
+
+#[test]
+fn sequence_diagram_with_activations_renders_to_png() {
+    const SOURCE: &str = "sequenceDiagram\n\
+        participant Dev as Developer\n\
+        participant CI as CI Pipeline\n\
+        participant K8s as Kubernetes\n\
+        participant PD as PagerDuty\n\
+        participant Cat as Office Cat\n\
+        Dev->>CI: git push --force\n\
+        activate CI\n\
+        CI->>CI: run 4,000 tests\n\
+        CI-->>Dev: \u{2705} all green (suspicious)\n\
+        deactivate CI\n\
+        Dev->>K8s: deploy to prod\n\
+        activate K8s\n\
+        K8s-->>Dev: 200 OK\n\
+        deactivate K8s\n\
+        Note over Dev: leaves for lunch\n\
+        K8s->>PD: OOMKilled x47\n\
+        PD->>Dev: CALL CALL CALL\n\
+        Dev->>K8s: kubectl rollout undo\n\
+        K8s-->>Dev: phew\n\
+        Cat->>Dev: sits on keyboard\n\
+        Dev->>K8s: jjjjjjjjjjjjjjjj\n";
+    let diagram = render_checked(
+        default_engine().as_ref(),
+        SOURCE,
+        &RenderParams::default(),
+        &RenderLimits::default(),
+    )
+    .expect("a sequence diagram with activations must render");
+    let img = image::load_from_memory(&diagram.png).expect("output must be a valid PNG");
+    assert_eq!(img.width(), diagram.width_px);
+    assert_eq!(img.height(), diagram.height_px);
+}
+
+/// Regression: a class diagram using quoted cardinalities, stereotypes,
+/// generics, and the full relation set must render instead of erroring
+/// (previously failed with "Unrecognized classDiagram line" on
+/// `Owner "1" o-- "0..*" Animal`).
+#[test]
+fn class_diagram_with_cardinalities_renders() {
+    let src = "classDiagram\n    direction TB\n    class Animal {\n        <<abstract>>\n        #String name\n        +makeSound()* String\n    }\n    class Owner {\n        +List~Animal~ pets\n        +adopt(Animal pet) void\n    }\n    Animal <|-- Dog : extends\n    Feedable <|.. Animal : implements\n    Owner \"1\" o-- \"0..*\" Animal : owns\n    Dog \"1\" --> \"0..1\" Ball : plays with\n    Veterinarian ..> Animal : examines\n    HealthReport --* Animal : belongs to";
+    let engine = default_engine();
+    let diagram = render_checked(
+        engine.as_ref(),
+        src,
+        &RenderParams {
+            theme: MermaidTheme::Dark,
+            ..Default::default()
+        },
+        &RenderLimits::default(),
+    )
+    .expect("class diagram with quoted cardinalities must render");
+    assert!(!diagram.png.is_empty());
+}
+
+/// Same source + params must produce identical PNG bytes (the engine's text
+/// metrics are font-free, so rendering is deterministic).
+#[test]
+fn rendering_is_deterministic() {
+    let engine = default_engine();
+    let params = RenderParams::default();
+    let a = render_checked(
+        engine.as_ref(),
+        "flowchart LR\nA-->B-->C",
+        &params,
+        &RenderLimits::default(),
+    )
+    .expect("render a");
+    let b = render_checked(
+        engine.as_ref(),
+        "flowchart LR\nA-->B-->C",
+        &params,
+        &RenderLimits::default(),
+    )
+    .expect("render b");
+    assert_eq!(a.png, b.png, "same input must yield identical PNG bytes");
+}
+
+/// End-to-end guard for the word-wrap fix: the real user diagram (a flowchart of
+/// long Python identifiers) must reach the rendered SVG with its identifiers
+/// intact, never hard-sliced mid-identifier. Renders through the same
+/// `mermaid_to_svg::render_mermaid_to_svg` path the pager uses.
+#[test]
+fn long_identifier_node_labels_survive_intact_in_svg() {
+    let src = "flowchart TB
+    subgraph main [resi_local.py / resi.py]
+        nav[st.navigation]
+        mark[mark_filter_restore_context]
+        global[render_global_sidebar]
+        sidebar[render_page_sidebar_filters]
+        page[page.run]
+    end
+    nav --> mark --> global --> sidebar --> page";
+    let svg = mermaid_to_svg::render_mermaid_to_svg(src, None)
+        .expect("the real user flowchart must render to SVG");
+    // Each long identifier appears as a COMPLETE single tspan; a slice (at any
+    // offset) could never produce the whole identifier as one tspan's content.
+    assert!(
+        svg.contains(">mark_filter_restore_context</tspan>"),
+        "{svg}"
+    );
+    assert!(
+        svg.contains(">render_page_sidebar_filters</tspan>"),
+        "{svg}"
+    );
+}
+
+/// A categorical-x-axis xychart with two `line` series must render to a decodable
+/// PNG through the full `[Open Image]` path (source -> SVG -> raster), on both
+/// themes. The categorical x-axis (no `-->`) previously failed to open.
+#[test]
+fn categorical_xychart_with_two_series_renders_to_png() {
+    const SOURCE: &str = "xychart-beta\n    \
+        title \"Weekly active users by region\"\n    \
+        x-axis [\"Jan\", \"Feb\", \"Mar\", \"Apr\", \"May\", \"Jun\", \"Jul\", \"Aug\", \"Sep\", \"Oct\", \"Nov\", \"Dec\"]\n    \
+        y-axis \"% of users\" 0 --> 40\n    \
+        line [20.3, 22.6, 24.2, 24.3, 26.2, 27.2, 32.4, 31.9, 31.4, 31.1, 33.6, 34.3]\n    \
+        line [3.2, 6.3, 10.0, 9.4, 11.1, 10.7, 15.3, 13.4, 13.5, 12.5, 15.4, 15.8]";
+    let engine = default_engine();
+    for theme in [MermaidTheme::Light, MermaidTheme::Dark] {
+        let diagram = render_checked(
+            engine.as_ref(),
+            SOURCE,
+            &RenderParams {
+                theme,
+                ..Default::default()
+            },
+            &RenderLimits::default(),
+        )
+        .unwrap_or_else(|e| panic!("categorical xychart must render ({theme:?}): {e}"));
+        let img = image::load_from_memory(&diagram.png).expect("output must be a valid PNG");
+        assert_eq!(img.width(), diagram.width_px);
+        assert_eq!(img.height(), diagram.height_px);
+        assert!(diagram.width_px > 0 && diagram.height_px > 0);
+    }
+}