A pattern or mirror of a suppressed feature has nothing to copy: its copies go with it and the pattern warns (the acceptance enclosure loses all four standoffs when Standoff is suppressed); scenario acceptance_pattern_of_suppressed_feature enabled

Fixes #42

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT

crates/engine/src/lib.rs

@@ -434,6 +434,8 @@ mod delete_face_tests;
 #[cfg(test)]
 mod extent_tests;
 #[cfg(test)]
+mod pattern_suppress_tests;
+#[cfg(test)]
 mod profile_refs_tests;
 #[cfg(test)]
 mod split_face_tests;

crates/engine/src/pattern_suppress_tests.rs

@@ -0,0 +1,35 @@
+//! A pattern of a suppressed feature has nothing to copy (#42): its copies go too, and the
+//! pattern says so.
+
+use serde_json::{Value, json};
+
+use crate::Session;
+
+fn run(s: &mut Session, id: &str, p: Value) -> Value {
+    match s.execute(id, &p) {
+        Ok(v) => v,
+        Err(e) => panic!("{id} {p}: {e}"),
+    }
+}
+
+fn volume(s: &Session, body: &str) -> f64 {
+    s.model.state().body(body).map(|b| solvecraft_kernel::measure(&b.body).unwrap().volume).unwrap_or(0.0)
+}
+
+#[test]
+fn suppressing_a_patterned_feature_removes_its_copies() {
+    let mut s = Session::default();
+    let script: Value = serde_json::from_str(include_str!("../../../examples/acceptance/sensor_enclosure.json")).unwrap();
+    s.run_script(&script).unwrap();
+    let full = volume(&s, "Case");
+    run(&mut s, "timeline.suppress", json!({"feature": "Standoff", "suppressed": true}));
+    let without = volume(&s, "Case");
+    // All four standoffs go (each 116.8 mm³), not just the seed.
+    assert!((full - without - 4.0 * 116.8).abs() < 2.0, "{full} → {without}");
+    let pattern = s.doc.find_feature("RectangularPattern1").unwrap().id;
+    let r = s.model.result(pattern).unwrap();
+    assert!(r.error.is_none() && r.warning.as_deref().is_some_and(|w| w.contains("Standoff")), "{r:?}");
+    // Back on: the four standoffs return.
+    run(&mut s, "timeline.suppress", json!({"feature": "Standoff", "suppressed": false}));
+    assert!((volume(&s, "Case") - full).abs() < 1e-6 * full);
+}