feat: add rendering-primitives crate, share non_import_rels across renderers

crates/adapters/rendering-primitives/tests/rendering_primitives_tests.rs

@@ -0,0 +1,50 @@
+use archlens_domain::{
+    FilePath, Relationship, RelationshipKind,
+};
+use archlens_rendering_primitives::{non_import_rels, sanitize_identifier};
+
+fn rel(src: &str, tgt: &str, kind: RelationshipKind) -> Relationship {
+    Relationship::new(src, tgt, kind).unwrap()
+}
+
+#[test]
+fn non_import_rels_excludes_import_relationships() {
+    let rels = vec![
+        rel("A", "B", RelationshipKind::Composition),
+        rel("C", "D", RelationshipKind::Import),
+        rel("E", "F", RelationshipKind::Inheritance),
+    ];
+    let filtered: Vec<_> = non_import_rels(&rels).collect();
+    assert_eq!(filtered.len(), 2);
+    assert!(filtered.iter().all(|r| r.kind() != RelationshipKind::Import));
+}
+
+#[test]
+fn non_import_rels_passes_all_non_import_kinds() {
+    let rels = vec![
+        rel("A", "B", RelationshipKind::Composition),
+        rel("C", "D", RelationshipKind::Inheritance),
+    ];
+    let filtered: Vec<_> = non_import_rels(&rels).collect();
+    assert_eq!(filtered.len(), 2);
+}
+
+#[test]
+fn sanitize_identifier_replaces_double_colon_with_underscore() {
+    assert_eq!(sanitize_identifier("foo::bar"), "foo_bar");
+}
+
+#[test]
+fn sanitize_identifier_replaces_hyphen_with_underscore() {
+    assert_eq!(sanitize_identifier("my-crate"), "my_crate");
+}
+
+#[test]
+fn sanitize_identifier_replaces_dot_with_underscore() {
+    assert_eq!(sanitize_identifier("v1.2"), "v1_2");
+}
+
+#[test]
+fn sanitize_identifier_replaces_space_with_underscore() {
+    assert_eq!(sanitize_identifier("my crate"), "my_crate");
+}