1 files changed, 101 insertions, 0 deletions
diff --git a/crates/render-core/src/tests.rs b/crates/render-core/src/tests.rs
new file mode 100644
index 0000000..9c5eb5d
--- /dev/null
+++ b/crates/render-core/src/tests.rs
@@ -0,0 +1,101 @@
+use super::*;
+use msh_core::parse_model_payload;
+use nres::Archive;
+use std::fs;
+use std::path::{Path, PathBuf};
+
+fn collect_files_recursive(root: &Path, out: &mut Vec<PathBuf>) {
+    let Ok(entries) = fs::read_dir(root) else {
+        return;
+    };
+    for entry in entries.flatten() {
+        let path = entry.path();
+        if path.is_dir() {
+            collect_files_recursive(&path, out);
+        } else if path.is_file() {
+            out.push(path);
+        }
+    }
+}
+
+fn nres_test_files() -> Vec<PathBuf> {
+    let root = Path::new(env!("CARGO_MANIFEST_DIR"))
+        .join("..")
+        .join("..")
+        .join("testdata");
+    let mut files = Vec::new();
+    collect_files_recursive(&root, &mut files);
+    files.sort();
+    files
+        .into_iter()
+        .filter(|path| {
+            fs::read(path)
+                .map(|bytes| bytes.get(0..4) == Some(b"NRes"))
+                .unwrap_or(false)
+        })
+        .collect()
+}
+
+#[test]
+fn build_render_mesh_for_real_models() {
+    let archives = nres_test_files();
+    if archives.is_empty() {
+        eprintln!("skipping build_render_mesh_for_real_models: no NRes files in testdata");
+        return;
+    }
+
+    let mut models_checked = 0usize;
+    let mut meshes_non_empty = 0usize;
+    let mut bounds_non_empty = 0usize;
+
+    for archive_path in archives {
+        let archive = Archive::open_path(&archive_path)
+            .unwrap_or_else(|err| panic!("failed to open {}: {err}", archive_path.display()));
+        for entry in archive.entries() {
+            if !entry.meta.name.to_ascii_lowercase().ends_with(".msh") {
+                continue;
+            }
+            models_checked += 1;
+            let payload = archive.read(entry.id).unwrap_or_else(|err| {
+                panic!(
+                    "failed to read model '{}' from {}: {err}",
+                    entry.meta.name,
+                    archive_path.display()
+                )
+            });
+            let model = parse_model_payload(payload.as_slice()).unwrap_or_else(|err| {
+                panic!(
+                    "failed to parse model '{}' from {}: {err}",
+                    entry.meta.name,
+                    archive_path.display()
+                )
+            });
+            let mesh = build_render_mesh(&model, 0, 0);
+            if !mesh.vertices.is_empty() {
+                meshes_non_empty += 1;
+            }
+            if compute_bounds(&mesh.vertices).is_some() {
+                bounds_non_empty += 1;
+            }
+        }
+    }
+
+    assert!(models_checked > 0, "no MSH models found");
+    assert!(
+        meshes_non_empty > 0,
+        "all generated render meshes are empty"
+    );
+    assert_eq!(
+        meshes_non_empty, bounds_non_empty,
+        "bounds must be available for every non-empty mesh"
+    );
+}
+
+#[test]
+fn compute_bounds_handles_empty_and_non_empty() {
+    assert!(compute_bounds(&[]).is_none());
+    let bounds = compute_bounds(&[[1.0, 2.0, 3.0], [-2.0, 5.0, 0.5], [0.0, -1.0, 9.0]])
+        .expect("bounds expected");
+    assert_eq!(bounds.0, [-2.0, -1.0, 0.5]);
+    assert_eq!(bounds.1, [1.0, 5.0, 9.0]);
+}