chore: import upstream snapshot with attribution

tests/test_astro_extraction.py

@@ -0,0 +1,143 @@
+"""Tests for `.astro` extraction (#850).
+
+Astro files have a TypeScript frontmatter block (`---...---`) at the top where
+nearly all imports live, followed by an HTML-with-expressions template and
+optionally `<script>` blocks. Tree-sitter-javascript fed the whole file produces
+a top-level ERROR node because the template is not valid JS, so the JS AST pass
+recovers nothing. The :func:`extract_astro` regex pass salvages imports from the
+frontmatter and any `<script>` blocks — same strategy as :func:`extract_svelte`.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+from graphify.detect import CODE_EXTENSIONS
+from graphify.extract import (
+    _make_id,
+    extract_astro,
+)
+
+
+def _write(path: Path, body: str) -> Path:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(body, encoding="utf-8")
+    return path
+
+
+def _import_targets(result: dict, *, relation: str | None = None) -> set[str]:
+    return {
+        str(e.get("target") or "")
+        for e in result.get("edges", [])
+        if relation is None or e.get("relation") == relation
+    }
+
+
+def test_astro_is_in_code_extensions():
+    """Without this, detect.py silently drops `.astro` from the AST pass (#850)."""
+    assert ".astro" in CODE_EXTENSIONS
+
+
+def test_extract_astro_picks_up_frontmatter_static_imports(tmp_path):
+    page = _write(
+        tmp_path / "src/pages/index.astro",
+        """---
+import Layout from '../layouts/Layout.astro';
+import Hero from '../components/Hero.astro';
+const { title } = Astro.props;
+---
+
+<Layout title={title}>
+  <Hero />
+</Layout>
+""",
+    )
+    # Sibling files so the resolver lands on real node ids, not phantoms.
+    layout = _write(tmp_path / "src/layouts/Layout.astro", "---\n---\n<slot />\n")
+    hero = _write(tmp_path / "src/components/Hero.astro", "---\n---\n<h1>hi</h1>\n")
+
+    result = extract_astro(page)
+    targets = _import_targets(result, relation="imports_from")
+    assert _make_id(str(layout)) in targets
+    assert _make_id(str(hero)) in targets
+
+
+def test_extract_astro_handles_dynamic_import_in_frontmatter(tmp_path):
+    page = _write(
+        tmp_path / "src/pages/lazy.astro",
+        """---
+const Mod = await import('./Other.astro');
+---
+
+<div>{Mod.default}</div>
+""",
+    )
+    other = _write(tmp_path / "src/pages/Other.astro", "---\n---\n<p>o</p>\n")
+
+    result = extract_astro(page)
+    targets = _import_targets(result, relation="dynamic_import")
+    assert _make_id(str(other)) in targets
+
+
+def test_extract_astro_picks_up_client_side_script_imports(tmp_path):
+    page = _write(
+        tmp_path / "src/pages/with-script.astro",
+        """---
+import Layout from '../layouts/Layout.astro';
+---
+
+<Layout>
+  <button id="b">click</button>
+</Layout>
+
+<script>
+  import { hydrate } from '../client/hydrate.ts';
+  hydrate(document.getElementById('b'));
+</script>
+""",
+    )
+    layout = _write(tmp_path / "src/layouts/Layout.astro", "---\n---\n<slot />\n")
+    hydrate = _write(tmp_path / "src/client/hydrate.ts", "export function hydrate(){}\n")
+
+    result = extract_astro(page)
+    targets = _import_targets(result, relation="imports_from")
+    assert _make_id(str(layout)) in targets
+    assert _make_id(str(hydrate)) in targets
+
+
+def test_extract_astro_no_frontmatter_does_not_crash(tmp_path):
+    """Astro permits frontmatter-less files (pure-HTML pages). Must not raise."""
+    page = _write(
+        tmp_path / "src/pages/plain.astro",
+        "<h1>no frontmatter here</h1>\n",
+    )
+    result = extract_astro(page)
+    # Empty/no-imports result is acceptable; the extractor must just not crash.
+    assert isinstance(result, dict)
+    assert _import_targets(result, relation="imports_from") == set()
+
+
+def test_extract_astro_handles_tsconfig_path_alias(tmp_path):
+    _write(
+        tmp_path / "tsconfig.json",
+        """{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": { "@components/*": ["src/components/*"] }
+  }
+}
+""",
+    )
+    page = _write(
+        tmp_path / "src/pages/alias.astro",
+        """---
+import Hero from '@components/Hero.astro';
+---
+
+<Hero />
+""",
+    )
+    hero = _write(tmp_path / "src/components/Hero.astro", "---\n---\n<h1>h</h1>\n")
+
+    result = extract_astro(page)
+    targets = _import_targets(result, relation="imports_from")
+    assert _make_id(str(hero)) in targets