Fix tests

gallery/builder.py

@@ -3,9 +3,13 @@
 import shutil
 from pathlib import Path
 from typing import Dict, Any, Optional
-from jinja2 import Environment, FileSystemLoader
+from jinja2 import Environment, FileSystemLoader, Template
 
 from gallery.config import GalleryConfig
+from gallery.utils.datetime_utils import (
+    datetime_from_timestamp,
+    strftime_filter,
+)
 from gallery.utils.metadata import (
     load_folder_metadata,
     merge_metadata,
@@ -18,7 +22,7 @@ from gallery.utils.processing import (
 )
 
 
-def get_template(template_dir: Optional[Path] = None):
+def get_template(template_dir: Optional[Path | str] = None):
     """
     Get the Jinja2 template for gallery rendering.
 
@@ -29,6 +33,9 @@ def get_template(template_dir: Optional[Path] = None):
     Returns:
         Jinja2 Template object
     """
+    if isinstance(template_dir, str):
+        template_dir = Path(template_dir)
+
     if template_dir is None:
         # Use package-included template
         import gallery
@@ -37,15 +44,6 @@ def get_template(template_dir: Optional[Path] = None):
 
     env = Environment(loader=FileSystemLoader(str(template_dir)))
 
-    def datetime_from_timestamp(timestamp: float):
-        """Convert a Unix timestamp to a datetime object."""
-        from datetime import datetime
-        return datetime.fromtimestamp(timestamp)
-
-    def strftime_filter(dt, fmt: str) -> str:
-        """Format a datetime object using strftime."""
-        return dt.strftime(fmt)
-
     env.filters['datetime_from_timestamp'] = datetime_from_timestamp
     env.filters['strftime'] = strftime_filter
 
@@ -54,9 +52,9 @@ def get_template(template_dir: Optional[Path] = None):
 
 def build_gallery(
     config: GalleryConfig,
-    template,
     source_dir: Path,
     web_dir: Path,
+    template: Template = None,
     relative_path: Path = None,
     inherited_metadata: Optional[Dict[str, Any]] = None,
 ) -> None:
@@ -75,6 +73,8 @@ def build_gallery(
         relative_path: Relative path from gallery root (for navigation)
         inherited_metadata: Metadata inherited from parent directories
     """
+    if not template:
+        template = Template("./templates/gallery.html")
     if relative_path is None:
         relative_path = Path(".")