Bnot : split large copies into pieces.

Script.org

@@ -235,6 +235,13 @@ OU
     =python -m copienator annotate-checks Interro/Copies/Copie01.pdf=.
     Le mode =--refaire= exige un fichier =refaire.json= et écrit dans
     =BRnot=.
+
+    Les documents sont limités à 32 000 pixels de haut, comme pour =BGnot=.
+    Les grandes copies sont découpées entre les labels en =Part1=, =Part2=,
+    etc., dans leur dossier =CopieXX=. L'export les nomme =CopieXX Part1.pdf=,
+    etc. Importer toutes les parties avant de lancer =read-annotations= :
+    elles sont réunies dans les résultats habituels de la copie. Une réponse
+    individuelle dépassant la limite produit une erreur explicite.
 OU
  2. =python -m copienator annotate-grouped Interro= dans =BGnot=
 
@@ -242,6 +249,10 @@ OU
     réponses par question.
     Enregistrées dans =BGnot=
 
+    Les groupes visent une hauteur maximale de 32 000 pixels. Si le bloc
+    d'un seul élève dépasse cette limite, il reste entier dans un groupe
+    dédié, même lorsqu'il ne contient qu'une seule réponse.
+
     _Needs_ : label_groups file (made automatically by this function),
     qui dit quelles questions regrouper.
 

copienator/annotation_documents.py

@@ -0,0 +1,27 @@
+"""Locate tablet documents, including the parts of a large checked copy."""
+from pathlib import Path
+
+from copienator.json_io import read_json
+
+MAX_HEIGHT_PX = 32000
+
+
+def copy_documents(directory: Path) -> list[Path]:
+    try:
+        metadata = read_json(directory / "bnote.json", default={})
+    except (OSError, ValueError):
+        # Ordinary documents need no manifest. Let the reader report bad metadata.
+        return [directory]
+    parts = metadata.get("parts", []) if isinstance(metadata, dict) else []
+    return [directory / name for name in parts] if parts else [directory]
+
+
+def tablet_documents(root: Path) -> list[tuple[str, Path]]:
+    documents = []
+    for directory in sorted(root.iterdir()):
+        if not directory.is_dir():
+            continue
+        for part in copy_documents(directory):
+            name = directory.name if part == directory else f"{directory.name} {part.name}"
+            documents.append((name, part))
+    return documents

copienator/commands/annotating_by_label.py

@@ -23,13 +23,12 @@ from copienator import (
     workspace_from_args,
 )
 from copienator.annotation_data import load_annotation_data
+from copienator.annotation_documents import MAX_HEIGHT_PX
 from copienator.commands import annotating, annotating_with_checks
 from copienator.commands.import_annotations import clear_import_directory
 from copienator.filesystem import staged_directory
 from copienator.utils import natural_key
 
-MAX_HEIGHT_PX = 32000
-
 
 def render_item(item):
     student_id, label, content = item
@@ -65,10 +64,10 @@ def save_batch(batch, prefix, group_id, output_root: Path) -> None:
     print(f"Generating group PDF: {prefix} G{group_id} ({len(batch)} elements)")
     max_width = max(item[2].width for item in batch)
     total_height = sum(item[2].height for item in batch)
-    if total_height > MAX_HEIGHT_PX:
+    if total_height > MAX_HEIGHT_PX and len({item[0] for item in batch}) > 1:
         raise CliError(
             f"{prefix} G{group_id} would be {total_height} px high; "
-            f"the maximum is {MAX_HEIGHT_PX} px."
+            f"only a single student's block may exceed {MAX_HEIGHT_PX} px."
         )
     concatenated = Image.new("RGB", (max_width, total_height), "white")
     draw = ImageDraw.Draw(concatenated)
@@ -293,12 +292,11 @@ def split_batches(rendered):
         student_height = sum(item[2].height for item in student_items)
 
         if student_height > MAX_HEIGHT_PX:
-            labels = ", ".join(item[1] for item in student_items)
-            raise CliError(
-                f"Copie{student_id} ({labels}) is {student_height} px high; "
-                f"one student's labels cannot be split across groups and the "
-                f"maximum group height is {MAX_HEIGHT_PX} px."
-            )
+            # Oversized blocks remain intact in a group of their own.
+            batches.append(list(student_items))
+            heights.append(student_height)
+            index = end
+            continue
 
         # Reuse space in earlier groups, keeping each student's block intact.
         for batch_index, height in enumerate(heights):

copienator/commands/annotating_with_checks.py

@@ -26,6 +26,7 @@ from copienator import (
     workspace_from_target,
 )
 from copienator.annotation_data import load_annotation_data
+from copienator.annotation_documents import MAX_HEIGHT_PX, copy_documents
 from copienator.commands import annotating
 from copienator.commands.import_annotations import clear_import_directory
 from copienator.filesystem import staged_directory
@@ -143,7 +144,11 @@ class CheckboxRenderer:
 
 
 def _output_complete(output_dir: Path) -> bool:
-    return all((output_dir / name).is_file() for name in EXPECTED_OUTPUTS)
+    return all(
+        (document / name).is_file()
+        for document in copy_documents(output_dir)
+        for name in EXPECTED_OUTPUTS
+    )
 
 
 def _render_student(
@@ -197,7 +202,6 @@ def _render_student(
                 "label": label,
                 "header_height": header_height,
                 "layout": final_image.info.get('annotation_layout', annotating.layout_for(None)),
-                "img_h": final_image.height,
             }
         )
 
@@ -205,6 +209,46 @@ def _render_student(
         print(f"Warning: no annotations could be rendered for Copie{student_id}")
         return "partial"
 
+    batches = []
+    start = 0
+    height = 0
+    for index, image in enumerate(label_images):
+        if image.height > MAX_HEIGHT_PX:
+            raise CliError(
+                f"Copie{student_id} ({bnote_entries[index]['label']}) is "
+                f"{image.height} px high; a single answer cannot be split and "
+                f"the maximum document height is {MAX_HEIGHT_PX} px."
+            )
+        if height + image.height > MAX_HEIGHT_PX:
+            batches.append((start, index))
+            start = index
+            height = 0
+        height += image.height
+    batches.append((start, len(label_images)))
+
+    with staged_directory(output_dir) as staging:
+        parts = []
+        for index, (start, end) in enumerate(batches, start=1):
+            destination = staging
+            if len(batches) > 1:
+                name = f"Part{index}"
+                parts.append(name)
+                destination /= name
+            _save_document(destination, label_images[start:end],
+                           checkbox_groups[start:end], bnote_entries[start:end])
+        if parts:
+            atomic_write_json(staging / "bnote.json", {
+                "parts": parts, "images": bnote_entries,
+            })
+    return "partial" if problems else "success"
+
+
+def _save_document(
+    output_dir: Path,
+    label_images: list[Image.Image],
+    checkbox_groups: list[list[dict[str, Any]]],
+    bnote_entries: list[dict[str, Any]],
+) -> None:
     max_width = max(image.width for image in label_images)
     total_height = sum(image.height for image in label_images)
     concatenated = Image.new("RGB", (max_width, total_height), "white")
@@ -216,7 +260,6 @@ def _render_student(
         concatenated.paste(image, (0, current_y))
         bnote_entries[index]["hmin"] = current_y
         bnote_entries[index]["hmax"] = current_y + image.height
-        del bnote_entries[index]["img_h"]
         for item in checkboxes:
             box = item.get("final_box") or item.get("rel_box")
             item["global_box"] = [
@@ -228,15 +271,15 @@ def _render_student(
             checkbox_map.append(item)
         current_y += image.height
 
-    with staged_directory(output_dir) as staging:
+    output_dir.mkdir(parents=True, exist_ok=True)
     atomic_write_json(
-            staging / "bnote.json",
+        output_dir / "bnote.json",
         {"width": max_width, "height": total_height, "images": bnote_entries},
     )
-        atomic_write_json(staging / "checkboxes.json", checkbox_map)
-        reference = staging / "Reference.jpg"
+    atomic_write_json(output_dir / "checkboxes.json", checkbox_map)
+    reference = output_dir / "Reference.jpg"
     concatenated.save(reference, quality=90)
-        pdf_path = staging / "Concat.pdf"
+    pdf_path = output_dir / "Concat.pdf"
     pdf_canvas = canvas.Canvas(str(pdf_path), pagesize=(max_width, total_height))
     pdf_canvas.drawImage(
         str(reference),
@@ -246,7 +289,6 @@ def _render_student(
         height=total_height,
     )
     pdf_canvas.save()
-    return "partial" if problems else "success"
 
 
 def _copy_id_from_target(workspace: EvaluationWorkspace, target: Path) -> str | None:

copienator/commands/export.py

@@ -11,6 +11,7 @@ from copienator import (
     workspace_from_args,
 )
 from copienator.configuration import EXPORT_DIR
+from copienator.annotation_documents import tablet_documents
 from copienator.platform import replace_with_link_or_copy
 
 ANNOTATION_DIRECTORIES = ("BGnot", "Bnot", "Anot")
@@ -36,7 +37,9 @@ def export_directory(
             subdirs = [directory for directory in subdirs if not directory.name.startswith("Copie")]
 
     missing_outputs = 0
-    for subdir in subdirs:
+    for name, subdir in tablet_documents(source_dir):
+        if subdir not in subdirs and subdir.parent not in subdirs:
+            continue
         concat_file = next(
             (
                 candidate
@@ -52,7 +55,7 @@ def export_directory(
             )
             missing_outputs += 1
             continue
-        destination = sync_dir / f"{prefix}{subdir.name}{concat_file.suffix.lower()}"
+        destination = sync_dir / f"{prefix}{name}{concat_file.suffix.lower()}"
         method = replace_with_link_or_copy(concat_file, destination, prefer="hardlink")
         print(f"Exported: {destination} ({method})")
     return ExitCode.PARTIAL if missing_outputs else ExitCode.SUCCESS

copienator/commands/import_annotations.py

@@ -13,6 +13,7 @@ from copienator import (
     workspace_from_args,
 )
 from copienator import configuration
+from copienator.annotation_documents import tablet_documents
 
 ANNOTATION_DIRECTORIES = ("BGnot", "Bnot", "Anot")
 IMPORT_DIR = getattr(configuration, "IMPORT_DIR", None)
@@ -58,6 +59,7 @@ def sync_annotated(
         return ExitCode.INVALID_WORKSPACE
 
     missing_targets = 0
+    targets = dict(tablet_documents(annotation_dir))
     annotated_files = sorted(
         (
             path
@@ -70,10 +72,11 @@ def sync_annotated(
         if prefix and not annotated_file.stem.startswith(prefix):
             print(f"Ignoring return from another pass: {annotated_file.name}")
             continue
-        target_subdir = annotation_dir / annotated_file.stem.removeprefix(prefix)
+        name = annotated_file.stem.removeprefix(prefix)
+        target_subdir = targets.get(name)
 
-        if not target_subdir.is_dir():
-            print(f"Warning: directory not found: {target_subdir}", file=sys.stderr)
+        if target_subdir is None or not target_subdir.is_dir():
+            print(f"Warning: annotation document not found: {name}", file=sys.stderr)
             missing_targets += 1
         else:
             suffix = annotated_file.suffix.lower()

copienator/commands/reading_annotations.py

@@ -22,6 +22,7 @@ from copienator import (
 )
 from copienator.annotation_actions import apply_checkbox_actions, apply_score_overrides
 from copienator.annotation_data import AnnotationData, load_annotation_data
+from copienator.annotation_documents import copy_documents
 from copienator.annotation_layout import legacy_layout
 from copienator.annotation_modifications import (
     BASELINE,
@@ -154,6 +155,7 @@ def apply_actions_and_regenerate(
     all_labels: list[str],
     *,
     update_score: bool = False,
+    label_notes: dict[str, Image.Image] | None = None,
 ) -> ExitCode:
     """Apply annotations and atomically merge the regenerated student files."""
     output_dir = workspace.annotation_dir("checks") / f"Copie{student_id}"
@@ -205,7 +207,7 @@ def apply_actions_and_regenerate(
         scores[label] = str(result.get("score", 0))
         is_empty = result.get("error") == "empty-answer"
 
-        sub_note = None
+        sub_note = label_notes.get(label) if label_notes is not None else None
         if notes_layer is not None and "hmin" in image_info:
             hmin = int(image_info.get("hmin", 0))
             hmax = int(image_info.get("hmax", 0))
@@ -325,11 +327,33 @@ def run(
             status = ExitCode.PARTIAL
             continue
         print(f"Processing annotations for: {student_id}")
-        actions, notes = ([], None) if only_empty else detect_checks_and_notes(output_dir)
-        if notes is None and not actions and not update_score and not only_empty:
+        documents = copy_documents(output_dir)
+        label_notes = None
+        actions, notes = [], None
+        if not only_empty and documents == [output_dir]:
+            actions, notes = detect_checks_and_notes(output_dir)
+        elif not only_empty:
+            label_notes = {}
+            incomplete = False
+            for document in documents:
+                part_actions, part_notes = detect_checks_and_notes(document)
+                if part_notes is None:
+                    incomplete = True
+                    continue
+                actions.extend(part_actions)
+                for item in read_json(document / "bnote.json")["images"]:
+                    label_notes[item["label"]] = part_notes.crop(
+                        (0, item["hmin"], part_notes.width, item["hmax"])
+                    )
+            if incomplete:
+                print("  Missing a readable annotation part; copy was preserved.")
+                status = ExitCode.PARTIAL
+                continue
+        if notes is None and not label_notes and not actions and not update_score and not only_empty:
             print("  No readable annotation input found.")
             status = ExitCode.PARTIAL
             continue
+        extra = {"label_notes": label_notes} if label_notes is not None else {}
         result = apply_actions_and_regenerate(
             workspace,
             loaded.data,
@@ -338,6 +362,7 @@ def run(
             notes,
             all_labels,
             update_score=update_score,
+            **extra,
         )
         if result != ExitCode.SUCCESS:
             status = ExitCode.PARTIAL

copienator/commands/reading_grouped_annotations.py

@@ -25,6 +25,7 @@ from copienator import (
 )
 from copienator.annotation_actions import apply_checkbox_actions, apply_score_overrides
 from copienator.annotation_data import AnnotationData, RefaireList, load_annotation_data
+from copienator.annotation_documents import copy_documents, tablet_documents
 from copienator.annotation_layout import legacy_layout
 from copienator.annotation_modifications import (
     BASELINE,
@@ -463,11 +464,10 @@ def _scan_redo_annotations(
     incomplete: set[str] = set()
     plans = []
     required = ("checkboxes.json", "Reference.jpg", "Concat_annotated.pdf")
-    for path in sorted(directory.iterdir()):
-        if not path.is_dir():
-            continue
+    for _name, path in tablet_documents(directory):
+        copy_name = path.name if path.name.startswith("Copie") else path.parent.name
         default_id = (
-            path.name.removeprefix("Copie") if path.name.startswith("Copie") else None
+            copy_name.removeprefix("Copie") if copy_name.startswith("Copie") else None
         )
         try:
             metadata = read_json(path / "bnote.json")
@@ -590,12 +590,12 @@ def run(
     if annotation_dir == "Bnot":
         for student_id in refaire_by_student:
             directory = workspace.root / annotation_dir / f"Copie{student_id}"
-            if directory.is_dir():
+            for document in copy_documents(directory) if directory.is_dir() else []:
                 _merge_scan_result(
                     actions_by_student,
                     notes_by_student,
                     _scan_annotation_directory(
-                        directory, default_student_id=student_id
+                        document, default_student_id=student_id
                     ),
                 )
 

tests/test_checked_documents.py

@@ -0,0 +1,156 @@
+"""Large checked copies survive the tablet round trip as separate documents."""
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+from PIL import Image, ImageDraw
+
+from copienator import CliError, EvaluationWorkspace, ExitCode, read_json
+from copienator.annotation_data import AnnotationLoadResult
+from copienator.annotation_documents import MAX_HEIGHT_PX, copy_documents
+from copienator.commands import annotating_with_checks as checks
+from copienator.commands import export, import_annotations, reading_annotations as reader
+from copienator.commands import reading_grouped_annotations as grouped_reader
+
+
+class CheckedDocumentTests(unittest.TestCase):
+    def setUp(self):
+        temporary = tempfile.TemporaryDirectory()
+        self.addCleanup(temporary.cleanup)
+        self.root = Path(temporary.name)
+        self.workspace = EvaluationWorkspace(self.root / 'Exam')
+        for name in ('Copies', 'Par label'):
+            (self.workspace.root / name).mkdir(parents=True)
+        (self.workspace.root / 'labels').write_text('Ex 1\nEx 2\nEx 3\n')
+        (self.workspace.root / 'correction.json').write_text('{}')
+        self.heights = {'Ex 1': 60, 'Ex 2': 40, 'Ex 3': 60}
+        self.labels = {}
+        for label in self.heights:
+            pdf = self.workspace.root / 'Copies' / f'{label}.pdf'
+            pdf.touch()
+            self.labels[label] = {'pdf_path': pdf, 'result': {'score': 2, 'feedback': []},
+                                  'coordinates': (0, 0)}
+        self.output = self.workspace.root / 'Bnot' / 'Copie01'
+
+    def compose(self, base, label, result, coordinates, **kwargs):
+        image = Image.new('RGB', (100, self.heights[label]), 'white')
+        callback = kwargs.get('draw_callback')
+        if callback:
+            callback.__self__.checkboxes.append({
+                'type': 'score', 'label': label, 'value': 3,
+                'final_box': [10, 5, 30, 25],
+            })
+            ImageDraw.Draw(image).rectangle((10, 5, 30, 25), outline='black', width=2)
+        return image, 0
+
+    def generate(self, overwrite=False):
+        with (
+            patch.object(checks, 'MAX_HEIGHT_PX', 100),
+            patch.object(checks.annotating, 'make_base_image', return_value=(None, 0, 0)),
+            patch.object(checks.annotating, 'compose_label_image', side_effect=self.compose),
+        ):
+            return checks._render_student(self.workspace, '01', self.labels,
+                                          overwrite=overwrite, output_mode='checks')
+
+    def test_splits_on_labels_and_resets_geometry_at_each_part(self):
+        self.assertEqual(MAX_HEIGHT_PX, 32000)
+        self.assertEqual(self.generate(), 'success')
+        parts = copy_documents(self.output)
+        self.assertEqual([part.name for part in parts], ['Part1', 'Part2'])
+        self.assertEqual([read_json(p / 'bnote.json')['height'] for p in parts], [100, 60])
+        self.assertEqual([item['hmin'] for item in read_json(self.output / 'bnote.json')['images']],
+                         [0, 60, 0])
+        self.assertEqual(read_json(parts[1] / 'checkboxes.json')[0]['global_box'], [10, 5, 30, 25])
+        self.assertTrue(checks._output_complete(self.output))
+        self.assertEqual(self.generate(), 'skipped')
+        (parts[1] / 'Reference.jpg').unlink()
+        self.assertFalse(checks._output_complete(self.output))
+
+    def test_overwrite_removes_stale_parts_and_keeps_small_copy_layout(self):
+        self.generate()
+        self.labels = {'Ex 1': self.labels['Ex 1']}
+        self.generate(overwrite=True)
+        self.assertEqual(copy_documents(self.output), [self.output])
+        self.assertTrue((self.output / 'Concat.pdf').is_file())
+        self.assertFalse((self.output / 'Part1').exists())
+
+    def test_single_oversized_answer_and_save_failure_preserve_previous_copy(self):
+        self.generate()
+        sentinel = self.output / 'sentinel'
+        sentinel.write_text('previous')
+        self.heights['Ex 3'] = 101
+        with self.assertRaisesRegex(CliError, 'Copie01.*Ex 3'):
+            self.generate(overwrite=True)
+        self.assertEqual(sentinel.read_text(), 'previous')
+        self.heights['Ex 3'] = 60
+        original = checks._save_document
+        def fail_second(directory, *args):
+            if directory.name == 'Part2':
+                raise OSError('disk full')
+            original(directory, *args)
+        with patch.object(checks, '_save_document', side_effect=fail_second):
+            with self.assertRaisesRegex(OSError, 'disk full'):
+                self.generate(overwrite=True)
+        self.assertEqual(sentinel.read_text(), 'previous')
+
+    def returned_parts(self):
+        self.generate()
+        export_root = self.root / 'Export'
+        with patch.object(export, 'EXPORT_DIR', export_root):
+            self.assertEqual(export.run(self.workspace, annotation_dir='Bnot'), ExitCode.SUCCESS)
+        self.assertEqual(sorted(p.name for p in (export_root / 'Exam').iterdir()),
+                         ['Copie01 Part1.pdf', 'Copie01 Part2.pdf'])
+        import_root = self.root / 'Import'
+        import_root.mkdir()
+        for part in copy_documents(self.output):
+            with Image.open(part / 'Reference.jpg') as reference:
+                image = reference.convert('RGB')
+            draw = ImageDraw.Draw(image)
+            # Change Ex 3's score and add handwriting in its body.
+            if part.name == 'Part2':
+                draw.rectangle((14, 9, 26, 21), fill='black')
+                draw.rectangle((70, 40, 85, 50), fill='black')
+            image.save(import_root / f'Copie01 {part.name}.pdf', 'PDF', resolution=72)
+        self.assertEqual(import_annotations.sync_annotated(
+            self.workspace, annotation_dir_name='Bnot', import_dir=import_root), ExitCode.SUCCESS)
+
+    def test_export_import_and_reader_merge_parts_without_moving_notes(self):
+        self.returned_parts()
+        with (
+            patch.object(reader, 'load_annotation_data', return_value=AnnotationLoadResult({'01': self.labels}, [])),
+            patch.object(reader.annotating, 'make_base_image', return_value=(None, 0, 0)),
+            patch.object(reader.annotating, 'compose_label_image', side_effect=self.compose),
+        ):
+            self.assertEqual(reader.run(self.workspace), ExitCode.SUCCESS)
+        self.assertEqual(read_json(self.output / 'score.json'), {'Ex 1': '2', 'Ex 2': '2', 'Ex 3': '3'})
+        with Image.open(self.output / 'Ex 3.jpg') as image:
+            self.assertLess(max(image.getpixel((77, 45))), 80)
+        with Image.open(self.output / 'Ex 1.jpg') as image:
+            self.assertGreater(min(image.getpixel((77, 45))), 230)
+
+    def test_missing_return_part_preserves_previous_regenerated_files(self):
+        self.returned_parts()
+        (self.output / 'Part2' / 'Concat_annotated.pdf').unlink()
+        (self.output / 'score.json').write_text('{"previous": true}')
+        with patch.object(reader, 'load_annotation_data', return_value=AnnotationLoadResult({'01': self.labels}, [])):
+            self.assertEqual(reader.run(self.workspace), ExitCode.PARTIAL)
+        self.assertEqual(read_json(self.output / 'score.json'), {'previous': True})
+
+    def test_redo_reader_accepts_split_copy_documents(self):
+        self.returned_parts()
+        # Redo uses the same document layout under BRnot.
+        self.output.parent.rename(self.workspace.root / 'BRnot')
+        actions, notes, incomplete = grouped_reader._scan_redo_annotations(
+            self.workspace.root / 'BRnot', {'01': set(self.labels)})
+        self.assertFalse(incomplete)
+        self.assertEqual(set(notes['01']), set(self.labels))
+        self.assertEqual(actions['01'][0]['label'], 'Ex 3')
+        (self.workspace.root / 'BRnot/Copie01/Part2/Concat_annotated.pdf').unlink()
+        _, _, incomplete = grouped_reader._scan_redo_annotations(
+            self.workspace.root / 'BRnot', {'01': set(self.labels)})
+        self.assertEqual(incomplete, {'01'})
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_gui_core.py

@@ -2338,12 +2338,28 @@ class StandardCliTests(unittest.TestCase):
             ("01", "Ex 2", image, 0, []),
             ("02", "Ex 1", image, 0, []),
         ]
-        with patch.object(module, "MAX_HEIGHT_PX", 100), self.assertRaises(
-            CliError
-        ) as raised:
-            module.split_batches(rendered)
-        self.assertIn("Copie01", str(raised.exception))
-        self.assertIn("cannot be split", str(raised.exception))
+        with patch.object(module, "MAX_HEIGHT_PX", 100):
+            batches = module.split_batches(rendered)
+        self.assertEqual(batches, [rendered[:2], rendered[2:]])
+
+    def test_grouped_oversized_answer_is_saved_as_its_own_group(self) -> None:
+        module = self.modules["annotating_by_label"]
+        rendered = [
+            ("01", "Ex 1", Image.new("RGB", (10, 40)), 0, []),
+            ("02", "Ex 1", Image.new("RGB", (10, 120)), 0, []),
+            ("03", "Ex 1", Image.new("RGB", (10, 50)), 0, []),
+        ]
+        with tempfile.TemporaryDirectory() as directory, patch.object(module, "MAX_HEIGHT_PX", 100):
+            batches = module.split_batches(rendered)
+            self.assertEqual(batches, [[rendered[0], rendered[2]], [rendered[1]]])
+            for index, batch in enumerate(batches, start=1):
+                module.save_batch(batch, "Ex 1", index, Path(directory))
+            metadata = read_json(Path(directory) / "Ex 1 G2/bnote.json")
+            self.assertEqual(metadata["height"], 120)
+            self.assertEqual([item["id"] for item in metadata["images"]], ["02"])
+            self.assertTrue((Path(directory) / "Ex 1 G2/Concat.pdf").is_file())
+            with self.assertRaises(CliError):
+                module.save_batch(rendered[:2], "Ex 1", 3, Path(directory))
 
     def test_grouped_batching_reuses_space_in_earlier_groups(self) -> None:
         module = self.modules["annotating_by_label"]