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326"""Tests for docling_response_parser — pure functions for parsing docling-serve output."""
from __future__ import annotations
import pytest
from src.services.docling_response_parser import (
_extract_caption_text,
_resolve_ref,
detect_columns_from_json,
extract_figures_from_json,
get_page_info,
split_markdown_by_page,
)
# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------
def _make_json_content(
*,
pages: dict | None = None,
pictures: list | None = None,
body: dict | None = None,
texts: list | None = None,
) -> dict:
"""Build a minimal DoclingDocument JSON structure."""
doc: dict = {}
if pages is not None:
doc["pages"] = pages
else:
doc["pages"] = {
"1": {"size": {"width": 612.0, "height": 792.0}},
"2": {"size": {"width": 612.0, "height": 792.0}},
}
if pictures is not None:
doc["pictures"] = pictures
if body is not None:
doc["body"] = body
if texts is not None:
doc["texts"] = texts
return doc
def _make_picture(
*,
page_no: int = 1,
caption_text: str = "",
bbox: dict | None = None,
) -> dict:
"""Build a minimal PictureItem JSON entry."""
pic: dict = {
"prov": [
{
"page_no": page_no,
"bbox": bbox or {"l": 50, "t": 500, "r": 300, "b": 200, "coord_origin": "BOTTOMLEFT"},
}
],
}
if caption_text:
pic["text"] = caption_text
return pic
def _make_embedded_png_uri() -> str:
"""Create a valid data:image/png;base64,... URI with minimal PNG data."""
# 1x1 transparent PNG
png_bytes = (
b"\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01"
b"\x00\x00\x00\x01\x08\x06\x00\x00\x00\x1f\x15\xc4\x89"
b"\x00\x00\x00\nIDATx\x9cc\x00\x01\x00\x00\x05\x00\x01"
b"\r\n\xb4\x00\x00\x00\x00IEND\xaeB`\x82"
)
b64 = base64.b64encode(png_bytes).decode("ascii")
return f"data:image/png;base64,{b64}"
# ---------------------------------------------------------------------------
# split_markdown_by_page
# ---------------------------------------------------------------------------
class TestSplitMarkdownByPage:
def test_empty_content(self):
assert split_markdown_by_page("") == {}
def test_no_placeholders(self):
result = split_markdown_by_page("# Hello\n\nWorld")
assert result == {"1": "# Hello\n\nWorld"}
def test_two_pages(self):
md = "# Page 1\n\nContent A\n<!-- PAGE_BREAK -->\n# Page 2\n\nContent B"
result = split_markdown_by_page(md)
assert len(result) == 2
assert "Page 1" in result["1"]
assert "Page 2" in result["2"]
def test_three_pages(self):
md = "A<!-- PAGE_BREAK -->B<!-- PAGE_BREAK -->C"
result = split_markdown_by_page(md)
assert len(result) == 3
assert result["1"] == "A"
assert result["2"] == "B"
assert result["3"] == "C"
def test_custom_placeholder(self):
md = "A---BREAK---B"
result = split_markdown_by_page(md, placeholder="---BREAK---")
assert len(result) == 2
def test_trailing_placeholder_no_empty_page(self):
md = "Content<!-- PAGE_BREAK -->"
result = split_markdown_by_page(md)
# Empty trailing page is stripped
assert len(result) == 1
assert result["1"] == "Content"
def test_empty_first_page_still_included(self):
md = "<!-- PAGE_BREAK -->Second page"
result = split_markdown_by_page(md)
assert "1" in result # Empty first page still included
assert "2" in result
# ---------------------------------------------------------------------------
# extract_figures_from_json
# ---------------------------------------------------------------------------
class TestExtractFiguresFromJson:
def test_no_pictures(self):
doc = _make_json_content(pictures=[])
assert extract_figures_from_json(doc) == []
def test_no_pictures_key(self):
assert extract_figures_from_json({}) == []
def test_single_figure_with_bbox(self):
bbox = {"l": 100, "t": 500, "r": 400, "b": 200, "coord_origin": "BOTTOMLEFT"}
doc = _make_json_content(
pictures=[_make_picture(page_no=2, caption_text="A chart", bbox=bbox)]
)
figures = extract_figures_from_json(doc)
assert len(figures) == 1
fig = figures[0]
assert fig["ref_id"] == "figure-1"
assert fig["caption"] == "A chart"
assert fig["page_number"] == 2
assert fig["bbox"] == bbox
assert fig["page_width"] == 612.0
assert fig["page_height"] == 792.0
def test_multiple_figures(self):
doc = _make_json_content(
pictures=[
_make_picture(page_no=1),
_make_picture(page_no=3),
],
pages={
"1": {"size": {"width": 612.0, "height": 792.0}},
"3": {"size": {"width": 612.0, "height": 792.0}},
},
)
figures = extract_figures_from_json(doc)
assert len(figures) == 2
assert figures[0]["ref_id"] == "figure-1"
assert figures[1]["ref_id"] == "figure-2"
assert figures[0]["page_number"] == 1
assert figures[1]["page_number"] == 3
def test_skips_picture_without_provenance(self):
pic = {"prov": []}
doc = _make_json_content(pictures=[pic])
assert extract_figures_from_json(doc) == []
def test_skips_picture_without_bbox(self):
pic = {"prov": [{"page_no": 1}]}
doc = _make_json_content(pictures=[pic])
assert extract_figures_from_json(doc) == []
def test_uses_default_page_dimensions(self):
"""When page size is missing, defaults to US Letter (612x792)."""
doc = _make_json_content(
pictures=[_make_picture(page_no=5)],
pages={},
)
figures = extract_figures_from_json(doc)
assert len(figures) == 1
assert figures[0]["page_width"] == 612.0
assert figures[0]["page_height"] == 792.0
# ---------------------------------------------------------------------------
# _extract_caption_text
# ---------------------------------------------------------------------------
class TestExtractCaptionText:
def test_direct_text_field(self):
pic = {"text": "Figure 1: Results"}
assert _extract_caption_text(pic, {}) == "Figure 1: Results"
def test_captions_list_with_inline_text(self):
pic = {"captions": [{"text": "Caption A"}, {"text": "Caption B"}]}
result = _extract_caption_text(pic, {})
assert "Caption A" in result
assert "Caption B" in result
def test_captions_list_with_ref(self):
pic = {"captions": [{"$ref": "#/texts/0"}]}
doc = {"texts": [{"text": "Referenced caption"}]}
assert _extract_caption_text(pic, doc) == "Referenced caption"
def test_no_caption(self):
assert _extract_caption_text({}, {}) == ""
# ---------------------------------------------------------------------------
# _resolve_ref
# ---------------------------------------------------------------------------
class TestResolveRef:
def test_simple_ref(self):
doc = {"texts": [{"text": "hello"}]}
assert _resolve_ref("#/texts/0", doc) == "hello"
def test_nested_ref(self):
doc = {"body": {"children": [{"text": "nested"}]}}
assert _resolve_ref("#/body/children/0", doc) == "nested"
def test_invalid_ref(self):
assert _resolve_ref("#/nonexistent/0", {}) == ""
def test_non_hash_ref(self):
assert _resolve_ref("external/ref", {}) == ""
# ---------------------------------------------------------------------------
# detect_columns_from_json
# ---------------------------------------------------------------------------
class TestDetectColumnsFromJson:
def test_single_column(self):
"""Full-width items → single column."""
body = {
"children": [
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 100, "r": 562, "b": 200}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 200, "r": 562, "b": 300}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 300, "r": 562, "b": 400}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 400, "r": 562, "b": 500}}]},
]
}
doc = _make_json_content(body=body)
assert detect_columns_from_json(doc, 1) == "single_column"
def test_double_column(self):
"""Narrow items in both halves → double column."""
body = {
"children": [
# Left column items
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 100, "r": 280, "b": 200}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 200, "r": 280, "b": 300}}]},
# Right column items
{"prov": [{"page_no": 1, "bbox": {"l": 330, "t": 100, "r": 562, "b": 200}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 330, "t": 200, "r": 562, "b": 300}}]},
]
}
doc = _make_json_content(body=body)
assert detect_columns_from_json(doc, 1) == "double_column"
def test_too_few_items(self):
"""Fewer than 4 items → unknown."""
body = {
"children": [
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 100, "r": 562, "b": 200}}]},
]
}
doc = _make_json_content(body=body)
assert detect_columns_from_json(doc, 1) == "unknown"
def test_missing_page(self):
doc = _make_json_content(pages={"1": {"size": {"width": 612, "height": 792}}})
assert detect_columns_from_json(doc, 99) == "unknown"
def test_items_from_collections(self):
"""Items in top-level collections (texts, tables) are also considered."""
doc = _make_json_content(
texts=[
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 100, "r": 280, "b": 200}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 50, "t": 200, "r": 280, "b": 300}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 330, "t": 100, "r": 562, "b": 200}}]},
{"prov": [{"page_no": 1, "bbox": {"l": 330, "t": 200, "r": 562, "b": 300}}]},
],
)
assert detect_columns_from_json(doc, 1) == "double_column"
# ---------------------------------------------------------------------------
# get_page_info
# ---------------------------------------------------------------------------
class TestGetPageInfo:
def test_two_pages(self):
doc = _make_json_content()
info = get_page_info(doc)
assert info["page_count"] == 2
assert info["pages"]["1"]["width"] == 612.0
assert info["pages"]["2"]["height"] == 792.0
def test_empty_pages(self):
info = get_page_info({"pages": {}})
assert info["page_count"] == 0
assert info["pages"] == {}
def test_no_pages_key(self):
info = get_page_info({})
assert info["page_count"] == 0