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# SPDX-License-Identifier: OpenMDW-1.1
import csv
import io
import json
from bs4 import BeautifulSoup
import pytest
from nemotron_parse import PostprocessOptions, postprocess_document, render_markdown
from nemotron_parse.postprocessing import (
extract_classes_bboxes,
transform_bbox_to_original,
postprocess_text,
convert_mmd_to_plain_text_ours,
)
from nemotron_parse import tables
def block(text, cls="Text", box=(0.1, 0.1, 0.9, 0.9)):
return f"<x_{box[0]}><y_{box[1]}>{text}<x_{box[2]}><y_{box[3]}><class_{cls}>"
def tabular(*rows, cols="cc"):
return (
"\\begin{tabular}{"
+ cols
+ "}\n"
+ "\n".join(row + r" \\" for row in rows)
+ "\n\\end{tabular}"
)
def test_multiline_cell_and_trailing_empty_preserved():
text = tabular(r"\thead{Name} & \thead{Note}", r"A & first\newline second", "B & ")
html = postprocess_text(text, "Table", table_format="HTML")
soup = BeautifulSoup(html, "html.parser")
rows = soup.find_all("tr")
assert len(rows) == 3
assert [len(row.find_all(["th", "td"])) for row in rows] == [2, 2, 2]
assert rows[1].find_all("td")[1].find("br")
assert rows[2].find_all("td")[1].get_text() == ""
def test_rich_inline_and_literal_escapes():
raw = tabular(
r"\thead{Item} & \thead{Note}",
r"A & \textstrong{Bold} \textsuperscript{2} \# \textasciitilde{} \textasciicircum{}",
)
html = postprocess_text(raw, "Table", table_format="HTML")
assert "<b>Bold</b>" in html and "<sup>2</sup>" in html
assert "# ~ ^" in html
assert r"\thead" not in html
def test_data_rows_not_promoted_to_headers():
raw = tabular("A & 10", "B & 20")
html = postprocess_text(raw, "Table", table_format="HTML")
assert "<th" not in html
records = json.loads(postprocess_text(raw, "Table", table_format="json"))
assert [list(row.values()) for row in records] == [["A", "10"], ["B", "20"]]
assert records[0] == {"column_0": "A", "column_1": "10"}
def test_bold_header_inference_configurable():
raw = tabular("**Name** & **Value**", "A & 10")
assert "<th" in postprocess_text(raw, "Table", table_format="HTML")
assert "<th" not in postprocess_text(
raw,
"Table",
table_format="HTML",
options=PostprocessOptions(infer_headers=False),
)
def test_spans_and_hierarchical_export():
raw = tabular(r"\thead{\multirow{2}{*}{Region}} & \thead{Value}", r" & A", "B & 10")
# Use the supported outer-span/inner-header native syntax.
raw = raw.replace(
r"\thead{\multirow{2}{*}{Region}}", r"\multirow{2}{*}{\thead{Region}}"
)
html = postprocess_text(
raw,
"Table",
table_format="HTML",
options=PostprocessOptions(infer_headers=False),
)
soup = BeautifulSoup(html, "html.parser")
assert soup.find("th")["rowspan"] == "2"
obj = json.loads(tables.convert_html_table_to_json_hierarchical(html))
assert obj["headers"][0][0]["rowspan"] == 2
assert len(obj["data"]) == 2
def test_rowspan_grid_does_not_drop_later_columns():
html = '<table><tr><td rowspan="2">A</td></tr><tr><td>B</td><td>C</td></tr></table>'
records = json.loads(tables.convert_html_table_to_json(html))
assert list(records[1].values()) == ["A", "B", "C"]
@pytest.mark.parametrize(
"names",
[["A", "A", "A_1"], ["column", "", "column_1", ""], ["x", "x_1", "x", "x_2", "x"]],
)
def test_collision_free_json_names(names):
html = "<table><tr>" + "".join("<th>" + n + "</th>" for n in names) + "</tr><tr>"
values = list(map(str, range(len(names))))
html += "".join("<td>" + v + "</td>" for v in values) + "</tr></table>"
record = json.loads(tables.convert_html_table_to_json(html))[0]
assert len(record) == len(names)
assert list(record.values()) == values
def test_csv_and_markdown_keep_headerless_first_row():
raw = tabular("A & 10", "B & 20")
rows = list(
csv.reader(io.StringIO(postprocess_text(raw, "Table", table_format="csv")))
)
assert rows == [["column_0", "column_1"], ["A", "10"], ["B", "20"]]
md = postprocess_text(raw, "Table", table_format="markdown")
assert "| A | 10 |" in md and "| B | 20 |" in md
@pytest.mark.parametrize(
"source, expected",
[
("<sup>2</sup> and <sub>i</sub>", "^{2} and _{i}"),
("C# developer", "C# developer"),
("x * y * z", "x * y * z"),
("# Heading\nC# developer", "Heading\nC# developer"),
("`C# **code**` and $x_1 * y$", "`C# **code**` and $x_1 * y$"),
],
)
def test_plain_text(source, expected):
assert convert_mmd_to_plain_text_ours(source) == expected
def test_prefix_repair_and_exact_duplicate_cleanup():
raw = "<x_0.01><y_0.01><class_Title>" + block("Hello") * 2
result = postprocess_document(raw)
assert result["markdown"] == "Hello" and len(result["blocks"]) == 1
assert "<class_Title>" not in result["blocks"][0]["text"]
def test_distinct_coordinates_or_code_whitespace_not_deduplicated():
raw = block("Hello") + block("Hello", box=(0.1, 0.2, 0.9, 1.0))
assert len(postprocess_document(raw)["blocks"]) == 2
raw = block("a b", "Code") + block("a b", "Code")
assert len(postprocess_document(raw)["blocks"]) == 2
def test_page_number_and_formula_preserved():
result = postprocess_document(
block("1", "Page-number") + block("$a+b$", "Inline-formula")
)
assert [b["class"] for b in result["blocks"]] == ["Page-number", "Inline-formula"]
assert "1" in result["markdown"] and "$a+b$" in result["markdown"]
def test_text_cleanup_protects_code_and_math():
assert postprocess_text("inter\u00adnational<tbc>") == "international"
assert postprocess_text("• item", "List-item") == "- item"
assert postprocess_text("a\u00adb", "Code") == "a\u00adb"
assert postprocess_text("$a\u00adb$") == "$a\u00adb$"
@pytest.mark.parametrize(
"box", [(float("nan"), 0, 1, 1), (0, 0, float("inf"), 1), (0, 0, 1)]
)
def test_invalid_boxes_rejected(box):
with pytest.raises(ValueError):
transform_bbox_to_original(box, 100, 100)
def test_reversed_and_clipped_boxes():
assert transform_bbox_to_original((0.9, 1.2, -0.1, 0.2), 100, 200) == (
0.0,
40.0,
90.0,
200.0,
)
def test_chart_presentation_controls():
chart = "<chart>\ntitle: Sales\nsubtitle: FY2026\n| Item | Revenue |\n| --- | --- |\n| A | 32 (16.6%) |\n| B | 48 (25%) |\n</chart>"
raw = block(chart, "Chart")
ordinary = render_markdown(
raw, options=PostprocessOptions(split_chart_value_percent=False)
)
assert "Sales — FY2026" in ordinary and "32 (16.6%)" in ordinary
assert ">Percent<" not in ordinary
split = render_markdown(
raw, options=PostprocessOptions(split_chart_value_percent=True)
)
assert ">Percent<" in split and "<td>32</td>" in split and "<td>16.6%</td>" in split
assert (
render_markdown(raw, options=PostprocessOptions(render_charts=False)) == chart
)
def test_empty_chart_title_does_not_consume_metadata():
chart = (
"<chart>\ntitle:\nsubtitle: Keep\n| A | B |\n| --- | --- |\n| x | 1 |\n</chart>"
)
assert "subtitle: Keep" in render_markdown(block(chart, "Chart"))
def test_headings_and_original_text_exposed():
document = postprocess_document(
block("Title", "Title") + block("Section", "Section-header"),
image_size=(100, 200),
)
assert document["markdown"] == "# Title\n\n## Section"
assert document["blocks"][0]["text"] == "Title"
assert document["blocks"][0]["bbox_pixels"] == [10.0, 20.0, 90.0, 180.0]
def test_existing_top_level_imports():
import postprocessing
import latex2html
assert postprocessing.postprocess_text("text") == "text"
assert callable(latex2html.convert_html_table_to_json_hierarchical)
def test_unknown_class_is_not_dropped():
assert render_markdown(block("Future content", "Future-role")) == "Future content"
def test_presentation_caption_relocation_is_opt_in():
raw = block("Sales figure", "Caption", (0.1, 0.05, 0.9, 0.09)) + block(
"<chart>\n| Item | Value |\n| --- | --- |\n| A | 1 |\n</chart>",
"Chart",
(0.1, 0.1, 0.9, 0.9),
)
default = render_markdown(
raw, options=PostprocessOptions(relocate_chart_captions=False)
)
assert default.startswith("Sales figure\n\n")
moved = render_markdown(
raw, options=PostprocessOptions(relocate_chart_captions=True)
)
assert "<caption>Sales figure</caption>" in moved
assert moved.count("Sales figure") == 1
def test_body_spans_exposed_in_hierarchical_json():
html = (
'<table><tr><th>A</th><th>B</th></tr><tr><td colspan="2">Both</td></tr></table>'
)
obj = json.loads(tables.convert_html_table_to_json_hierarchical(html))
assert obj["body_cells"][0][0]["colspan"] == 2
assert obj["data"] == [["Both"]]
def test_malformed_table_is_preserved_instead_of_lossy_fallback():
raw = tabular(r"\multirow{2}{*}{\thead{missing brace} & x", " & y")
result = render_markdown(block(raw, "Table"))
assert raw in result
def test_document_preserves_malformed_table_and_reports_warning():
raw = tabular(r"\multirow{2}{*}{\thead{missing brace} & x", " & y")
document = postprocess_document(block(raw, "Table"))
assert document["blocks"][0]["content"] == raw
assert document["warnings"][0]["block_index"] == 0
@pytest.mark.parametrize("role", ["Code", "Formula"])
def test_literal_tabular_in_code_or_formula_is_not_converted(role):
text = tabular("A & 10", "B & 20")
assert render_markdown(block(text, role)) == text
def test_prose_discussing_tabular_is_not_reinterpreted_as_table():
text = "The LaTeX example uses " + tabular("A & 10", "B & 20") + " in its source."
assert render_markdown(block(text, "Text")) == text
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