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a861ed8fe7
**Summary** Use more sophisticated algorithm for splitting oversized `Table` elements into `TableChunk` elements during chunking to ensure element text and HTML are "synchronized" and HTML is always parseable. **Additional Context** Table splitting now has the following characteristics: - `TableChunk.metadata.text_as_html` is always a parseable HTML `<table>` subtree. - `TableChunk.text` is always the text in the HTML version of the table fragment in `.metadata.text_as_html`. Text and HTML are "synchronized". - The table is divided at a whole-row boundary whenever possible. - A row is broken at an even-cell boundary when a single row is larger than the chunking window. - A cell is broken at an even-word boundary when a single cell is larger than the chunking window. - `.text_as_html` is "minified", removing all extraneous whitespace and unneeded elements or attributes. This maximizes the semantic "density" of each chunk.
204 lines
7.4 KiB
Python
204 lines
7.4 KiB
Python
# pyright: reportPrivateUsage=false
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"""Unit-test suite for the `unstructured.common.html_table` module."""
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from __future__ import annotations
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import pytest
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from lxml.html import fragment_fromstring
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from unstructured.common.html_table import (
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HtmlCell,
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HtmlRow,
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HtmlTable,
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htmlify_matrix_of_cell_texts,
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)
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class Describe_htmlify_matrix_of_cell_texts:
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"""Unit-test suite for `unstructured.common.html_table.htmlify_matrix_of_cell_texts()`."""
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def test_htmlify_matrix_handles_empty_cells(self):
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assert htmlify_matrix_of_cell_texts([["cell1", "", "cell3"], ["", "cell5", ""]]) == (
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"<table>"
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"<tr><td>cell1</td><td/><td>cell3</td></tr>"
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"<tr><td/><td>cell5</td><td/></tr>"
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"</table>"
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)
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def test_htmlify_matrix_handles_special_characters(self):
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assert htmlify_matrix_of_cell_texts([['<>&"', "newline\n"]]) == (
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"<table><tr><td><>&"</td><td>newline<br/></td></tr></table>"
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)
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def test_htmlify_matrix_handles_multiple_rows_and_cells(self):
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assert htmlify_matrix_of_cell_texts([["cell1", "cell2"], ["cell3", "cell4"]]) == (
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"<table>"
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"<tr><td>cell1</td><td>cell2</td></tr>"
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"<tr><td>cell3</td><td>cell4</td></tr>"
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"</table>"
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)
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def test_htmlify_matrix_handles_empty_matrix(self):
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assert htmlify_matrix_of_cell_texts([]) == ""
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class DescribeHtmlTable:
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"""Unit-test suite for `unstructured.common.html_table.HtmlTable`."""
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def it_can_construct_from_html_text(self):
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html_table = HtmlTable.from_html_text("<table><tr><td>foobar</td></tr></table>")
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assert isinstance(html_table, HtmlTable)
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assert html_table._table.tag == "table"
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@pytest.mark.parametrize(
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"html_text",
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[
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"<table><tr><td>foobar</td></tr></table>",
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"<body><table><tr><td>foobar</td></tr></table></body>",
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"<html><body><table><tr><td>foobar</td></tr></table></body></html>",
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],
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)
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def it_can_find_a_table_wrapped_in_an_html_or_body_element(self, html_text: str):
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html_table = HtmlTable.from_html_text(html_text)
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assert isinstance(html_table, HtmlTable)
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assert html_table._table.tag == "table"
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def but_it_raises_when_no_table_element_is_present_in_the_html(self):
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with pytest.raises(ValueError, match="`html_text` contains no `<table>` element"):
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HtmlTable.from_html_text("<html><body><tr><td>foobar</td></tr></body></html>")
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def it_removes_any_attributes_present_on_the_table_element(self):
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html_table = HtmlTable.from_html_text(
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'<table border="1", class="foobar"><tr><td>foobar</td></tr></table>',
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)
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assert html_table.html == "<table><tr><td>foobar</td></tr></table>"
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@pytest.mark.parametrize(
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"html_text",
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[
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"<table><thead><tr><td>foobar</td></tr></thead></table>",
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"<table><thead><tr><td>foobar</td></tr></thead><tbody></tbody></table>",
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"<table><tbody><tr><td>foobar</td></tr></tbody><tfoot></tfoot></table>",
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],
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)
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def it_removes_any_thead_tbody_or_tfoot_elements_present_within_the_table_element(
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self, html_text: str
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):
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html_table = HtmlTable.from_html_text(html_text)
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assert html_table.html == "<table><tr><td>foobar</td></tr></table>"
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def it_changes_any_th_elements_to_td_elements_for_cell_element_uniformity(self):
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html_table = HtmlTable.from_html_text(
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"<table>"
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" <tr><th>a</th><th/><th>b</th></tr>"
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" <tr><td/><td>c</td><td/></tr>"
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"</table>"
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)
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assert html_table.html == (
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"<table><tr><td>a</td><td/><td>b</td></tr><tr><td/><td>c</td><td/></tr></table>"
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)
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def it_removes_any_extra_whitespace_between_elements_and_normalizes_whitespace_in_text(self):
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html_table = HtmlTable.from_html_text(
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"\n <table>\n <tr>\n <td>\tabc def\nghi </td>\n </tr>\n</table>\n ",
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)
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assert html_table.html == "<table><tr><td>abc def ghi</td></tr></table>"
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def it_can_serialize_the_table_element_to_str_html_text(self):
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table = fragment_fromstring("<table><tr><td>foobar</td></tr></table>")
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html_table = HtmlTable(table)
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assert html_table.html == "<table><tr><td>foobar</td></tr></table>"
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def it_can_iterate_the_rows_in_the_table(self):
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html_table = HtmlTable.from_html_text(
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"<table>"
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" <tr><td>abc</td><td>def</td><td>ghi</td></tr>"
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" <tr><td>jkl</td><td>mno</td><td>pqr</td></tr>"
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" <tr><td>stu</td><td>vwx</td><td>yz</td></tr>"
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"</table>"
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)
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row_iter = html_table.iter_rows()
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row = next(row_iter)
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assert isinstance(row, HtmlRow)
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assert row.html == "<tr><td>abc</td><td>def</td><td>ghi</td></tr>"
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# --
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row = next(row_iter)
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assert isinstance(row, HtmlRow)
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assert row.html == "<tr><td>jkl</td><td>mno</td><td>pqr</td></tr>"
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# --
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row = next(row_iter)
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assert isinstance(row, HtmlRow)
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assert row.html == "<tr><td>stu</td><td>vwx</td><td>yz</td></tr>"
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# --
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with pytest.raises(StopIteration):
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next(row_iter)
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def it_provides_access_to_the_clear_concatenated_text_of_the_table(self):
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html_table = HtmlTable.from_html_text(
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"<table>"
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" <tr><th> a\n b c </th><th/><th>def</th></tr>"
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" <tr><td>gh \ti</td><td/><td>\n jk l </td></tr>"
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" <tr><td/><td> m n op\n</td><td/></tr>"
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"</table>"
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)
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assert html_table.text == "a b c def gh i jk l m n op"
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class DescribeHtmlRow:
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"""Unit-test suite for `unstructured.common.html_table.HtmlRow`."""
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def it_can_serialize_the_row_to_html(self):
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assert HtmlRow(fragment_fromstring("<tr><td>a</td><td>b</td><td/></tr>")).html == (
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"<tr><td>a</td><td>b</td><td/></tr>"
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)
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def it_can_iterate_the_cells_in_the_row(self):
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row = HtmlRow(fragment_fromstring("<tr><td>a</td><td>b</td><td/></tr>"))
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cell_iter = row.iter_cells()
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cell = next(cell_iter)
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assert isinstance(cell, HtmlCell)
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assert cell.html == "<td>a</td>"
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# --
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cell = next(cell_iter)
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assert isinstance(cell, HtmlCell)
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assert cell.html == "<td>b</td>"
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# --
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cell = next(cell_iter)
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assert isinstance(cell, HtmlCell)
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assert cell.html == "<td/>"
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# --
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with pytest.raises(StopIteration):
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next(cell_iter)
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def it_can_iterate_the_texts_of_the_cells_in_the_row(self):
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row = HtmlRow(fragment_fromstring("<tr><td>a</td><td>b</td><td/></tr>"))
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text_iter = row.iter_cell_texts()
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assert next(text_iter) == "a"
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assert next(text_iter) == "b"
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with pytest.raises(StopIteration):
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next(text_iter)
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class DescribeHtmlCell:
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"""Unit-test suite for `unstructured.common.html_table.HtmlCell`."""
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def it_can_serialize_the_cell_to_html(self):
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assert HtmlCell(fragment_fromstring("<td>a b c</td>")).html == "<td>a b c</td>"
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@pytest.mark.parametrize(
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("cell_html", "expected_value"),
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[("<td> Lorem ipsum </td>", "Lorem ipsum"), ("<td/>", "")],
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)
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def it_knows_the_text_in_the_cell(self, cell_html: str, expected_value: str):
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assert HtmlCell(fragment_fromstring(cell_html)).text == expected_value
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