Apply bold formatting to a run of text.
Library verdicts: python-docx: — docxjs: pass
| Feature id | docx/bold-text |
|---|---|
| Format | docx |
| Category | text-formatting |
| Spec | ecma-376-5-part-1 § 17.3.2.1 w:b |
| ID / part | Predicate | XPath | python-docx | docxjs |
|---|---|---|---|---|
bold-element-presentword/document.xml | existThe run carrying the bold text must have a <w:b> child inside <w:rPr>. | //w:r[w:t[normalize-space()='Hello bold world']]/w:rPr/w:b | — | — |
bold-val-not-falseword/document.xml | not-match = ^(0|false|off)$If w:val is present it must not explicitly disable bold. | //w:r[w:t[normalize-space()='Hello bold world']]/w:rPr/w:b/@w:val | — | — |
| ID | Predicate | Selector | python-docx | docxjs |
|---|---|---|---|---|
bold-text-rendered | css_selector/ match-text = Hello bold worldA DOM node marked bold (via <b>/<strong>, font-weight:bold, or font-weight:700) must contain the fixture text. | .docx-wrapper :is(b, strong), .docx-wrapper [style*='font-weight: bold'], .docx-wrapper [style*='font-weight:bold'], .docx-wrapper [style*='font-weight: 700'], .docx-wrapper [style*='font-weight:700'] | — | pass |
bold-text-visible | computed_style = ^(bold|700)$ style=font-weightThe computed font-weight on the bold run must be bold or 700. | .docx-wrapper :is(b, strong, span):not(:has(*)) | — | pass |
visual-matches-libreoffice-render | visual_ssimPlaywright screenshot of the rendered output must score >=85% SSIM against the LibreOffice-rendered reference PNG. | — | — |
scripts/gen_bold_text.py
#!/usr/bin/env python3
"""Generate ``fixtures/docx/bold-text.docx``.
A minimal document exercising the ``w:b`` bold-formatting element. One
paragraph containing one bold run. Designed to satisfy the assertions
in ``features/docx/bold-text.json``.
"""
from __future__ import annotations
from pathlib import Path
from docx import Document
_REPO_ROOT = Path(__file__).resolve().parent.parent
_OUT = _REPO_ROOT / "fixtures" / "docx" / "bold-text.docx"
def main() -> int:
doc = Document()
paragraph = doc.add_paragraph()
run = paragraph.add_run("Hello bold world")
run.bold = True
_OUT.parent.mkdir(parents=True, exist_ok=True)
doc.save(_OUT, reproducible=True)
print(_OUT)
return 0
if __name__ == "__main__":
raise SystemExit(main())
{
"$schema": "../manifest.schema.json",
"id": "docx/bold-text",
"title": "Bold text",
"format": "docx",
"category": "text-formatting",
"summary": "Apply bold formatting to a run of text.",
"spec": {
"source": "ecma-376-5-part-1",
"clause": "17.3.2.1",
"element": "w:b",
"rnc_reference": "spec/ecma-376-5/part-1/rnc/WordprocessingML.rnc",
"xsd_reference": "spec/ecma-376-5/part-1/xsd/wml.xsd",
"notes": "Word emits <w:b/> when bold is on. Empty element means true. w:val is optional; if present it must not be 0/false/off (those explicitly disable bold in a toggled style chain)."
},
"fixtures": {
"machine": "docx/bold-text",
"office": "docx/bold-text"
},
"generator": {
"python": "scripts/gen_bold_text.py"
},
"assertions": [
{
"id": "bold-element-present",
"part": "word/document.xml",
"namespaces": {
"w": "http://schemas.openxmlformats.org/wordprocessingml/2006/main"
},
"xpath": "//w:r[w:t[normalize-space()='Hello bold world']]/w:rPr/w:b",
"must": "exist",
"description": "The run carrying the bold text must have a <w:b> child inside <w:rPr>."
},
{
"id": "bold-val-not-false",
"part": "word/document.xml",
"namespaces": {
"w": "http://schemas.openxmlformats.org/wordprocessingml/2006/main"
},
"xpath": "//w:r[w:t[normalize-space()='Hello bold world']]/w:rPr/w:b/@w:val",
"must": "not-match",
"value": "^(0|false|off)$",
"description": "If w:val is present it must not explicitly disable bold."
}
],
"render_assertions": [
{
"id": "bold-text-rendered",
"kind": "css_selector",
"selector": ".docx-wrapper :is(b, strong), .docx-wrapper [style*='font-weight: bold'], .docx-wrapper [style*='font-weight:bold'], .docx-wrapper [style*='font-weight: 700'], .docx-wrapper [style*='font-weight:700']",
"must": "match-text",
"value": "Hello bold world",
"description": "A DOM node marked bold (via <b>/<strong>, font-weight:bold, or font-weight:700) must contain the fixture text."
},
{
"id": "bold-text-visible",
"kind": "computed_style",
"selector": ".docx-wrapper :is(b, strong, span):not(:has(*))",
"style_property": "font-weight",
"value": "^(bold|700)$",
"description": "The computed font-weight on the bold run must be bold or 700."
},
{
"id": "visual-matches-libreoffice-render",
"kind": "visual_ssim",
"min_ssim": 0.5,
"description": "Playwright screenshot of the rendered output must score >=85% SSIM against the LibreOffice-rendered reference PNG."
}
]
}

