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These are real tests using actual HTML content - no mocks.
Tests verify that trafilatura correctly extracts main content
and removes structural noise.
"""
import pytest
# Skip entire module if trafilatura not installed
pytest.importorskip("trafilatura")
from headroom.transforms.html_extractor import (
HTMLExtractionResult,
HTMLExtractor,
HTMLExtractorConfig,
is_html_content,
)
class TestIsHtmlContent:
"""Tests for the is_html_content detection function."""
def test_detects_doctype_html(self):
"""Detects HTML with DOCTYPE declaration."""
html = "<!DOCTYPE html><html><body>Content</body></html>"
assert is_html_content(html) is True
def test_detects_html_tag(self):
"""Detects HTML with html tag."""
html = "<html><head></head><body>Content</body></html>"
assert is_html_content(html) is True
def test_detects_structural_tags(self):
"""Detects HTML with multiple structural tags (needs doctype or html tag)."""
# Note: is_html_content requires DOCTYPE or <html> tag, or 3+ structural tags
# Just structural tags alone may not trigger detection
html = "<html><div><nav>Menu</nav><article>Content</article><footer>Footer</footer></div></html>"
assert is_html_content(html) is True
def test_rejects_plain_text(self):
"""Rejects plain text."""
text = "This is just plain text with no HTML."
assert is_html_content(text) is False
def test_rejects_json(self):
"""Rejects JSON content."""
json_content = '{"name": "test", "value": 123}'
assert is_html_content(json_content) is False
def test_rejects_markdown(self):
"""Rejects markdown content."""
markdown = "# Heading\n\nParagraph with **bold** text."
assert is_html_content(markdown) is False
def test_rejects_code(self):
"""Rejects source code."""
code = "def hello():\n print('world')"
assert is_html_content(code) is False
def test_rejects_empty(self):
"""Rejects empty content."""
assert is_html_content("") is False
assert is_html_content(None) is False # type: ignore
def test_case_insensitive(self):
"""Detection is case insensitive."""
html = "<!DOCTYPE HTML><HTML><BODY>Content</BODY></HTML>"
assert is_html_content(html) is True
class TestHTMLExtractor:
"""Tests for HTMLExtractor content extraction."""
@pytest.fixture
def extractor(self):
"""Create a default HTMLExtractor."""
return HTMLExtractor()
def test_extracts_article_content(self, extractor):
"""Extracts main article content."""
html = """<!DOCTYPE html>
<html>
<head><title>Test Article</title></head>
<body>
<nav><a href="/">Home</a></nav>
<article>
<h1>Article Title</h1>
<p>This is the main content of the article.</p>
<p>It contains important information for the reader.</p>
</article>
<footer>Copyright 2024</footer>
</body>
</html>"""
result = extractor.extract(html)
assert "Article Title" in result.extracted
assert "main content" in result.extracted
assert "important information" in result.extracted
# Navigation and footer should be removed
assert "Home" not in result.extracted or "Copyright" not in result.extracted
def test_removes_script_tags(self, extractor):
"""Removes JavaScript content."""
html = """<!DOCTYPE html>
<html>
<head>
<script>
function malicious() {
alert('This should not appear');
console.log('Script content');
}
</script>
</head>
<body>
<article>
<p>Actual content that matters.</p>
</article>
<script>anotherScript();</script>
</body>
</html>"""
result = extractor.extract(html)
assert "malicious" not in result.extracted
assert "alert" not in result.extracted
assert "anotherScript" not in result.extracted
assert "Actual content" in result.extracted
def test_removes_style_tags(self, extractor):
"""Removes CSS content."""
html = """<!DOCTYPE html>
<html>
<head>
<style>
body { color: red; }
.hidden { display: none; }
</style>
</head>
<body>
<article>
<p>Real content here.</p>
</article>
</body>
</html>"""
result = extractor.extract(html)
assert "color: red" not in result.extracted
assert "display: none" not in result.extracted
assert "Real content" in result.extracted
def test_compression_ratio(self, extractor):
"""Verifies significant compression ratio."""
html = """<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<script src="analytics.js"></script>
<script>
var config = {tracking: true, debug: false};
function init() { console.log('initialized'); }
</script>
<style>
* { margin: 0; padding: 0; }
body { font-family: Arial; }
nav { background: #333; }
footer { background: #666; }
</style>
</head>
<body>
<header>
<nav>
<a href="/">Home</a>
<a href="/about">About</a>
<a href="/contact">Contact</a>
</nav>
</header>
<main>
<article>
<h1>Main Article Heading</h1>
<p>This is the first paragraph of actual content.</p>
<p>This is the second paragraph with more details.</p>
</article>
</main>
<aside>
<h3>Related Links</h3>
<ul>
<li><a href="/link1">Link 1</a></li>
<li><a href="/link2">Link 2</a></li>
</ul>
</aside>
<footer>
<p>Copyright 2024</p>
<p>Privacy Policy | Terms of Service</p>
</footer>
</body>
</html>"""
result = extractor.extract(html)
# Should achieve significant reduction
assert result.compression_ratio < 0.5 # At least 50% reduction
assert result.reduction_percent > 50
# Main content should be preserved
assert "Main Article Heading" in result.extracted
assert "first paragraph" in result.extracted
def test_extracts_metadata(self, extractor):
"""Extracts page metadata."""
html = """<!DOCTYPE html>
<html>
<head>
<title>Page Title for Testing</title>
<meta name="author" content="John Doe">
<meta name="description" content="A test page description">
</head>
<body>
<article>
<h1>Page Title for Testing</h1>
<p>Content here.</p>
</article>
</body>
</html>"""
result = extractor.extract(html)
assert result.title == "Page Title for Testing"
assert result.metadata.get("title") == "Page Title for Testing"
def test_handles_empty_html(self, extractor):
"""Handles empty HTML gracefully."""
result = extractor.extract("")
assert result.extracted == ""
assert result.original_length == 0
assert result.extracted_length == 0
def test_handles_whitespace_only(self, extractor):
"""Handles whitespace-only input."""
result = extractor.extract(" \n\t ")
assert result.extracted == ""
assert result.compression_ratio == 0.0
def test_handles_minimal_html(self, extractor):
"""Handles minimal HTML structure."""
html = "<p>Just a paragraph.</p>"
result = extractor.extract(html)
# trafilatura may or may not extract minimal content
# Just verify it doesn't crash
assert isinstance(result.extracted, str)
assert result.original_length > 0
def test_preserves_paragraphs(self, extractor):
"""Preserves paragraph structure."""
html = """<!DOCTYPE html>
<html>
<body>
<article>
<p>First paragraph.</p>
<p>Second paragraph.</p>
<p>Third paragraph.</p>
</article>
</body>
</html>"""
result = extractor.extract(html)
assert "First paragraph" in result.extracted
assert "Second paragraph" in result.extracted
assert "Third paragraph" in result.extracted
class TestHTMLExtractorConfig:
"""Tests for HTMLExtractor configuration options."""
def test_markdown_output_format(self):
"""Tests markdown output format."""
config = HTMLExtractorConfig(output_format="markdown")
extractor = HTMLExtractor(config)
html = """<!DOCTYPE html>
<html>
<body>
<article>
<h1>Heading</h1>
<p>Paragraph text.</p>
</article>
</body>
</html>"""
result = extractor.extract(html)
# Markdown format should include # for heading
assert "Heading" in result.extracted
def test_text_output_format(self):
"""Tests plain text output format."""
config = HTMLExtractorConfig(output_format="txt")
extractor = HTMLExtractor(config)
html = """<!DOCTYPE html>
<html>
<body>
<article>
<h1>Heading</h1>
<p>Paragraph text.</p>
</article>
</body>
</html>"""
result = extractor.extract(html)
assert "Heading" in result.extracted
assert "Paragraph" in result.extracted
def test_disable_metadata_extraction(self):
"""Tests disabling metadata extraction."""
config = HTMLExtractorConfig(extract_metadata=False)
extractor = HTMLExtractor(config)
html = """<!DOCTYPE html>
<html>
<head><title>Test Title</title></head>
<body><article><p>Content.</p></article></body>
</html>"""
result = extractor.extract(html)
# Metadata should be empty when disabled
assert result.title is None
assert result.metadata == {}
class TestHTMLExtractionResult:
"""Tests for HTMLExtractionResult dataclass."""
def test_reduction_percent_calculation(self):
"""Tests reduction percent calculation."""
result = HTMLExtractionResult(
extracted="short",
original="much longer content here",
original_length=100,
extracted_length=25,
compression_ratio=0.25,
)
assert result.reduction_percent == 75.0
def test_reduction_percent_with_zero_original(self):
"""Tests reduction percent with zero original length."""
result = HTMLExtractionResult(
extracted="",
original="",
original_length=0,
extracted_length=0,
compression_ratio=0.0,
)
assert result.reduction_percent == 0.0
class TestRealWorldHTML:
"""Tests with realistic HTML content."""
@pytest.fixture
def extractor(self):
return HTMLExtractor()
def test_news_article_structure(self, extractor):
"""Tests extraction from news-article-like structure."""
html = """<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Breaking News: Important Event Happens</title>
<script>window.analytics = {};</script>
<style>.ad { display: block; }</style>
</head>
<body>
<header>
<nav class="main-nav">
<a href="/">Home</a>
<a href="/news">News</a>
<a href="/sports">Sports</a>
</nav>
</header>
<div class="ad-banner">Advertisement Here</div>
<main>
<article class="news-article">
<h1>Breaking News: Important Event Happens</h1>
<p class="byline">By Jane Reporter | January 15, 2024</p>
<p>In a surprising turn of events, something important happened today
that will affect millions of people around the world.</p>
<p>Experts say this development represents a major shift in how
we think about the topic at hand.</p>
<p>"This is truly unprecedented," said Dr. Expert, a leading
authority in the field.</p>
<p>The implications of this event are still being analyzed, but
early reports suggest significant changes ahead.</p>
</article>
</main>
<aside class="sidebar">
<h3>Trending Stories</h3>
<ul>
<li><a href="/story1">Story 1</a></li>
<li><a href="/story2">Story 2</a></li>
</ul>
</aside>
<footer>
<p>© 2024 News Site</p>
<a href="/privacy">Privacy Policy</a>
</footer>
<script>trackPageView();</script>
</body>
</html>"""
result = extractor.extract(html)
# Main article content should be preserved
assert "Important Event Happens" in result.extracted
assert "surprising turn of events" in result.extracted
assert "Dr. Expert" in result.extracted
# Noise should be removed or minimized
assert "trackPageView" not in result.extracted
assert "window.analytics" not in result.extracted
# Significant reduction
assert result.compression_ratio < 0.4
def test_documentation_page(self, extractor):
"""Tests extraction from documentation-like page."""
html = """<!DOCTYPE html>
<html>
<head>
<title>API Documentation - MyService</title>
</head>
<body>
<nav class="docs-nav">
<a href="/docs">Docs</a>
<a href="/api">API</a>
<a href="/guides">Guides</a>
</nav>
<div class="sidebar">
<h3>Table of Contents</h3>
<ul>
<li><a href="#intro">Introduction</a></li>
<li><a href="#auth">Authentication</a></li>
</ul>
</div>
<main class="content">
<h1>API Documentation</h1>
<section id="intro">
<h2>Introduction</h2>
<p>Welcome to the MyService API documentation. This guide will
help you integrate our service into your application.</p>
</section>
<section id="auth">
<h2>Authentication</h2>
<p>All API requests require authentication using an API key.
Include your key in the Authorization header.</p>
<pre><code>Authorization: Bearer YOUR_API_KEY</code></pre>
</section>
</main>
<footer>Built with Docs Generator</footer>
</body>
</html>"""
result = extractor.extract(html)
# Documentation content should be preserved
assert "API Documentation" in result.extracted
assert "Authentication" in result.extracted
assert "API key" in result.extracted
def test_blog_post(self, extractor):
"""Tests extraction from blog-post-like structure."""
html = """<!DOCTYPE html>
<html>
<head>
<title>My Blog Post Title - Personal Blog</title>
<meta name="author" content="Blog Author">
</head>
<body>
<header>
<h1 class="site-title">My Personal Blog</h1>
<nav>Home | About | Contact</nav>
</header>
<article class="blog-post">
<h1>My Blog Post Title</h1>
<time>Posted on March 15, 2024</time>
<p>Today I want to share my thoughts on an interesting topic
that I've been thinking about for a while.</p>
<p>The key insight is that we often overlook the simple things
in life that bring us joy.</p>
<p>In conclusion, I believe we should all take more time to
appreciate the small moments.</p>
</article>
<section class="comments">
<h3>Comments</h3>
<div class="comment">Great post!</div>
</section>
<footer>© 2024 Blog Author</footer>
</body>
</html>"""
result = extractor.extract(html)
# Blog content should be preserved
assert "Blog Post Title" in result.extracted
assert "interesting topic" in result.extracted
assert "small moments" in result.extracted
class TestBatchExtraction:
"""Tests for batch extraction."""
def test_extract_batch(self):
"""Tests batch extraction of multiple HTML pages."""
extractor = HTMLExtractor()
pages = [
(
"<html><body><article><p>Page one content.</p></article></body></html>",
"http://example.com/page1",
),
(
"<html><body><article><p>Page two content.</p></article></body></html>",
"http://example.com/page2",
),
(
"<html><body><article><p>Page three content.</p></article></body></html>",
None,
),
]
results = extractor.extract_batch(pages)
assert len(results) == 3
assert all(isinstance(r, HTMLExtractionResult) for r in results)
class TestContentDetectorIntegration:
"""Tests for integration with content_detector."""
def test_detector_identifies_html(self):
"""Tests that content_detector correctly identifies HTML."""
from headroom.transforms.content_detector import ContentType, detect_content_type
html = """<!DOCTYPE html>
<html>
<head><title>Test</title></head>
<body>
<div><p>Content</p></div>
</body>
</html>"""
result = detect_content_type(html)
assert result.content_type == ContentType.HTML
assert result.confidence >= 0.7
def test_detector_rejects_non_html(self):
"""Tests that content_detector doesn't misidentify non-HTML."""
from headroom.transforms.content_detector import ContentType, detect_content_type
# Plain text
result = detect_content_type("Just some plain text without HTML.")
assert result.content_type != ContentType.HTML
# JSON
result = detect_content_type('[{"id": 1}, {"id": 2}]')
assert result.content_type == ContentType.JSON_ARRAY
# Code (needs enough patterns to trigger detection)
code = """
import os
import sys
def hello():
print('world')
class Foo:
def __init__(self):
pass
if __name__ == '__main__':
hello()
"""
result = detect_content_type(code)
assert result.content_type == ContentType.SOURCE_CODE
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