250 lines
9.3 KiB
Python
250 lines
9.3 KiB
Python
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"""Tests for diff logic and scoring."""
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import pytest
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from scanner.differ import (
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compare_snapshots,
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diff_link_set,
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diff_metadata,
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diff_text,
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normalize_text,
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score_diff,
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text_hash,
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)
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BASE_CFG = {
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"scoring": {
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"new_external_domain": 50,
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"new_internal_url": 30,
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"missing_internal_url": 20,
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"hidden_content": 40,
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"unexpected_canonical": 35,
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"meta_refresh": 40,
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"unexpected_jsonld": 35,
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"large_text_addition": 20,
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"new_inline_script_suspicious": 30,
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"comment_links": 25,
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"noscript_links": 25,
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"missing_security_header": 5,
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"suspicious_content_pattern": 50,
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},
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"thresholds": {"yellow": 20, "red": 60, "large_text_block_chars": 200},
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"normalization": {"collapse_whitespace": True, "ignore_patterns": []},
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}
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class TestNormalizeText:
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def test_collapses_whitespace(self):
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result = normalize_text("Hello World\n\nFoo", BASE_CFG)
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assert result == "Hello World Foo"
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def test_applies_ignore_patterns(self):
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cfg = dict(BASE_CFG)
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cfg["normalization"] = {
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"collapse_whitespace": True,
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"ignore_patterns": [r"\d{2}\.\d{2}\.\d{4}"],
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}
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result = normalize_text("Stand: 12.06.2026 Text", cfg)
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assert "[IGNORED]" in result
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assert "12.06.2026" not in result
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class TestDiffText:
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def test_identical_texts_produce_empty_diff(self):
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assert diff_text("Hello", "Hello") == []
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def test_addition_shows_plus_line(self):
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lines = diff_text("Hello", "Hello\nWorld")
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assert any(l.startswith("+") and "World" in l for l in lines)
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def test_removal_shows_minus_line(self):
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lines = diff_text("Hello\nWorld", "Hello")
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assert any(l.startswith("-") and "World" in l for l in lines)
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class TestDiffLinkSet:
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def test_detects_added_link(self):
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old = [{"url": "https://example.com/a"}]
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new = [{"url": "https://example.com/a"}, {"url": "https://example.com/b"}]
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result = diff_link_set(old, new)
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assert "https://example.com/b" in result["added"]
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assert result["removed"] == []
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def test_detects_removed_link(self):
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old = [{"url": "https://example.com/a"}, {"url": "https://example.com/b"}]
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new = [{"url": "https://example.com/a"}]
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result = diff_link_set(old, new)
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assert "https://example.com/b" in result["removed"]
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def test_no_change(self):
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links = [{"url": "https://example.com/a"}]
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result = diff_link_set(links, links)
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assert result == {"added": [], "removed": []}
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class TestDiffMetadata:
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def test_detects_title_change(self):
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old = {"title": "Alte Seite", "h1": [], "h2": []}
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new = {"title": "Neue Seite", "h1": [], "h2": []}
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result = diff_metadata(old, new)
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assert "title" in result
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assert result["title"]["old"] == "Alte Seite"
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def test_no_change(self):
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meta = {"title": "Seite", "description": "Desc", "h1": [], "h2": []}
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assert diff_metadata(meta, meta) == {}
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def test_detects_canonical_change(self):
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old = {"canonical": "https://bredelar.info/", "h1": [], "h2": []}
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new = {"canonical": "https://spam.example.com/", "h1": [], "h2": []}
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result = diff_metadata(old, new)
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assert "canonical" in result
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class TestCompareSnapshots:
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def _make_page(self, url, text="Inhalt", links=None, hidden=None):
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return {
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"url": url,
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"text": text,
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"links": links or {"a": [], "script": [], "iframe": [], "link_rel": [], "form": [], "meta_refresh": [], "canonical": None},
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"metadata": {"title": "T", "h1": [], "h2": []},
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"hidden_content": hidden or [],
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"inline_scripts": [],
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"jsonld": [],
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"comment_links": [],
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}
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def test_new_url_detected(self):
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baseline = {"https://b.info/": self._make_page("https://b.info/")}
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current = {
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"https://b.info/": self._make_page("https://b.info/"),
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"https://b.info/new/": self._make_page("https://b.info/new/"),
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}
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result = compare_snapshots(baseline, current, BASE_CFG)
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assert "https://b.info/new/" in result["new_internal_urls"]
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def test_missing_url_detected(self):
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baseline = {
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"https://b.info/": self._make_page("https://b.info/"),
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"https://b.info/old/": self._make_page("https://b.info/old/"),
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}
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current = {"https://b.info/": self._make_page("https://b.info/")}
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result = compare_snapshots(baseline, current, BASE_CFG)
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assert "https://b.info/old/" in result["missing_internal_urls"]
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def test_unchanged_page_not_in_diffs(self):
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page = self._make_page("https://b.info/", "Gleicher Inhalt")
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result = compare_snapshots({"https://b.info/": page}, {"https://b.info/": page}, BASE_CFG)
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assert result["changed_pages"] == 0
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def test_text_change_detected(self):
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old = self._make_page("https://b.info/", "Alter Text")
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new = self._make_page("https://b.info/", "Alter Text plus neuer Spam-Block im SEO-Kontext")
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result = compare_snapshots({"https://b.info/": old}, {"https://b.info/": new}, BASE_CFG)
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assert result["changed_pages"] == 1
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def test_new_external_domain_detected(self):
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def _page_with_ext(url, ext_url):
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p = self._make_page(url)
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p["links"]["a"] = [{"url": ext_url, "class": "external", "text": "x", "rel": ""}]
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return p
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baseline = {"https://b.info/": self._make_page("https://b.info/")}
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current = {"https://b.info/": _page_with_ext("https://b.info/", "https://spam.example.com/")}
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result = compare_snapshots(baseline, current, BASE_CFG)
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assert "spam.example.com" in result["new_external_domains"]
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class TestScoreDiff:
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def test_green_for_no_changes(self):
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result = score_diff({
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"new_internal_urls": [],
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"missing_internal_urls": [],
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"new_external_domains": [],
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"page_diffs": [],
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"new_pages_analysis": [],
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}, BASE_CFG)
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assert result["level"] == "green"
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assert result["exit_code"] == 0
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def test_yellow_for_new_url(self):
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result = score_diff({
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"new_internal_urls": ["https://b.info/new/"],
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"missing_internal_urls": [],
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"new_external_domains": [],
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"page_diffs": [],
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"new_pages_analysis": [],
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}, BASE_CFG)
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assert result["level"] == "yellow"
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assert result["exit_code"] == 1
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def test_yellow_for_single_new_external_domain(self):
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# One new external domain = 50 pts → yellow (red threshold is 60)
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result = score_diff({
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"new_internal_urls": [],
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"missing_internal_urls": [],
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"new_external_domains": ["pharmacy.example.com"],
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"page_diffs": [],
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"new_pages_analysis": [],
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}, BASE_CFG)
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assert result["level"] == "yellow"
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assert result["exit_code"] == 1
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def test_red_for_new_external_domain_plus_hidden_content(self):
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# External domain (50) + hidden content (40) = 90 pts → red
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result = score_diff({
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"new_internal_urls": [],
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"missing_internal_urls": [],
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"new_external_domains": ["pharmacy.example.com"],
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"page_diffs": [{
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"url": "https://b.info/",
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"text_diff": [],
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"added_chars": 0,
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"link_diff": {},
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"meta_diff": {},
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"new_hidden_content": [{"type": "inline_style_hidden", "indicators": ["display:none"]}],
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"new_inline_scripts": [],
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"new_jsonld": [],
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"new_meta_refresh": [],
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"canonical_changed": False,
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"new_comment_links": [],
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"old_canonical": None,
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"new_canonical": None,
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}],
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"new_pages_analysis": [],
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}, BASE_CFG)
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assert result["level"] == "red"
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assert result["exit_code"] == 2
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def test_yellow_for_hidden_content_alone(self):
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# One hidden content finding = 40 pts → yellow (below red threshold of 60)
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result = score_diff({
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"new_internal_urls": [],
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"missing_internal_urls": [],
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"new_external_domains": [],
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"page_diffs": [{
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"url": "https://b.info/",
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"text_diff": [],
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"added_chars": 0,
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"link_diff": {},
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"meta_diff": {},
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"new_hidden_content": [{"type": "inline_style_hidden", "indicators": ["display:none"]}],
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"new_inline_scripts": [],
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"new_jsonld": [],
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"new_meta_refresh": [],
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"canonical_changed": False,
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"new_comment_links": [],
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"old_canonical": None,
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"new_canonical": None,
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}],
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"new_pages_analysis": [],
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}, BASE_CFG)
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assert result["level"] == "yellow"
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def test_reasons_include_domain(self):
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result = score_diff({
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"new_internal_urls": [],
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"missing_internal_urls": [],
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"new_external_domains": ["spam.com"],
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"page_diffs": [],
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"new_pages_analysis": [],
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}, BASE_CFG)
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assert any("spam.com" in r for r in result["reasons"])
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