Add Layout 2020 reftests regression report

This shows WPT reftests that fail in Servo with Layout 2020 but pass with Layout 2013, together with screenshots of the corresponding runs and HTML source code for the test and its reference. https://community-tc.services.mozilla.com/api/index/v1/task/project.servo.layout-2020-regressions-report/artifacts/public/regressions.html redirects to the latest report for the `master` branch.
servo · Mar 20, 2020 · 44c7241 · 44c7241
1 parent 95cd67b
commit 44c7241
Show file tree

Hide file tree

Showing 5 changed files with 307 additions and 0 deletions.
diff --git a/.gitignore b/.gitignore
@@ -6,6 +6,7 @@
 /.vs
 /android-toolchains
 /target
+/etc/layout-2020-regressions/regressions.html
 /ports/android/bin
 /ports/android/libs
 /ports/android/local.properties

diff --git a/etc/layout-2020-regressions/gen.py b/etc/layout-2020-regressions/gen.py
@@ -0,0 +1,142 @@
+#!/usr/bin/env python
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+import json
+import os
+import re
+import sys
+import urllib.request
+from html import escape as html_escape
+
+
+TASKCLUSTER_ROOT_URL = "https://community-tc.services.mozilla.com"
+
+
+def fetch(url):
+    url = TASKCLUSTER_ROOT_URL + "/api/" + url
+    print("Fetching " + url)
+    response = urllib.request.urlopen(url)
+    assert response.getcode() == 200
+    return response
+
+
+def fetch_json(url):
+    with fetch(url) as response:
+        return json.load(response)
+
+
+def task(platform, chunk, key):
+    return "index/v1/task/project.servo.%s_wpt_%s.%s" % (platform, chunk, key)
+
+
+def failing_reftests(platform, key):
+    chunk_1_task_id = fetch_json(task(platform, 1, key))["taskId"]
+    name = fetch_json("queue/v1/task/" + chunk_1_task_id)["metadata"]["name"]
+    match = re.search("WPT chunk (\d+) / (\d+)", name)
+    assert match.group(1) == "1"
+    total_chunks = int(match.group(2))
+
+    for chunk in range(1, total_chunks + 1):
+        with fetch(task(platform, chunk, key) + "/artifacts/public/test-wpt.log") as response:
+            for line in response:
+                message = json.loads(line)
+                if message.get("status") not in {None, "OK", "PASS"}:
+                    screenshots = message.get("extra", {}).get("reftest_screenshots")
+                    if screenshots:
+                        yield message["test"], screenshots
+
+
+def main(index_key, commit_sha):
+    failures_2013 = {url for url, _ in failing_reftests("linux_x64", index_key)}
+    failures_2020 = Directory()
+    for url, screenshots in failing_reftests("linux_x64_2020", index_key):
+        if url not in failures_2013:
+            assert url.startswith("/")
+            failures_2020.add(url[1:], screenshots)
+
+    here = os.path.dirname(__file__)
+    with open(os.path.join(here, "prism.js")) as f:
+        prism_js = f.read()
+    with open(os.path.join(here, "prism.css")) as f:
+        prism_css = f.read()
+    with open(os.path.join(here, "regressions.html"), "w", encoding="utf-8") as html:
+        os.chdir(os.path.join(here, "../../tests/wpt"))
+        html.write("""
+            <!doctype html>
+            <meta charset=utf-8>
+            <title>Layout 2020 regressions</title>
+            <link rel=stylesheet href=prism.css>
+            <style>
+                ul { padding-left: 1em }
+                li { list-style: "⯈ " }
+                li.expanded { list-style: "⯆ " }
+                li:not(.expanded) > ul, li:not(.expanded) > div { display: none }
+                li > div { display: grid; grid-gap: 1em; grid-template-columns: 1fr 1fr }
+                li > div > p { grid-column: span 2 }
+                li > div > img { grid-row: 2; width: 300px; box-shadow: 0 0 10px }
+                li > div > img:hover { transform: scale(3); transform-origin: 0 0 }
+                li > div > pre { grid-row: 3; font-size: 12px !important }
+                pre code { white-space: pre-wrap !important }
+                %s
+            </style>
+            <h1>Layout 2020 regressions in tree <code>%s</code></h1>
+        """ % (prism_css, commit_sha))
+        failures_2020.write(html)
+        html.write("""
+            <script>
+                for (let li of document.getElementsByTagName("li")) {
+                    li.addEventListener('click', event => {
+                        li.classList.toggle("expanded")
+                        event.stopPropagation()
+                    })
+                }
+                %s
+            </script>
+        """ % prism_js)
+
+
+class Directory:
+    def __init__(self):
+        self.count = 0
+        self.contents = {}
+
+    def add(self, path, screenshots):
+        self.count += 1
+        first, _, rest = path.partition("/")
+        if rest:
+            self.contents.setdefault(first, Directory()).add(rest, screenshots)
+        else:
+            assert path not in self.contents
+            self.contents[path] = screenshots
+
+    def write(self, html):
+        html.write("<ul>\n")
+        for k, v in self.contents.items():
+            html.write("<li><code>%s</code>\n" % k)
+            if isinstance(v, Directory):
+                html.write("<strong>%s</strong>\n" % v.count)
+                v.write(html)
+            else:
+                a, rel, b = v
+                html.write("<div>\n<p><code>%s</code> %s <code>%s</code></p>\n"
+                           % (a["url"], rel, b["url"]))
+                for side in [a, b]:
+                    html.write("<img src='data:image/png;base64,%s'>\n" % side["screenshot"])
+                    url = side["url"]
+                    prefix = "/_mozilla/"
+                    if url.startswith(prefix):
+                        filename = "mozilla/tests/" + url[len(prefix):]
+                    else:
+                        filename = "web-platform-tests" + url
+                    with open(filename, encoding="utf-8") as f:
+                        src = html_escape(f.read())
+                        html.write("<pre><code class=language-html>%s</code></pre>\n" % src)
+            html.write("</li>\n")
+        html.write("</ul>\n")
+
+
+if __name__ == "__main__":
+    sys.exit(main(*sys.argv[1:]))
diff --git a/etc/layout-2020-regressions/prism.css b/etc/layout-2020-regressions/prism.css
@@ -0,0 +1,141 @@
+/* PrismJS 1.19.0
+https://prismjs.com/download.html#themes=prism&languages=markup+css+clike+javascript */
+/**
+ * prism.js default theme for JavaScript, CSS and HTML
+ * Based on dabblet (http://dabblet.com)
+ * @author Lea Verou
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: black;
+	background: none;
+	text-shadow: 0 1px white;
+	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+	font-size: 1em;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+pre[class*="language-"]::-moz-selection, pre[class*="language-"] ::-moz-selection,
+code[class*="language-"]::-moz-selection, code[class*="language-"] ::-moz-selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+pre[class*="language-"]::selection, pre[class*="language-"] ::selection,
+code[class*="language-"]::selection, code[class*="language-"] ::selection {
+	text-shadow: none;
+	background: #b3d4fc;
+}
+
+@media print {
+	code[class*="language-"],
+	pre[class*="language-"] {
+		text-shadow: none;
+	}
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+}
+
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background: #f5f2f0;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .1em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+.token.comment,
+.token.prolog,
+.token.doctype,
+.token.cdata {
+	color: slategray;
+}
+
+.token.punctuation {
+	color: #999;
+}
+
+.token.namespace {
+	opacity: .7;
+}
+
+.token.property,
+.token.tag,
+.token.boolean,
+.token.number,
+.token.constant,
+.token.symbol,
+.token.deleted {
+	color: #905;
+}
+
+.token.selector,
+.token.attr-name,
+.token.string,
+.token.char,
+.token.builtin,
+.token.inserted {
+	color: #690;
+}
+
+.token.operator,
+.token.entity,
+.token.url,
+.language-css .token.string,
+.style .token.string {
+	color: #9a6e3a;
+	background: hsla(0, 0%, 100%, .5);
+}
+
+.token.atrule,
+.token.attr-value,
+.token.keyword {
+	color: #07a;
+}
+
+.token.function,
+.token.class-name {
+	color: #DD4A68;
+}
+
+.token.regex,
+.token.important,
+.token.variable {
+	color: #e90;
+}
+
+.token.important,
+.token.bold {
+	font-weight: bold;
+}
+.token.italic {
+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}