Bug 1523562 [wpt PR 15047] - Reland add tentative WPT tests for stale…

… while revalidate handling., a=testonly

Automatic update from web-platform-tests
Reland add tentative WPT tests for stale while revalidate handling.

Add test to ensure that handling the fetch doesn't trigger stale
while revalidate loading.

Add test to ensure that scripts and css loaded trigger a stale
while revalidate cache hit.

The PR for the spec changes is here:
whatwg/fetch#853

This reland removes the resource timing and moves to css (instead of
images) which were both unreliable.

BUG=348877

Change-Id: Ibabd8d3fd0295bedc8259594fc926da6ab5cfc43
Reviewed-on: https://chromium-review.googlesource.com/c/1434776
Commit-Queue: Dave Tapuska <dtapuskachromium.org>
Reviewed-by: Ben Kelly <wanderviewchromium.org>
Cr-Commit-Position: refs/heads/master{#626264}

--

wpt-commits: f8a34bc8fa3a9451717c974108d677e319243ded
wpt-pr: 15047

UltraBlame original commit: 53cc2cd5c20c298cc1d7b855d0053fe58856bc10

testing/web-platform/tests/fetch/stale-while-revalidate/fetch.tentative.html

@@ -0,0 +1,171 @@
+<
+!
+DOCTYPE
+html
+>
+<
+!
+-
+-
+-
+Tentative
+test
+against
+:
+https
+:
+/
+/
+github
+.
+com
+/
+whatwg
+/
+fetch
+/
+pull
+/
+853
+-
+-
+>
+<
+meta
+charset
+=
+"
+utf
+-
+8
+"
+>
+<
+title
+>
+Tests
+Stale
+While
+Revalidate
+is
+not
+executed
+for
+fetch
+API
+<
+/
+title
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharness
+.
+js
+"
+>
+<
+/
+script
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharnessreport
+.
+js
+"
+>
+<
+/
+script
+>
+<
+script
+>
+promise_test
+(
+async
+(
+test
+)
+=
+>
+{
+const
+response
+=
+await
+fetch
+(
+stale
+-
+script
+.
+py
+)
+;
+const
+response2
+=
+await
+fetch
+(
+stale
+-
+script
+.
+py
+)
+;
+assert_not_equals
+(
+response
+.
+headers
+.
+get
+(
+'
+Token
+'
+)
+response2
+.
+headers
+.
+get
+(
+'
+Token
+'
+)
+)
+;
+}
+'
+Second
+fetch
+does
+not
+return
+same
+response
+'
+)
+;
+<
+/
+script
+>

testing/web-platform/tests/fetch/stale-while-revalidate/stale-css.py

@@ -0,0 +1,192 @@
+def
+main
+(
+request
+response
+)
+:
+
+cookie
+=
+request
+.
+cookies
+.
+first
+(
+"
+Count
+"
+None
+)
+
+count
+=
+0
+
+if
+cookie
+!
+=
+None
+:
+
+count
+=
+int
+(
+cookie
+.
+value
+)
+
+if
+request
+.
+GET
+.
+first
+(
+"
+query
+"
+None
+)
+!
+=
+None
+:
+
+headers
+=
+[
+(
+"
+Count
+"
+count
+)
+]
+
+content
+=
+"
+"
+
+return
+200
+headers
+content
+
+else
+:
+
+count
+=
+count
++
+1
+
+content
+=
+"
+body
+{
+background
+:
+rgb
+(
+0
+128
+0
+)
+;
+}
+"
+
+if
+count
+>
+1
+:
+
+content
+=
+"
+body
+{
+background
+:
+rgb
+(
+255
+0
+0
+)
+;
+}
+"
+
+headers
+=
+[
+(
+"
+Content
+-
+Type
+"
+"
+text
+/
+css
+"
+)
+
+(
+"
+Set
+-
+Cookie
+"
+"
+Count
+=
+{
+}
+"
+.
+format
+(
+count
+)
+)
+
+(
+"
+Cache
+-
+Control
+"
+"
+private
+max
+-
+age
+=
+0
+stale
+-
+while
+-
+revalidate
+=
+10
+"
+)
+]
+
+return
+200
+headers
+content