Bug 1529726 [wpt PR 15414] - HTML: window.length and named access, a=…

…testonly

Automatic update from web-platform-tests
HTML: window.length and named access

For whatwg/html#4368.

--

wpt-commits: 3a43f99a56a4c016e3f1cda41330f1a2c0e780ff
wpt-pr: 15414

UltraBlame original commit: 8566ae4d152605453ebe6715ec4f2f8af60a95d3

testing/web-platform/tests/html/browsers/the-window-object/length-attribute.window.js

@@ -0,0 +1,243 @@
+async_test
+(
+t
+=
+>
+{
+const
+frame
+=
+document
+.
+createElement
+(
+"
+iframe
+"
+)
+;
+frame
+.
+srcdoc
+=
+"
+<
+iframe
+name
+=
+x
+srcdoc
+=
+'
+<
+iframe
+name
+=
+z
+>
+<
+/
+iframe
+>
+'
+>
+<
+/
+iframe
+>
+<
+iframe
+name
+=
+y
+>
+<
+/
+iframe
+>
+"
+;
+frame
+.
+onload
+=
+t
+.
+step_func_done
+(
+(
+)
+=
+>
+{
+const
+frameW
+=
+frame
+.
+contentWindow
+;
+assert_equals
+(
+frameW
+.
+length
+2
+)
+;
+assert_not_equals
+(
+frameW
+.
+x
+undefined
+)
+;
+assert_not_equals
+(
+frameW
+.
+y
+undefined
+)
+;
+assert_equals
+(
+frameW
+.
+z
+undefined
+)
+;
+assert_equals
+(
+frameW
+.
+x
+frameW
+[
+0
+]
+)
+;
+assert_equals
+(
+frameW
+.
+y
+frameW
+[
+1
+]
+)
+;
+const
+xFrameW
+=
+frameW
+.
+x
+;
+assert_equals
+(
+xFrameW
+.
+length
+1
+)
+;
+assert_not_equals
+(
+xFrameW
+.
+z
+undefined
+)
+;
+assert_equals
+(
+xFrameW
+.
+z
+xFrameW
+[
+0
+]
+)
+;
+frame
+.
+remove
+(
+)
+;
+assert_equals
+(
+frameW
+.
+length
+0
+)
+;
+assert_equals
+(
+frameW
+.
+x
+undefined
+)
+;
+assert_equals
+(
+frameW
+[
+0
+]
+undefined
+)
+;
+assert_equals
+(
+xFrameW
+.
+length
+0
+)
+;
+assert_equals
+(
+xFrameW
+.
+z
+undefined
+)
+;
+}
+)
+;
+document
+.
+body
+.
+append
+(
+frame
+)
+;
+}
+"
+Window
+object
+'
+s
+length
+IDL
+attribute
+(
+and
+named
+access
+)
+"
+)
+;