This is a testharness.js-based test.
Found 34 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] TextTrack interface: attribute inBandMetadataTrackDispatchType
assert_true: The prototype object must have a property "inBandMetadataTrackDispatchType" expected true got false
[FAIL] TextTrack interface: document.createElement("track").track must inherit property "inBandMetadataTrackDispatchType" with the proper type
assert_inherits: property "inBandMetadataTrackDispatchType" not found in prototype chain
[FAIL] ImageData interface: new ImageData(10, 10) must inherit property "data" with the proper type
assert_inherits: property "data" found on object expected in prototype chain
[FAIL] CustomElementRegistry interface: existence and properties of interface object
assert_throws_js: interface object didn't throw TypeError when called as a constructor function "function() {\n new interface_object();\n }" did not throw
[FAIL] ElementInternals interface: operation setValidity(optional ValidityStateFlags, optional DOMString, optional HTMLElement)
assert_equals: property has wrong .length expected 0 but got 1
[FAIL] VisibilityStateEntry interface: attribute name
assert_own_property: expected property "name" missing
[FAIL] VisibilityStateEntry interface: attribute entryType
assert_own_property: expected property "entryType" missing
[FAIL] VisibilityStateEntry interface: attribute startTime
assert_own_property: expected property "startTime" missing
[FAIL] VisibilityStateEntry interface: attribute duration
assert_own_property: expected property "duration" missing
[FAIL] Location interface: stringifier
assert_own_property: interface prototype object missing non-static operation expected property "toString" missing
[FAIL] PromiseRejectionEvent interface: attribute promise
assert_throws_js: getting property on prototype object must throw TypeError function "function () { [native code] }" did not throw
[FAIL] Navigator interface: operation taintEnabled()
assert_own_property: interface prototype object missing non-static operation expected property "taintEnabled" missing
[FAIL] Navigator interface: attribute oscpu
assert_true: The prototype object must have a property "oscpu" expected true got false
[FAIL] Navigator interface: window.navigator must inherit property "taintEnabled()" with the proper type
assert_inherits: property "taintEnabled" not found in prototype chain
[FAIL] Navigator interface: window.navigator must inherit property "oscpu" with the proper type
assert_inherits: property "oscpu" not found in prototype chain
[FAIL] Worker interface: attribute onmessageerror
assert_true: The prototype object must have a property "onmessageerror" expected true got false
[FAIL] SVGSVGElement interface: attribute onafterprint
assert_true: The prototype object must have a property "onafterprint" expected true got false
[FAIL] SVGSVGElement interface: attribute onbeforeprint
assert_true: The prototype object must have a property "onbeforeprint" expected true got false
[FAIL] SVGSVGElement interface: attribute onbeforeunload
assert_true: The prototype object must have a property "onbeforeunload" expected true got false
[FAIL] SVGSVGElement interface: attribute onhashchange
assert_true: The prototype object must have a property "onhashchange" expected true got false
[FAIL] SVGSVGElement interface: attribute onlanguagechange
assert_true: The prototype object must have a property "onlanguagechange" expected true got false
[FAIL] SVGSVGElement interface: attribute onmessage
assert_true: The prototype object must have a property "onmessage" expected true got false
[FAIL] SVGSVGElement interface: attribute onmessageerror
assert_true: The prototype object must have a property "onmessageerror" expected true got false
[FAIL] SVGSVGElement interface: attribute onoffline
assert_true: The prototype object must have a property "onoffline" expected true got false
[FAIL] SVGSVGElement interface: attribute ononline
assert_true: The prototype object must have a property "ononline" expected true got false
[FAIL] SVGSVGElement interface: attribute onpagehide
assert_true: The prototype object must have a property "onpagehide" expected true got false
[FAIL] SVGSVGElement interface: attribute onpagereveal
assert_true: The prototype object must have a property "onpagereveal" expected true got false
[FAIL] SVGSVGElement interface: attribute onpageshow
assert_true: The prototype object must have a property "onpageshow" expected true got false
[FAIL] SVGSVGElement interface: attribute onpageswap
assert_true: The prototype object must have a property "onpageswap" expected true got false
[FAIL] SVGSVGElement interface: attribute onpopstate
assert_true: The prototype object must have a property "onpopstate" expected true got false
[FAIL] SVGSVGElement interface: attribute onrejectionhandled
assert_true: The prototype object must have a property "onrejectionhandled" expected true got false
[FAIL] SVGSVGElement interface: attribute onstorage
assert_true: The prototype object must have a property "onstorage" expected true got false
[FAIL] SVGSVGElement interface: attribute onunhandledrejection
assert_true: The prototype object must have a property "onunhandledrejection" expected true got false
[FAIL] SVGSVGElement interface: attribute onunload
assert_true: The prototype object must have a property "onunload" expected true got false
Harness: the test ran to completion.