This is a testharness.js-based test.
Found 68 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] FontFace interface: attribute variationSettings
assert_true: The prototype object must have a property "variationSettings" expected true got false
[FAIL] FontFace interface: attribute features
assert_true: The prototype object must have a property "features" expected true got false
[FAIL] FontFace interface: attribute variations
assert_true: The prototype object must have a property "variations" expected true got false
[FAIL] FontFace interface: attribute palettes
assert_true: The prototype object must have a property "palettes" expected true got false
[FAIL] FontFace interface: fontFace must inherit property "variationSettings" with the proper type
assert_inherits: property "variationSettings" not found in prototype chain
[FAIL] FontFace interface: fontFace must inherit property "features" with the proper type
assert_inherits: property "features" not found in prototype chain
[FAIL] FontFace interface: fontFace must inherit property "variations" with the proper type
assert_inherits: property "variations" not found in prototype chain
[FAIL] FontFace interface: fontFace must inherit property "palettes" with the proper type
assert_inherits: property "palettes" not found in prototype chain
[FAIL] FontFaceFeatures interface: existence and properties of interface object
assert_own_property: self does not have own property "FontFaceFeatures" expected property "FontFaceFeatures" missing
[FAIL] FontFaceFeatures interface object length
assert_own_property: self does not have own property "FontFaceFeatures" expected property "FontFaceFeatures" missing
[FAIL] FontFaceFeatures interface object name
assert_own_property: self does not have own property "FontFaceFeatures" expected property "FontFaceFeatures" missing
[FAIL] FontFaceFeatures interface: existence and properties of interface prototype object
assert_own_property: self does not have own property "FontFaceFeatures" expected property "FontFaceFeatures" missing
[FAIL] FontFaceFeatures interface: existence and properties of interface prototype object's "constructor" property
assert_own_property: self does not have own property "FontFaceFeatures" expected property "FontFaceFeatures" missing
[FAIL] FontFaceFeatures interface: existence and properties of interface prototype object's @@unscopables property
assert_own_property: self does not have own property "FontFaceFeatures" expected property "FontFaceFeatures" missing
[FAIL] FontFaceVariationAxis interface: existence and properties of interface object
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface object length
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface object name
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: existence and properties of interface prototype object
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: existence and properties of interface prototype object's "constructor" property
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: existence and properties of interface prototype object's @@unscopables property
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: attribute name
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: attribute axisTag
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: attribute minimumValue
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: attribute maximumValue
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariationAxis interface: attribute defaultValue
assert_own_property: self does not have own property "FontFaceVariationAxis" expected property "FontFaceVariationAxis" missing
[FAIL] FontFaceVariations interface: existence and properties of interface object
assert_own_property: self does not have own property "FontFaceVariations" expected property "FontFaceVariations" missing
[FAIL] FontFaceVariations interface object length
assert_own_property: self does not have own property "FontFaceVariations" expected property "FontFaceVariations" missing
[FAIL] FontFaceVariations interface object name
assert_own_property: self does not have own property "FontFaceVariations" expected property "FontFaceVariations" missing
[FAIL] FontFaceVariations interface: existence and properties of interface prototype object
assert_own_property: self does not have own property "FontFaceVariations" expected property "FontFaceVariations" missing
[FAIL] FontFaceVariations interface: existence and properties of interface prototype object's "constructor" property
assert_own_property: self does not have own property "FontFaceVariations" expected property "FontFaceVariations" missing
[FAIL] FontFaceVariations interface: existence and properties of interface prototype object's @@unscopables property
assert_own_property: self does not have own property "FontFaceVariations" expected property "FontFaceVariations" missing
[FAIL] FontFaceVariations interface: setlike<FontFaceVariationAxis>
Cannot read properties of undefined (reading 'prototype')
[FAIL] FontFacePalette interface: existence and properties of interface object
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface object length
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface object name
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface: existence and properties of interface prototype object
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface: existence and properties of interface prototype object's "constructor" property
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface: existence and properties of interface prototype object's @@unscopables property
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface: iterable<DOMString>
Cannot read properties of undefined (reading 'prototype')
[FAIL] FontFacePalette interface: attribute length
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface: attribute usableWithLightBackground
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalette interface: attribute usableWithDarkBackground
assert_own_property: self does not have own property "FontFacePalette" expected property "FontFacePalette" missing
[FAIL] FontFacePalettes interface: existence and properties of interface object
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFacePalettes interface object length
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFacePalettes interface object name
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFacePalettes interface: existence and properties of interface prototype object
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFacePalettes interface: existence and properties of interface prototype object's "constructor" property
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFacePalettes interface: existence and properties of interface prototype object's @@unscopables property
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFacePalettes interface: iterable<FontFacePalette>
Cannot read properties of undefined (reading 'prototype')
[FAIL] FontFacePalettes interface: attribute length
assert_own_property: self does not have own property "FontFacePalettes" expected property "FontFacePalettes" missing
[FAIL] FontFaceSet interface: existence and properties of interface object
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface object length
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface object name
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: existence and properties of interface prototype object
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: existence and properties of interface prototype object's "constructor" property
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: existence and properties of interface prototype object's @@unscopables property
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: setlike<FontFace>
Cannot read properties of undefined (reading 'prototype')
[FAIL] FontFaceSet interface: operation add(FontFace)
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: operation delete(FontFace)
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: operation clear()
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: attribute onloading
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: attribute onloadingdone
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: attribute onloadingerror
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: operation load(CSSOMString, optional CSSOMString)
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: operation check(CSSOMString, optional CSSOMString)
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: attribute ready
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet interface: attribute status
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
[FAIL] FontFaceSet must be primary interface of document.fonts
assert_own_property: self does not have own property "FontFaceSet" expected property "FontFaceSet" missing
Harness: the test ran to completion.