This is a testharness.js-based test.
Found 58 tests; 49 PASS, 9 FAIL, 0 TIMEOUT, 0 NOTRUN.
PASS idl_test setup
PASS idl_test validation
PASS ResizeObserverEntry creator
PASS Element includes ParentNode: member names are unique
PASS Element includes NonDocumentTypeChildNode: member names are unique
PASS Element includes ChildNode: member names are unique
PASS Element includes Slottable: member names are unique
PASS ResizeObserver interface: existence and properties of interface object
PASS ResizeObserver interface object length
PASS ResizeObserver interface object name
PASS ResizeObserver interface: existence and properties of interface prototype object
PASS ResizeObserver interface: existence and properties of interface prototype object's "constructor" property
PASS ResizeObserver interface: existence and properties of interface prototype object's @@unscopables property
PASS ResizeObserver interface: operation observe(Element, optional ResizeObserverOptions)
PASS ResizeObserver interface: operation unobserve(Element)
PASS ResizeObserver interface: operation disconnect()
PASS ResizeObserver must be primary interface of observer
PASS Stringification of observer
PASS ResizeObserver interface: observer must inherit property "observe(Element, optional ResizeObserverOptions)" with the proper type
PASS ResizeObserver interface: calling observe(Element, optional ResizeObserverOptions) on observer with too few arguments must throw TypeError
PASS ResizeObserver interface: observer must inherit property "unobserve(Element)" with the proper type
PASS ResizeObserver interface: calling unobserve(Element) on observer with too few arguments must throw TypeError
PASS ResizeObserver interface: observer must inherit property "disconnect()" with the proper type
PASS ResizeObserverEntry interface: existence and properties of interface object
PASS ResizeObserverEntry interface object length
PASS ResizeObserverEntry interface object name
PASS ResizeObserverEntry interface: existence and properties of interface prototype object
PASS ResizeObserverEntry interface: existence and properties of interface prototype object's "constructor" property
PASS ResizeObserverEntry interface: existence and properties of interface prototype object's @@unscopables property
PASS ResizeObserverEntry interface: attribute target
PASS ResizeObserverEntry interface: attribute contentRect
PASS ResizeObserverEntry interface: attribute borderBoxSize
PASS ResizeObserverEntry interface: attribute contentBoxSize
PASS ResizeObserverEntry interface: attribute devicePixelContentBoxSize
PASS ResizeObserverEntry must be primary interface of entry
PASS Stringification of entry
PASS ResizeObserverEntry interface: entry must inherit property "target" with the proper type
PASS ResizeObserverEntry interface: entry must inherit property "contentRect" with the proper type
PASS ResizeObserverEntry interface: entry must inherit property "borderBoxSize" with the proper type
PASS ResizeObserverEntry interface: entry must inherit property "contentBoxSize" with the proper type
PASS ResizeObserverEntry interface: entry must inherit property "devicePixelContentBoxSize" with the proper type
PASS ResizeObserverSize interface: existence and properties of interface object
PASS ResizeObserverSize interface object length
PASS ResizeObserverSize interface object name
PASS ResizeObserverSize interface: existence and properties of interface prototype object
PASS ResizeObserverSize interface: existence and properties of interface prototype object's "constructor" property
PASS ResizeObserverSize interface: existence and properties of interface prototype object's @@unscopables property
PASS ResizeObserverSize interface: attribute inlineSize
PASS ResizeObserverSize interface: attribute blockSize
FAIL ResizeObservation interface: existence and properties of interface object assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface object length assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface object name assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface: existence and properties of interface prototype object assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface: existence and properties of interface prototype object's "constructor" property assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface: existence and properties of interface prototype object's @@unscopables property assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface: attribute target assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface: attribute observedBox assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
FAIL ResizeObservation interface: attribute lastReportedSizes assert_own_property: self does not have own property "ResizeObservation" expected property "ResizeObservation" missing
Harness: the test ran to completion.