This test checks the SVGAnimatedBoolean API - utilizing the externalResourcesRequired property of SVGRectElement On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Check initial SVGExternalResourcesRequired value PASS rectElement.externalResourcesRequired.baseVal is false Set value to true PASS rectElement.externalResourcesRequired.baseVal = true is true Caching baseVal in local variable PASS baseVal is true Modify local baseVal variable to true PASS baseVal = false is false Assure that rectElement.externalResourcesRequired has not been changed, but the local baseVal variable PASS baseVal is false PASS rectElement.externalResourcesRequired.baseVal is true Check assigning values of various types PASS rectElement.externalResourcesRequired.baseVal = rectElement.externalResourcesRequired is rectElement.externalResourcesRequired PASS rectElement.externalResourcesRequired.baseVal is true PASS rectElement.externalResourcesRequired.baseVal = null is null PASS rectElement.externalResourcesRequired.baseVal is false PASS rectElement.externalResourcesRequired.baseVal = 'aString' is 'aString' PASS rectElement.externalResourcesRequired.baseVal is true PASS rectElement.externalResourcesRequired.baseVal = rectElement is rectElement PASS rectElement.externalResourcesRequired.baseVal is true PASS successfullyParsed is true TEST COMPLETE