Test setting the hostname attribute of the URL in HTMLAnchorElement. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Basic test PASS a.href is 'https://www.otherdomain.com:8080/path/' Extra slashes before hostname PASS a.href is 'https://www.mydomain.com:8080/path/' Set hostname to URL with foo: protocol FAIL a.href should be foo://www.otherdomain.com/path/. Was foo://www.mydomain.com/path/. Set hostname to null PASS a.href is 'https://null:8080/path/' Set hostname to empty string PASS a.href is 'https://www.mydomain.com:8080/path/' Set hostname to URL with 2 colons PASS a.href is 'really:bad:url' Set a hostname that contains space in it FAIL a.href should be http://www.my domain.com/path/. Was http://www.other%20domain.com/path/. Set hostname on a local file FAIL a.href should be file://a/C:/path/testurl.html. Was c:/path/testurl.html. Set hostname to 'localhost' on a local file FAIL a.href should be file:///C:/path/testurl.html. Was c:/path/testurl.html. Set hostname to undefined PASS a.href is 'https://undefined:8080/path/' PASS successfullyParsed is true TEST COMPLETE