This is a testharness.js-based test.
[FAIL] srcdoc history entries: the iframe itself navigates
assert_equals: srcdoc contents must be restored from history, not from the current value ('srcdoc2') of the content attribute expected "srcdoc1" but got "srcdoc2"
[FAIL] srcdoc history entries: the container window navigates
assert_equals: srcdoc contents must be restored from history, not from the current value of the (not-existing) content attribute expected (string) "srcdoc1" but got (undefined) undefined
Harness: the test ran to completion.