I have few widgets under test and their super constructor doesn't gets called (some it works fine and for others it won't work as expected after many different tries)
line coverage - super(key: key) shows in RED for coverage.
Attaching few images for references..
Not working as expected
--
Working as expected
This is expected behavior.
Source: https://github.com/dart-lang/sdk/issues/38934#issuecomment-803938315