The Bechdel-Wallace test (definition from Geek Feminism) or Mo Movie Measure (often simply Bechdel test) is a media test which was developed by Liz Wallace and became widely known after Alison Bechdel featured it in her comic Dykes to Watch Out For, where the character Mo explains that she refuses to watch any film that doesn’t fulfil this short set of conditions:
the movie [media] has at least two women characters;
who talk to each other;
about something other than a man
It doesn’t mean that the things is good by default or anything, so a good film may not pass the test while a brutal book may. It’s just an indication of the role of women in the media.