Edge of the City is a 1957 American FILM NOlR drama film directed by Martin Ritt in his directorial debut, and starring John Cassavetes and Sidney Poitier.
The film was considered unusual for its time because of its portrayal of an interracial friendship, and was praised by representatives of the NAACP, Urban League, American Jewish Committee and Interfaith Council because of its portrayal of racial brotherhood.
You can find out more about this movie from Wikipedia.