As a violinist and a pianist, I have over 10 years of semi-professional experience in both instruments (currently not a professional), and have previously played in various performance roles in both instruments.
Violins have different sets of temperaments to work with, and change based on skill level and who they play with.
Equal Temperaments will cause the violin to sound bland, because the notes
no longer cause harmonic vibrations with the other strings. Expressive Intonation is the opposite, where the violinist plays according to the harmonics of their instrument, but this pushes the intervals of the scale outside of equal temperaments.
A high level violin soloist will play Expressive Intonation when appropriate. The semi-tone between 3rd note and 4th note will be wider than the semi-tone between the 7th note and 8th note, creating harmonics with the other strings and making it sound much richer. If you have a chance to listen to this, a scale sounds noticeably better when done in Expressive Intonation, but by and large very few modern instrument can do this, and it's simply impractical to bring back instruments that are "perfectly" tuned.
With regards to adjusting their pitch, a violinist does this by ear. Given that a violinist would know how to adjust their notes as necessary based on what key the piece in, it is part of a violinist's skill set to adjust his pitch, literally, on the fly.
A violinist will also change the fingering to avoid open strings, since you can't adjust an open string's pitch, and also will shift to higher positions as needed. There are no hard and fast rule, but it generally has to do with making the piece easier to play and to sound better.
A violinist that lacks experience with accompaniment will incorrectly play Expressive Intonation with other instruments, causing rather unpleasant sounds. It is primarily the violinist's job to learn how to play "in tune" with other instruments because very few instruments can adjust their pitch as readily as a string instrument.
So to answer your question, "Yes, the violin will imitate equal temperament", but the process is largely organic and does not follow hard-and-fast rules. The process of the violinist imitating equal temperament should be a subset of the regularly used skill of adjusting their pitch according to the key they are in.
You won't find any violinist sitting with a pitch machine and practicing with that, because that's not how music works.