How about another angle on the Meeke testing Toyota rumors.

Why should Toyota offer/let him test?

1. So that he can find out if Toyota is good => nope, clearly it's good when it has most rally and stage wins in the season.
2. So that he can find out if Toyota suits him => while you can find that out in short test you can never test all possible settings or use different diffs etc.

Common background for 1. and 2.: Meeke is in no position to demand a test before signing.

Turning it around, if Toyota wants to "test" Meeke:
3. To find out if Meeke is fast => He has been driving for so long that he has shown he can be fast multiple times. It's keeping it on the road that is a problem, can't test that.
4. To find out how good Meeke is setting up a car => Two things here, a) he has been around for so long that if he is very good or very bad they would know already trough gossip, b) Judging by C3 experience setting up the car for test and for rally is a different thing.

For these reasons I find it quite unlikely there was a test. Only remaining credible option is they would let him test (semi-secret) to put more pressure on Lappi or Latvala to sign.