With you current_user_can call everything is just fine. The problem lies elsewhere…
If you’ll take a look at Roles and Capabilities, you’ll see that there is no capability like edit_post. So your code is working correctly – admin can’t edit_post, because there is no such capability (unless it’s a custom capability registered by your code elsewhere).
But my gut tells me that you wanted to check if current user can edit_posts 😉