pub fn stage<A: ResourceApp>(
harness: &mut FrameHarness,
scenario: Option<&str>,
) -> Result<(), LaunchError>Expand description
Stage scenario (None for a plain --shots) on a running A: apply
its resource actions through the host’s door, then let its views and
surfaces stage their view state, and run the frames that settles.
§Errors
Returns the host’s refusal of a scenario action, or an error when the
harness does not host A.