test compute_grid_info()

[simonpcouch]

The compute_grid_info() helper currently calls one of three helpers depending on the presence of tuning parameters in the model or recipe:

tune/R/grid_helpers.R

Lines 319 to 330 in f8d734a

	if (any_parameters_model) {
	if (any_parameters_preprocessor) {
	compute_grid_info_model_and_preprocessor(workflow, grid, parameters_model)
	} else {
	compute_grid_info_model(workflow, grid, parameters_model)
	}
	} else {
	if (any_parameters_preprocessor) {
	compute_grid_info_preprocessor(workflow, grid, parameters_model)
	} else {
	rlang::abort("Internal error: `workflow` should have some tunable parameters if `grid` is not `NULL`.")
	}

In implementing postprocessing, I'd like to refactor this to avoid inflating that number of helpers, but I want to make sure it's well-tested first before doing so!

[github-actions]

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