Make error and warning assertions in test suite more specific

[dylanhmorris]

Lines like these need to check that the expected error is being raised, not just any error

ww-inference-model/tests/testthat/test_get_stan_data.R

Lines 509 to 526 in 0360365

	expect_error(get_stan_data(
	input_count_data,
	input_ww_data,
	date_time_spine,
	lab_site_site_spine,
	site_subpop_spine,
	lab_site_subpop_spine,
	last_count_data_date,
	first_count_data_date,
	forecast_date,
	forecast_horizon,
	calibration_time,
	generation_interval,
	inf_to_count_delay,
	infection_feedback_pmf = c(0.5, 0.4, 0.2),
	params,
	include_ww
	))