## load_all(".")
#  load_all("voi")

pi1 <- "p_side_effects_t1"
pi2 <- "p_side_effects_t2"

test_that("single-parameter variance-based EVPPI",{
    evppivar(chemo_nb[,1], chemo_pars, pars=pi1)
    expect_equal(evppivar(chemo_nb[,1], chemo_pars[,"p_side_effects_t1"])$evppi,
                 evppivar(chemo_nb[,1], chemo_pars, pars=pi1)$evppi)
})

test_that("single-parameter variance-based EVPPI, alternative GAM basis",{
    expect_error({
    evppivar(chemo_nb[,1], chemo_pars, pars=pi1, gam_formula="s(p_side_effects_t1, bs='tp')")
    pi1 <- chemo_pars[,pi1]
    evppivar(chemo_nb[,1], pi1, gam_formula="s(pi1, bs='tp')")
    }, NA)
})

test_that("Variance-based EVPPI: list of parameters",{
    e1 <- evppivar(chemo_nb[,1], chemo_pars, pars=pi1)
    e3 <- evppivar(chemo_nb[,1], chemo_pars, pars=list(pi1,pi2))
    expect_equal(e1$evppi, e3$evppi[e3$pars==pi1])
})