test_that("rma helpers work", {

  skip_if_not_installed("metafor")

  library(dplyr)
  library(DeclareDesign)
  library(metafor)

  set.seed(42)

  mu <- 0.2 # true PATE
  tau <- 0.0 # true SD of site-level ATEs

  design <-
    declare_model(
      N = 200,
      site = 1:N,
      std.error = pmax(0.1, abs(rnorm(N, mean = 0.8, sd = 0.5))),
      theta = rnorm(N, mean = mu, sd = tau), # when tau = 0, theta = mu
      estimate = rnorm(N, mean = theta, sd = std.error)
    ) +
    declare_inquiry(mu = mu, tau_sq = tau^2) +
    declare_estimator(
      yi = estimate, sei = std.error, method = "REML",
      .method = rma_helper, .summary = rma_mu_tau,
      term = c("mu", "tau_sq"), inquiry = c("mu", "tau_sq"),
      label = "random-effects") +
    declare_estimator(
      yi = estimate, sei = std.error, method = "FE",
      .method = rma_helper, .summary = rma_mu_tau,
      term = c("mu", "tau_sq"), inquiry = c("mu", "tau_sq"),
      label = "fixed-effects")

  declaration_19.3 <- redesign(design, tau = c(0, 1))

  expect_error(simulate_design(declaration_19.3, sims = 1), NA)

})