test_that("ztppp agrees with ppp_sequential for high intensities", {
  # High intensity, there are practically no zero event trajectories
  r_ppp_t <- unlist(lapply(integer(10000), function(x) ppp_sequential(range_t = c(1, 3), rate = 10, atmost1 = TRUE)))
  r_ztppp <- unlist(lapply(integer(10000), function(x) ztppp(range_t = c(1, 3), rate = 10, atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ppp_t, ppp2 = r_ztppp, threshold = 0.1, showQQ = TRUE)
})

test_that("ztppp agrees with ppp_sequential for low intensities", {
  # Low intensity, there are many zero event trajectories -- condition on having >=1 event
  r_ppp_t_low <- unlist(lapply(integer(10000), function(x) ppp_sequential(range_t = c(1, 3), rate = 0.1, atmost1 = TRUE)))
  r_ztppp_low <- unlist(lapply(integer(length(r_ppp_t_low)), function(x) ztppp(range_t = c(1, 3), rate = 0.1, atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ppp_t_low, ppp2 = r_ztppp_low, threshold = 0.1, showQQ = TRUE)
})

test_that("ztNHPPP methods agree on the first time to event with constant rate", {
  l <- function(t) rep(2, length(t))
  L <- function(t) 2 * t
  Li <- function(z) z / 2

  r_ztppp <- unlist(lapply(integer(10000), function(x) ztppp(range_t = c(1, 13), rate = 2, atmost1 = TRUE)))
  r_ztnhppp_ci <- unlist(lapply(integer(10000), function(x) ztdraw_cumulative_intensity(Lambda = L, Lambda_inv = Li, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_ci, ppp2 = r_ztppp, threshold = 0.1, showQQ = TRUE)

  r_ztnhppp_intens_linear <- unlist(lapply(integer(10000), function(x) ztdraw_sc_linear(alpha = 2, beta = 0, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_linear, ppp2 = r_ztppp, threshold = 0.1, showQQ = TRUE)

  r_ztnhppp_intens_exp <- unlist(lapply(integer(10000), function(x) ztdraw_sc_loglinear(alpha = log(2), beta = 0, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_exp, ppp2 = r_ztppp, threshold = 0.1, showQQ = TRUE)

  r_ztnhppp_intens <- unlist(lapply(integer(10000), function(x) ztdraw_intensity(lambda = l, lambda_maj = 2.1, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens, ppp2 = r_ztppp, threshold = 0.1, showQQ = TRUE)

  r_ztnhppp_intens_piecewise <- unlist(lapply(integer(10000), function(x) ztdraw_intensity_step(lambda = l, lambda_maj_vector = l(2:13), times_vector = c(1:13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens, ppp2 = r_ztppp, threshold = 0.1, showQQ = TRUE)
})

test_that("ztNHPPP linear intensity agrees with general methods", {
  l <- function(t, alpha = 1, beta = 2) alpha + beta * t
  L <- function(t, alpha = 1, beta = 2, t0 = 1) Lambda_linear_form(t, alpha = alpha, beta = beta, t0 = t0)
  Li <- function(z, alpha = 1, beta = 2, t0 = 1) Lambda_inv_linear_form(z, alpha = alpha, beta = beta, t0 = t0)

  r_ztnhppp_intens_linear <- unlist(lapply(integer(10000), function(x) ztdraw_sc_linear(alpha = 1, beta = 2, range_t = c(1, 13), atmost1 = TRUE)))
  r_ztnhppp_ci <- unlist(lapply(integer(10000), function(x) ztdraw_cumulative_intensity(Lambda = L, Lambda_inv = Li, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_linear, ppp2 = r_ztnhppp_ci, threshold = 0.1, showQQ = TRUE)

  r_ztnhppp_intens <- unlist(lapply(integer(10000), function(x) ztdraw_intensity(lambda = l, lambda_maj = l(13), range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_linear, ppp2 = r_ztnhppp_intens, threshold = 0.1, showQQ = TRUE)
})


test_that("ztNHPPP linear intensity agrees with linear intensity for high rates", {
  r_ztnhppp_intens_linear <- unlist(lapply(integer(10000), function(x) ztdraw_sc_linear(alpha = 1, beta = 2, range_t = c(1, 13), atmost1 = TRUE)))
  r_nhppp_intens_linear <- unlist(lapply(integer(10000), function(x) draw_sc_linear(alpha = 1, beta = 2, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_linear, ppp2 = r_nhppp_intens_linear, threshold = 0.1, showQQ = TRUE)
})

test_that("ztNHPPP linear intensity agrees with linear intensity for low rates", {
  r_nhppp_intens_linear <- unlist(lapply(integer(10000), function(x) draw_sc_linear(alpha = 1, beta = 2, range_t = c(1, 1.1), atmost1 = TRUE)))
  r_ztnhppp_intens_linear <- unlist(lapply(integer(length(r_nhppp_intens_linear)), function(x) ztdraw_sc_linear(alpha = 1, beta = 2, range_t = c(1, 1.1), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_linear, ppp2 = r_nhppp_intens_linear, threshold = 0.15, showQQ = TRUE)
})


test_that("ztNHPPP exponential agrees with general methods", {
  l <- function(t, alpha = .1, beta = .02) exp(alpha + beta * t)
  L <- function(t, alpha = .1, beta = .02, t0 = 1) Lambda_exp_form(t, alpha = alpha, beta = beta, t0 = t0)
  Li <- function(z, alpha = .1, beta = .02, t0 = 1) Lambda_inv_exp_form(z, alpha = alpha, beta = beta, t0 = t0)

  r_ztnhppp_intens_exp <- unlist(lapply(integer(10000), function(x) ztdraw_sc_loglinear(alpha = .1, beta = .02, range_t = c(1, 13), atmost1 = TRUE)))
  r_ztnhppp_ci <- unlist(lapply(integer(10000), function(x) ztdraw_cumulative_intensity(Lambda = L, Lambda_inv = Li, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_exp, ppp2 = r_ztnhppp_ci, threshold = 0.1, showQQ = TRUE)

  r_ztnhppp_intens <- unlist(lapply(integer(10000), function(x) ztdraw_intensity(lambda = l, lambda_maj = l(13), range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_ztnhppp_intens_exp, ppp2 = r_ztnhppp_intens, threshold = 0.1, showQQ = TRUE)
})


test_that("ztNHPPP exponential agrees with NHPPP exponential for high rates", {
  r_nhppp_intens_exp <- unlist(lapply(integer(10000), function(x) draw_sc_loglinear(alpha = .1, beta = .02, range_t = c(1, 13), atmost1 = TRUE)))
  r_ztnhppp_intens_exp <- unlist(lapply(integer(10000), function(x) ztdraw_sc_loglinear(alpha = .1, beta = .02, range_t = c(1, 13), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_nhppp_intens_exp, ppp2 = r_ztnhppp_intens_exp, threshold = 0.1, showQQ = TRUE)
})


test_that("ztNHPPP exponential agrees with NHPPP exponential for low rates", {
  r_nhppp_intens_exp <- unlist(lapply(integer(10000), function(x) draw_sc_loglinear(alpha = .1, beta = .02, range_t = c(1, 1.1), atmost1 = TRUE)))
  r_ztnhppp_intens_exp <- unlist(lapply(integer(length(r_nhppp_intens_exp)), function(x) ztdraw_sc_loglinear(alpha = .1, beta = .02, range_t = c(1, 1.1), atmost1 = TRUE)))
  compare_ppp_vectors(ppp1 = r_nhppp_intens_exp, ppp2 = r_ztnhppp_intens_exp, threshold = 0.1, showQQ = TRUE)
})