rxTest({
  ode.1c <- rxode2({
    V <- 20
    Cl <- 1
    fc <- 1
    C2 <- center / V
    d / dt(center) ~ -Cl * C2
    f(center) <- fc
  })

  dur <- 0.5
  ii <- 2
  m <- "liblsoda"
  d <- 3

  for (m in c("liblsoda", "lsoda", "dop853")) {
    test_that(sprintf("missing evid tests for %s", m), {
      for (dur in c(0.5, 1)) {
        for (ii in seq(2, 24, by = 2)) {
          et <- et() %>%
            et(amt = d, rate = d / dur) %>%
            et(time = ii, amt = d, ii = ii, addl = floor(24 / ii), rate = d / dur) %>%
            et(c(dur, seq(0, 24, length.out = 200)))

          x2 <- solve(ode.1c, et, method = m, maxsteps = 10000)

          et <- data.frame(et)
          et <- et[, names(et) != "evid"]

          expect_warning(x3 <- solve(ode.1c, et, method = m, maxsteps = 10000), NA)

          expect_equal(data.frame(x2), data.frame(x3))

          et2 <- et(et)

          expect_equal(data.frame(et), data.frame(et2)[, c("time", "amt", "rate", "ii", "addl")])


          d <- 3
          et <- et() %>%
            et(amt = d, dur = dur) %>%
            et(time = ii, amt = d, ii = ii, addl = floor(24 / ii), dur = dur) %>%
            et(c(dur, seq(0, 24, length.out = 200)))

          x2 <- solve(ode.1c, et, method = m, maxsteps = 10000)

          et <- data.frame(et)
          et <- et[, names(et) != "evid"]

          expect_warning(x3 <- solve(ode.1c, et, method = m, maxsteps = 10000), NA)

          expect_equal(data.frame(x2), data.frame(x3))

          et <- et() %>%
            et(amt = d, ii = ii, ss = 1, dur = dur) %>%
            et(c(dur, seq(0, 24, length.out = 200)))

          x2 <- solve(ode.1c, et, method = m, maxsteps = 10000)

          et <- data.frame(et)
          et <- et[, names(et) != "evid"]

          expect_warning(x3 <- solve(ode.1c, et, method = m, maxsteps = 10000), NA)

          expect_equal(data.frame(x2), data.frame(x3))
        }
      }
    })
  }
})