```
context("state update")
## With no births and deaths, and a single patch
## and with a fixed seed, check that the numbers work out.
test_that("update state with no births and deaths and one patch", {
state_in <- state(
s_patches = 1000,
e_patches = 0,
i_patches = 10,
r_patches = 0,
birth_rates = 0,
death_rates = 0,
transmission_rates = 0.2,
infection_rates = 0.1,
recovery_rates = 0.1,
movement_rate = matrix(1, nrow = 1, ncol = 1)
)
set.seed(42)
state_out <- update_state(state_in, 1)
patch <- state_out[["patches"]][[1]]
expect_equal(patch$susceptible, 996)
expect_equal(patch$exposed, 4)
expect_equal(patch$infected, 8)
expect_equal(patch$recovered, 2)
})
test_that("update state with no births and deaths and 2 patches", {
state_in <- state(
s_patches = c(1000, 1000),
e_patches = c(0, 0),
i_patches = c(10, 10),
r_patches = c(0, 0),
birth_rates = c(0, 0),
death_rates = c(0, 0),
transmission_rates = c(0.2, 0.2),
infection_rates = c(0.1, 0.1),
recovery_rates = c(0.1, 0.1),
movement_rate = matrix(
c(1.61, 0.22, 0.36, 1.2), nrow = 2, ncol = 2, byrow = TRUE
)
)
set.seed(42)
state_out <- update_state(state_in, 1)
patch1 <- state_out[["patches"]][[1]]
expect_equal(patch1$susceptible, 1124)
expect_equal(patch1$exposed, 2)
expect_equal(patch1$infected, 7)
expect_equal(patch1$recovered, 1)
patch2 <- state_out[["patches"]][[2]]
expect_equal(patch2$susceptible, 872)
expect_equal(patch2$exposed, 2)
expect_equal(patch2$infected, 10)
expect_equal(patch2$recovered, 2)
})
```

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