if (require("testthat") &&
require("insight") &&
require("pscl")) {
data("bioChemists")
m1 <- zeroinfl(art ~ fem + mar + kid5 + ment | kid5 + phd, data = bioChemists)
test_that("model_info", {
expect_true(model_info(m1)$is_poisson)
expect_true(model_info(m1)$is_zero_inflated)
})
test_that("find_predictors", {
expect_identical(
find_predictors(m1),
list(
conditional = c("fem", "mar", "kid5", "ment"),
zero_inflated = c("kid5", "phd")
)
)
expect_identical(
find_predictors(m1, flatten = TRUE),
c("fem", "mar", "kid5", "ment", "phd")
)
expect_null(find_predictors(m1, effects = "random"))
})
test_that("find_response", {
expect_identical(find_response(m1), "art")
})
test_that("link_inverse", {
expect_equal(link_inverse(m1)(.2), exp(.2), tolerance = 1e-5)
})
test_that("get_data", {
expect_equal(nrow(get_data(m1)), 915)
expect_equal(
colnames(get_data(m1)),
c("art", "fem", "mar", "kid5", "ment", "phd")
)
})
test_that("find_formula", {
expect_length(find_formula(m1), 2)
expect_equal(
find_formula(m1),
list(
conditional = as.formula("art ~ fem + mar + kid5 + ment"),
zero_inflated = as.formula("~kid5 + phd")
)
)
})
test_that("find_terms", {
expect_equal(
find_terms(m1),
list(
response = "art",
conditional = c("fem", "mar", "kid5", "ment"),
zero_inflated = c("kid5", "phd")
)
)
expect_equal(
find_terms(m1, flatten = TRUE),
c("art", "fem", "mar", "kid5", "ment", "phd")
)
})
test_that("n_obs", {
expect_equal(n_obs(m1), 915)
})
test_that("linkfun", {
expect_false(is.null(link_function(m1)))
})
test_that("find_parameters", {
expect_equal(
find_parameters(m1),
list(
conditional = c(
"count_(Intercept)",
"count_femWomen",
"count_marMarried",
"count_kid5",
"count_ment"
),
zero_inflated = c("zero_(Intercept)", "zero_kid5", "zero_phd")
)
)
expect_equal(nrow(get_parameters(m1)), 8)
expect_equal(nrow(get_parameters(m1, component = "zi")), 3)
expect_equal(
get_parameters(m1)$Parameter,
c(
"count_(Intercept)",
"count_femWomen",
"count_marMarried",
"count_kid5",
"count_ment",
"zero_(Intercept)",
"zero_kid5",
"zero_phd"
)
)
})
test_that("find_statistic", {
expect_identical(find_statistic(m1), "z-statistic")
})
test_that("get_statistic", {
expect_equal(
get_statistic(m1)$Statistic,
c(8.26297, -3.90986, 2.07134, -3.43156, 10.05389, -2.143, 0.21384, -1.84259),
tolerance = 1e-3
)
expect_equal(
get_statistic(m1)$Component,
c(
"conditional", "conditional", "conditional", "conditional",
"conditional", "zero_inflated", "zero_inflated", "zero_inflated"
),
tolerance = 1e-3
)
})
m2 <- zeroinfl(formula = art ~ . | 1, data = bioChemists, dist = "negbin")
.runThisTest <- Sys.getenv("RunAllinsightTests") == "yes"
if (.runThisTest || Sys.getenv("USER") == "travis") {
test_that("get_statistic", {
expect_equal(
get_statistic(m2)$Statistic,
c(1.84902, -2.97806, 1.83266, -3.32478, 0.42324, 8.38088, -0.14579),
tolerance = 1e-3
)
expect_equal(
get_statistic(m2)$Component,
c(
"conditional", "conditional", "conditional", "conditional",
"conditional", "conditional", "zero_inflated"
),
tolerance = 1e-3
)
})
}
}
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