skip_if_not_installed("ivreg")
data("CigaretteDemand", package = "ivreg")
m1 <- ivreg::ivreg(log(packs) ~ log(rprice) + log(rincome) | salestax + log(rincome),
data = CigaretteDemand
)
test_that("model_info", {
expect_true(model_info(m1)$is_linear)
})
test_that("find_predictors", {
expect_identical(
find_predictors(m1),
list(
conditional = c("rprice", "rincome"),
instruments = c("salestax", "rincome")
)
)
expect_identical(
find_predictors(m1, flatten = TRUE),
c("rprice", "rincome", "salestax")
)
expect_null(find_predictors(m1, effects = "random"))
})
test_that("find_random", {
expect_null(find_random(m1))
})
test_that("get_random", {
expect_warning(get_random(m1))
})
test_that("find_response", {
expect_identical(find_response(m1), "packs")
})
test_that("get_response", {
expect_equal(get_response(m1), CigaretteDemand$packs)
})
test_that("get_predictors", {
expect_equal(
colnames(get_predictors(m1)),
c("rprice", "rincome", "salestax")
)
})
test_that("link_inverse", {
expect_equal(link_inverse(m1)(0.2), 0.2, tolerance = 1e-5)
})
test_that("get_data", {
expect_equal(nrow(get_data(m1)), 48)
expect_equal(
colnames(get_data(m1)),
c("packs", "rprice", "rincome", "salestax")
)
})
test_that("find_formula", {
expect_length(find_formula(m1), 2)
expect_equal(
find_formula(m1),
list(
conditional = as.formula("log(packs) ~ log(rprice) + log(rincome)"),
instruments = as.formula("~salestax + log(rincome)")
),
ignore_attr = TRUE
)
})
test_that("find_variables", {
expect_equal(
find_variables(m1),
list(
response = "packs",
conditional = c("rprice", "rincome"),
instruments = c("salestax", "rincome")
)
)
expect_equal(
find_variables(m1, flatten = TRUE),
c("packs", "rprice", "rincome", "salestax")
)
})
test_that("n_obs", {
expect_equal(n_obs(m1), 48)
})
test_that("linkfun", {
expect_false(is.null(link_function(m1)))
})
test_that("find_parameters", {
expect_equal(
find_parameters(m1),
list(
conditional = c("(Intercept)", "log(rprice)", "log(rincome)")
)
)
expect_equal(nrow(get_parameters(m1)), 3)
expect_equal(
get_parameters(m1)$Parameter,
c("(Intercept)", "log(rprice)", "log(rincome)")
)
})
test_that("is_multivariate", {
expect_false(is_multivariate(m1))
})
test_that("find_terms", {
expect_equal(
find_terms(m1),
list(
response = "log(packs)",
conditional = c("log(rprice)", "log(rincome)"),
instruments = c("salestax", "log(rincome)")
)
)
expect_equal(nrow(get_parameters(m1)), 3)
expect_equal(
get_parameters(m1)$Parameter,
c("(Intercept)", "log(rprice)", "log(rincome)")
)
})
test_that("find_statistic", {
expect_identical(find_statistic(m1), "t-statistic")
})
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