Nothing
context("test-dina-model")
test_that("Verify Bad Input detected", {
expect_error(dina(1:5, sim_q_matrix(10, 3)), info = "Detected Bad Item Data Matrix")
expect_error(dina(sim_q_matrix(10, 3), 1:5), info = "Detected Bad Q Matrix")
})
test_that("Verify Model Reproducibility", {
# Setup Parameters
N = 15 # Number of Examinees / Subjects
J = 10 # Number of Items
K = 2 # Number of Skills / Attributes
# Assign slipping and guessing values for each item
ss = gs = rep(.2, J)
# Simulate identifiable Q matrix
Q = sim_q_matrix(J, K)
# Simulate subject attributes
subject_alphas = sim_subject_attributes(N, K)
# Item data
items_dina = sim_dina_items(subject_alphas, Q, ss, gs)
## Estimate two models ----
# Set a seed for reproducibility
set.seed(192)
model1 = dina(items_dina, Q, chain_length = 100)
# Set the same seed
set.seed(192)
model2 = dina(items_dina, Q, chain_length = 100)
expect_equal(model1, model2,
info = "Models are reproducible under same seed.")
})
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