Nothing
#testthat for tetrachoric
#Alsto tests that comorbidity and phi work
#data from Kirk, 1973
Q1 = .5
Q2 = .5
t0 <- comorbidity(.5,.2275,.11375) # 0
t4 = comorbidity(.5,.5,.3154950) # .4
t5= comorbidity(.5,.5,.3333333) # .5
t8 <- comorbidity(.5,.5,.39758450) #.8
test_that("tetrachoric matchs Kirk",
expect_equivalent(t0$tetra$rho,0))
test_that("tetrachoric matchs Kirk",
expect_equivalent(t4$tetra$rho,.4,tolerance=10^-4))
test_that("tetrachoric matchs Kirk",
expect_equivalent(t5$tetra$rho,.5,tolerance=10^-5))
test_that("tetrachoric matchs Kirk",
expect_equivalent(t8$tetra$rho,.8,tolerance=10^-5))
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