AMR/tests/testthat/test-g.test.R

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context("g.test.R")
test_that("G-test works", {
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# GOODNESS-OF-FIT
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# example 1: clearfield rice vs. red rice
x <- c(772, 1611, 737)
x.expected <- vector2ratio(x, ratio = "1:2:1")
expect_equal(g.test(x, x.expected),
expected = 0.12574,
tolerance = 0.00001)
# example 2: red crossbills
x <- c(1752, 1895)
x.expected <- vector2ratio(x, ratio = c(1, 1))
expect_equal(g.test(x, x.expected),
expected = 0.01787343,
tolerance = 0.00000001)
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# INDEPENDENCE
# this should always yield a p value of around 0
x <- matrix(data = round(runif(4) * 100000, 0),
ncol = 2,
byrow = TRUE)
expect_lt(g.test(x),
0.0001)
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})