context("coalesce")
test_that("coalesce", {
expect_identical(coalesce(NULL), NULL)
expect_identical(coalesce(1, NULL), 1)
expect_identical(coalesce(NULL, 1), 1)
f = function(a, b, c) coalesce(a,b,c)
expect_identical(f(b = NULL, c = 1), 1)
})
test_that("coalesce works with functions", {
ff = function(x) 123
expect_identical(coalesce(NULL, ff), ff)
# FIXME: this is a problem in R / missing. see issue 48
#expect_identical(coalesce(NULL, min), min)
})
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