context("combinatorial bijections")
test_that("zeros are handled properly", {
expect_equal(index_subset(0), c(2, 1, 0))
expect_equal(subset_index(c(2, 1, 0)), 0)
expect_equal(subset_partition(c(2, 1, 0)), c(0, 0, 0))
expect_equal(partition_subset(c(0, 0, 0)), c(2, 1, 0))
})
test_that("nonsense inputs generate errors", {
expect_error(index_subset(-1))
expect_error(subset_index(c(1, 1, 0)))
expect_error(subset_index(c(1, 0, -1)))
expect_error(subset_partition(c(3, 3, 1)))
expect_error(subset_partition(c(1, 0, -1)))
expect_error(partition_subset(c(1, 2, 1)))
expect_error(partition_subset(c(0, 0, -1)))
})
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