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[morpheus.git] / pkg / tests / testthat / test-hungarianAlgorithm.R
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1test_that("HungarianAlgorithm provides the correct answer on various inputs",
2{
3 for (n in c(2,3,10,50))
4 {
5 for (repetition in 1:3)
6 {
7 # Generate a random vector, and permute it:
8 # we expect the algorithm to retrieve the permutation
9 v <- runif(n, min=-1, max=1)
10 permutation <- sample(1:n)
11 v_p <- v[permutation]
12
13 # v is reference, v_p is v after permutation
14 # distances[i,j] = distance between i-th component of v
15 # and j-th component of v_p
16 # "in rows : reference; in columns: after permutation"
17 # "permutation" contains order on v to match v_p as closely as possible
18 distances <- sapply(v_p, function(elt) ( abs(elt - v) ) )
19 assignment <- .hungarianAlgorithm(distances)
20 expect_equal(assignment, permutation)
21 }
22 }
23})