Unit test.
Project: http://git-wip-us.apache.org/repos/asf/commons-rng/repo Commit: http://git-wip-us.apache.org/repos/asf/commons-rng/commit/144f88b5 Tree: http://git-wip-us.apache.org/repos/asf/commons-rng/tree/144f88b5 Diff: http://git-wip-us.apache.org/repos/asf/commons-rng/diff/144f88b5 Branch: refs/heads/master Commit: 144f88b5f35ec333d329f7a827c297b72bf9a8c1 Parents: 00c1dee Author: Gilles <er...@apache.org> Authored: Mon Nov 21 14:46:50 2016 +0100 Committer: Gilles <er...@apache.org> Committed: Mon Nov 21 14:46:50 2016 +0100 ---------------------------------------------------------------------- .../rng/sampling/PermutationSamplerTest.java | 21 ++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/commons-rng/blob/144f88b5/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/PermutationSamplerTest.java ---------------------------------------------------------------------- diff --git a/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/PermutationSamplerTest.java b/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/PermutationSamplerTest.java index bd32c05..c91218d 100644 --- a/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/PermutationSamplerTest.java +++ b/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/PermutationSamplerTest.java @@ -39,7 +39,24 @@ public class PermutationSamplerTest { private final ChiSquareTest chiSquareTest = new ChiSquareTest(); @Test - public void testSample() { + public void testSampleTrivial() { + final int n = 6; + final int k = 3; + final PermutationSampler sampler = new PermutationSampler(RandomSource.create(RandomSource.KISS), + 6, 3); + final int[] random = sampler.sample(); + SAMPLE: for (int s : random) { + for (int i = 0; i < n; i++) { + if (i == s) { + continue SAMPLE; + } + } + Assert.fail("number " + s + " not in array"); + } + } + + @Test + public void testSampleChiSquareTest() { final int[][] p = { { 0, 1, 2 }, { 0, 2, 1 }, { 1, 0, 2 }, { 1, 2, 0 }, { 2, 0, 1 }, { 2, 1, 0 } }; @@ -55,7 +72,7 @@ public class PermutationSamplerTest { observed[findPerm(p, sampler.sample())]++; } - // Pass if we cannot reject null hypothesis that distributions are the same + // Pass if we cannot reject null hypothesis that distributions are the same. Assert.assertFalse(chiSquareTest.chiSquareTest(expected, observed, 0.001)); }
