don't rely on randomness in CRAN builder

Author: thomasp85

tests/testthat/test-random-walk.R

@@ -14,8 +14,8 @@ test_that("random_walk_rank returns correct data", {
   expect_type(node_walk, 'list')
   expect_type(edge_walk, 'list')
   expect_equal(node_walk[[5]], c(1, 12))
-  expect_equal(edge_walk[[36]], 1:4)
-  expect_equal(edge_walk[[36]], 1:4)
   expect_equal(node_walk[[2]], integer())
   expect_equal(edge_walk[[1]], integer())
+  skip_on_cran()
+  expect_equal(edge_walk[[36]], 1:4)
 })