tests/testthat/test_visualization.R

In Seurat: Tools for Single Cell Genomics

# Tests for functions in visualization.R

set.seed(42)

# Tests for visualization utilities
# ------------------------------------------------------------------------------
pbmc_small[["tsne_new"]] <- CollapseEmbeddingOutliers(pbmc_small,
     reduction = "tsne", reduction.key = 'tsne_', outlier.sd = 0.5)

test_that("CollapseEmbeddingOutliers works", {
  expect_equal(Embeddings(pbmc_small[["tsne_new"]])[1, 1], -12.59713, tolerance = 1e-6)
  expect_equal(colSums(x = Embeddings(object = pbmc_small[["tsne_new"]])), c(-219.9218, 182.9215), check.attributes = FALSE, tolerance = 1e-5)
})


test_that("DiscretePalette works", {
  isColors <- function(x) {
    all(grepl("#[0-9A-Fa-f]{6}", x))
  }
  expect_true(isColors(DiscretePalette(26)))
  expect_true(isColors(DiscretePalette(32)))
  expect_true(isColors(DiscretePalette(36)))
  expect_warning(DiscretePalette(50), "Not enough colours")
})