tests/testthat/test_gr.r

In theislab/destiny: Creates diffusion maps

context('gene relevance')

smps <- 120L
part <- 1 / 4
test_data <- local({
	d <- data.frame(
	  A = c(seq(1,  0, length = smps * part), rep(0, smps * 3 * part)),
		B = c(seq(0,  1, length = smps * 2 * part), rep(1, smps * 2 * part)),
		C = c(rep(0, smps * part), seq(0,  1, length = smps * 2 * part), rep(0, smps * part)),
		D = c(rep(0, smps * part), seq(0, .5, length = smps * part), rep(0, smps * part), seq(.5, 1, length = smps * part)), #: + rnorm(smps, 0, .05)
		stringsAsFactors = FALSE
	)
	d$Cell <- seq_len(nrow(d))
	d$Type <- as.integer(ceiling(d$Cell / (smps / 4)))
	d
})

test_that('Gene Relevance returns the right genes', {
	set.seed(0)
	dm <- DiffusionMap(test_data, distance = 'rankcor')
	gr <- gene_relevance(dm,  smooth = FALSE)
	gr_plot <- plot_gene_relevance(gr, iter_smooth = 0, n_top = 1)
	skip('Not yet stable')
	expect_identical(gr_plot$ids[1:2], c('D', 'C'))
})