Nothing
test_that("plot 4d Venn", {
genes <- paste("gene",1:1000,sep="")
set.seed(20210408)
x <- list(A=sample(genes,300),B=sample(genes,525),C=sample(genes,440),D=sample(genes,350))
p <- ggVennDiagram(x)
expect_is(p, "ggplot")
})
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