Nothing
require(testthat)
require(Cardinal)
context("XDataFrame class")
test_that("XDataFrame basics", {
expect_true(validObject(new("XDataFrame")))
xdf <- XDataFrame(x=1:10, y=11:20)
xdf$z <- 21:30
expect_true(validObject(xdf))
xdf$z <- NULL
expect_true(validObject(xdf))
})
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