test_that("files datatype must be character", {
expect_equal(is.character(files), TRUE)
})
test_that("data1 datatype must be character", {
expect_equal(is.data.frame(data1), TRUE)
})
test_that("data1 datatype must be character", {
expect_equal(is.data.frame(data1), TRUE)
})
test_that("path datatype must be character", {
expect_equal(is.character(path), TRUE)
})
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