if(require("suppdata") & require("testthat")){
    
    context("suppdata inputs")

    test_that("specifying multiple DOIs works", {
        skip_on_cran()
        expect_true(all(file.exists(suppdata(c("10.1101/016386", "10.1111/ele.12437"), si = 1))))
    })

    test_that("specifying multiple DOIs with vector of SIs works", {    
        skip_on_cran()
        expect_true(all(file.exists(suppdata(c("10.1101/016386", "10.1111/ele.12437"), si = c(1:2)))))
    })

    test_that("There is an error on non-existing DOI", {    
        skip_on_cran()
        expect_error(expect_warning(suppdata('nonsense', 1), "404"), "Cannot find publisher")
    })

    test_that("There is an error if SI vector is longer than DOI vector", {    
        skip_on_cran()
        expect_error(suppdata("10.6084/m9.figshare.979288", si = c(1,2,3)), "length")
    })

    test_that("There is an error if SI number is too large", {    
        skip_on_cran()
        expect_error(suppdata('10.6084/m9.figshare.979288', 20), "greater than number of detected SIs")
    })

    test_that("There are errors for non-existing SIs", {    
        skip_on_cran()
        expect_error(suppdata("10.7717/peerj.3006", si = 99))
        expect_error(suppdata("10.7717/peerj.3006", si = "si_1"))
        expect_error(suppdata("10.5194/bg-15-3625-2018", si = 1), "No supplement found")
    })

    test_that("There is an error for non-existing publishers", {    
        skip_on_cran()
        expect_warning(expect_error(suppdata("10.5194/bg-15-3625-xxxx", si = 1), "Cannot find publisher"), "404")
    })

    test_that("There is an error for boolean SI info", {    
        skip_on_cran()
        expect_error(suppdata("10.6084/m9.figshare.979288", FALSE), "'si' must be numeric or character")
        expect_error(suppdata:::.suppdata.figshare("10.6084/m9.figshare.979288", FALSE), "FigShare download requires numeric SI info")
    })

    test_that("There is an error on empty DOI vector", {    
        skip_on_cran()
        expect_error(suppdata(as.character(c()), "1"), "'x' must contain some data")
    })

    test_that("There is an error if target dir does not exist", {
        skip_on_cran()
        expect_error(suppdata("10.1371/journal.pone.0127900", 1, dir = "/wrong.path"), "must exist")
    })

    test_that("file name can be set", {    
        skip_on_cran()
        filename <- "myfile.R"
        saved_file <- suppdata("10.6084/m9.figshare.979288", 1, save.name = filename)
        expect_true(file.exists(saved_file))
        expect_equal(basename(saved_file), filename)
    })

    test_that("output dir can be set", {    
        skip_on_cran()
        testdir <- file.path(tempdir(), "testdir")
        dir.create(testdir)
        saved_file <- suppdata("10.6084/m9.figshare.979288", 1, dir = testdir)
        expect_true(file.exists(file.path(testdir, "10.6084_m9.figshare.979288_1")))
        unlink(testdir)
    })

    test_that("no console output by default", {    
        skip_on_cran()
        expect_equal(capture_output(suppdata(x = "10.1371/journal.pone.0126524", si = 1)), "")
    })

    test_that("no console output if deactivated", {    
        skip_on_cran()
        expect_equal(capture_output(suppdata(x = "10.1371/journal.pone.0126524", si = 1, list = FALSE)), "")
    })

    test_that("zipfile contents can be listed on the console", {    
        skip_on_cran()
        expect_output(suppdata(x = "10.1371/journal.pone.0126524", si = "pone.0126524.s002.jpg", list = TRUE, from="epmc"), "Files in ZIP")
    })

    test_that("zipfile contents are listed on the console even if file is missing", {    
        skip_on_cran()
        expect_error(expect_output(suppdata(x = "10.1371/journal.pone.0126524", si = "not_there", from="epmc", list = TRUE), "Files in ZIP"))
    })

}