tests/testthat/test-file-manip.R

In mapscanner: Print Maps, Draw on Them, Scan Them Back in

context ("file manipulation")

skip_on_cran ()

test_that ("file manipulation", {
    f_orig <- system.file ("extdata", "omaha.png",
        package = "mapscanner"
    )
    f_modified <- system.file ("extdata", "omaha-polygons.png",
        package = "mapscanner"
    )

    requireNamespace ("mmand")
    f1 <- list.files (tempdir ())
    png (file.path (tempdir (), "junk.png"))
    expect_silent (ms_rotate_map (f_orig, f_modified))
    graphics.off ()
    f2 <- list.files (tempdir ())
    f2 <- f2 [!f2 %in% f1]
    expect_true ("junk.png" %in% f2)
    expect_true ("test.png" %in% f2) # default name of rotated image
})