assertions-file: Useful test related to files

In assertthat: Easy Pre and Post Assertions

Description

Useful test related to files

Usage

is.dir(path)

is.writeable(path)

is.readable(path)

has_extension(path, ext)

Arguments

path	a file path to examine
ext	extension to test for (has_extension only)

Examples

see_if(is.dir(1))

tmp <- tempfile()
see_if(file.exists(tmp))
see_if(is.dir(tmp))

writeLines("x", tmp)
see_if(file.exists(tmp))
see_if(is.dir(tmp))
see_if(is.writeable(tmp))
see_if(is.readable(tmp))
unlink(tmp)

see_if(is.readable(tmp))

Example output

[1] FALSE
attr(,"msg")
[1] "path is not a string (a length one character vector)."
[1] FALSE
attr(,"msg")
[1] "Path '/work/tmp/tmp/Rtmpxd6Iaa/file62264968ac89' does not exist"
[1] FALSE
attr(,"msg")
[1] "Path '/work/tmp/tmp/Rtmpxd6Iaa/file62264968ac89' does not exist"
[1] TRUE
[1] FALSE
attr(,"msg")
[1] "Path '/work/tmp/tmp/Rtmpxd6Iaa/file62264968ac89' is not a directory"
[1] TRUE
[1] TRUE
[1] FALSE
attr(,"msg")
[1] "Path '/work/tmp/tmp/Rtmpxd6Iaa/file62264968ac89' does not exist"

assertthat documentation built on May 1, 2019, 10:25 p.m.