View source: R/checkFileExists.R
checkFileExists | R Documentation |
Check existence and access rights of files
checkFileExists(x, access = "", extension = NULL)
check_file_exists(x, access = "", extension = NULL)
assertFileExists(
x,
access = "",
extension = NULL,
.var.name = vname(x),
add = NULL
)
assert_file_exists(
x,
access = "",
extension = NULL,
.var.name = vname(x),
add = NULL
)
testFileExists(x, access = "", extension = NULL)
test_file_exists(x, access = "", extension = NULL)
expect_file_exists(
x,
access = "",
extension = NULL,
info = NULL,
label = vname(x)
)
checkFile(x, access = "", extension = NULL)
assertFile(x, access = "", extension = NULL, .var.name = vname(x), add = NULL)
assert_file(x, access = "", extension = NULL, .var.name = vname(x), add = NULL)
testFile(x, access = "", extension = NULL)
expect_file(x, access = "", extension = NULL, info = NULL, label = vname(x))
x |
[any] |
access |
[ |
extension |
[ |
.var.name |
[ |
add |
[ |
info |
[ |
label |
[ |
Depending on the function prefix:
If the check is successful, the functions
assertFileExists
/assert_file_exists
return
x
invisibly, whereas
checkFileExists
/check_file_exists
and
testFileExists
/test_file_exists
return
TRUE
.
If the check is not successful,
assertFileExists
/assert_file_exists
throws an error message,
testFileExists
/test_file_exists
returns FALSE
,
and checkFileExists
/check_file_exists
return a string with the error message.
The function expect_file_exists
always returns an
expectation
.
The functions without the suffix “exists” are deprecated and will be removed
from the package in a future version due to name clashes.
test_file
has been unexported already.
Other filesystem:
checkAccess()
,
checkDirectoryExists()
,
checkPathForOutput()
# Check if R's COPYING file is readable
testFileExists(file.path(R.home(), "COPYING"), access = "r")
# Check if R's COPYING file is readable and writable
testFileExists(file.path(R.home(), "COPYING"), access = "rw")
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