Check file system access rights
checkAccess(x, access = "")check_access(x, access = "")
assertAccess(x, access = "", .var.name = vname(x), add = NULL)
assert_access(x, access = "", .var.name = vname(x), add = NULL)
testAccess(x, access = "")
test_access(x, access = "")
expect_access(x, access = "", info = NULL, label = vname(x))
Depending on the function prefix: If the check is successful, the functions
assertAccess
/assert_access
return
x
invisibly, whereas
checkAccess
/check_access
and
testAccess
/test_access
return
TRUE
.
If the check is not successful,
assertAccess
/assert_access
throws an error message,
testAccess
/test_access
returns FALSE
,
and checkAccess
/check_access
return a string with the error message.
The function expect_access
always returns an
[any]
Object to check.
[character(1)
]
Single string containing possible characters ‘r’, ‘w’ and ‘x’ to
force a check for read, write or execute access rights, respectively.
Write and executable rights are not checked on Windows.
[character(1)
]
Name of the checked object to print in assertions. Defaults to
the heuristic implemented in vname
.
[AssertCollection
]
Collection to store assertion messages. See AssertCollection
.
[character(1)
]
Extra information to be included in the message for the testthat reporter.
See expect_that
.
[character(1)
]
Name of the checked object to print in messages. Defaults to
the heuristic implemented in vname
.
Other filesystem:
checkDirectoryExists()
,
checkFileExists()
,
checkPathForOutput()
# Is R's home directory readable?
testAccess(R.home(), "r")
# Is R's home directory writeable?
testAccess(R.home(), "w")
Run the code above in your browser using DataLab