Check if an argument is an environment

Check if an argument is an environment

checkEnvironment(x, contains = character(0L), null.ok = FALSE)

check_environment(x, contains = character(0L), null.ok = FALSE)

assertEnvironment(
  x,
  contains = character(0L),
  null.ok = FALSE,
  .var.name = vname(x),
  add = NULL
)

assert_environment(
  x,
  contains = character(0L),
  null.ok = FALSE,
  .var.name = vname(x),
  add = NULL
)

testEnvironment(x, contains = character(0L), null.ok = FALSE)

test_environment(x, contains = character(0L), null.ok = FALSE)

expect_environment(
  x,
  contains = character(0L),
  null.ok = FALSE,
  info = NULL,
  label = vname(x)
)

Arguments

x

[any]
Object to check.

contains

[character]
Vector of object names expected in the environment. Defaults to character(0).

null.ok

[logical(1)]
If set to TRUE, x may also be NULL. In this case only a type check of x is performed, all additional checks are disabled.

.var.name

[character(1)]
Name of the checked object to print in assertions. Defaults to the heuristic implemented in vname.

add

[AssertCollection]
Collection to store assertion messages. See AssertCollection.

info

[character(1)]
Extra information to be included in the message for the testthat reporter. See expect_that.

label

[character(1)]
Name of the checked object to print in messages. Defaults to the heuristic implemented in vname.

Value

Depending on the function prefix: If the check is successful, the functions

assertEnvironment/assert_environment return

x invisibly, whereas

checkEnvironment/check_environment and

testEnvironment/test_environment return

TRUE. If the check is not successful,

assertEnvironment/assert_environment

throws an error message,

testEnvironment/test_environment

returns FALSE, and checkEnvironment/check_environment

return a string with the error message. The function expect_environment always returns an

expectation.

See also

Other basetypes: checkArray(), checkAtomicVector(), checkAtomic(), checkCharacter(), checkComplex(), checkDataFrame(), checkDate(), checkDouble(), checkFactor(), checkFormula(), checkFunction(), checkIntegerish(), checkInteger(), checkList(), checkLogical(), checkMatrix(), checkNull(), checkNumeric(), checkPOSIXct(), checkRaw(), checkVector()

Examples

ee = as.environment(list(a = 1))
testEnvironment(ee)
#> [1] TRUE
testEnvironment(ee, contains = "a")
#> [1] TRUE