class-expectations: Class Expectations

In testextra: Extract Test Blocks

Description

These extend the testthat::expect_is to have finer grain tests.

Usage

expect_is_not(object, class, info = NULL, label = NULL)

expect_is_exactly(object, class, info = NULL, label = NULL)

expect_all_inherit(object, class, info = NULL, label = NULL)

Arguments

object	the object in question.
class	the expected class object is to be.
info	extra information to be included in the message (useful when writing tests in loops).
label	object label. When NULL, computed from deparsed object.

Functions

• expect_is_not: test that an object does not inherit from a class.

• expect_is_exactly: test that an object is exactly a specific class and not a child class.

• expect_all_inherit: test that all elements of a list inherit a given class.

See Also

Other class: class-tests

Examples

# Test to make sure an object is not of a class.
## Not run: 
# will return an error.
expect_is_not(1L, "numeric")

## End(Not run)

# but this is fine.
expect_is_not('a', "numeric")

expect_is_exactly('a', "character")

testextra documentation built on Dec. 18, 2019, 9:38 a.m.