testthat (version 0.6)

throws_error: Expectation: does expression throw an error?

Description

Expectation: does expression throw an error?

Usage

throws_error(regexp = NULL)
  expect_error(object, regexp = NULL, info = NULL,
    label = NULL)

Arguments

regexp

optional regular expression to match. If not specified, just asserts that expression throws some error.

object

object to test

info

extra information to be included in the message (useful when writing tests in loops).

label

object label. When NULL, computed from deparsed object.

See Also

Other expectations: equals, expect_equal, expect_equivalent, expect_false, expect_identical, expect_is, expect_match, expect_message, expect_output, expect_true, expect_warning, gives_warning, is_a, is_equivalent_to, is_false, is_identical_to, is_true, matches, prints_text, shows_message, takes_less_than

Examples

expect_that(log("a"), throws_error())
expect_error(log("a"))
expect_that(log("a"), throws_error("Non-numeric argument"))
expect_error(log("a"), "Non-numeric argument")