testthat (version 0.8.1)

prints_text: Expectation: does printed output match a regular expression?

Description

Expectation: does printed output match a regular expression?

Usage

prints_text(regexp, ...)
expect_output(object, regexp, ..., info = NULL, label = NULL)

Arguments

regexp

regular expression to test against

...

other arguments passed to matches

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-compare, expect_less_than, expect_more_than, is_less_than, is_more_than; expect_equivalent, is_equivalent_to; expect_error, throws_error; expect_false, is_false; expect_identical, is_identical_to; expect_is, is_a; expect_match, matches; expect_message, shows_message; expect_named, has_names; expect_null, is_null; expect_true, is_true; expect_warning, gives_warning; takes_less_than

Examples

str(mtcars)
expect_that(str(mtcars), prints_text("32 obs"))
expect_that(str(mtcars), prints_text("11 variables"))
expect_output(str(mtcars), "11 variables")

# You can use the arguments of grepl to control the matching
expect_output(str(mtcars), "11 VARIABLES", ignore.case = TRUE)
expect_output(str(mtcars), "$ mpg", fixed = TRUE)