cucumber (version 2.0.1)

define_parameter_type: Define extra parameters to use in Cucumber steps.

Description

The following parameter types are available by default:

Type	Description
{int}	Matches integers, for example 71 or -19. Converts value with as.integer.
{float}	Matches floats, for example 3.6, .8 or -9.2. Converts value with as.double.
{word}	Matches words without whitespace, for example banana (but not banana split).
{string}	Matches single-quoted or double-quoted strings, for example "banana split" or 'banana split' (but not banana split). Only the text between the quotes will be extracted. The quotes themselves are discarded.

To use custom parameter types, call define_parameter_type before cucumber::test is called.

Usage

define_parameter_type(name, regexp, transformer)

Value

An object of class parameter, invisibly. Function should be called for side effects.

Arguments

name

The name of the parameter.

regexp

A regular expression that the parameter will match on. Note that if you want to escape a special character, you need to use four backslashes.

transformer

A function that will transform the parameter from a string to the desired type. Must be a function that requires only a single argument.

Examples

define_parameter_type("color", "red|blue|green", as.character)
define_parameter_type(
  name = "sci_number",
  regexp = "[+-]?\\\\d*\\\\.?\\\\d+(e[+-]?\\\\d+)?",
  transform = as.double
)

if (FALSE) {
#' tests/testthat/test-cucumber.R
cucumber::define_parameter_type("color", "red|blue|green", as.character)
cucumber::test(".", "./steps")
}