define_parameter_type | R Documentation |
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.
define_parameter_type(name, regexp, transformer)
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. |
An object of class parameter
, invisibly. Function should be called for side effects.
define_parameter_type("color", "red|blue|green", as.character)
define_parameter_type(
name = "sci_number",
regexp = "[+-]?\\\\d*\\\\.?\\\\d+(e[+-]?\\\\d+)?",
transform = as.double
)
## Not run:
#' tests/testthat/test-cucumber.R
cucumber::define_parameter_type("color", "red|blue|green", as.character)
cucumber::test(".", "./steps")
## End(Not run)
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