Module with helper functions for defining Gherkin steps.

Defining steps

There are 3 helper macros that allows you to define steps for your feature specs:

• defgiven/3
• defwhen/3
• defthen/3

All with exactly the same syntax:

defgiven match(a, b) when "sum of {int} and {int}" do
  {:ok, sum: a + b}
end

Syntax for when part is identical with Watermelon.Expression.from/1 so you can provide either Regex or string. Matching groups are then the arguments for match function.

Context

Step definition can access and modify it's context which is a way to propagate values between different steps.

Return value can be one of:

• true
• :ok
• keyword list
• map
• tuple {:ok, map() | keyword()}

In case of keyword list or map, the returned values will be merged into current context. When it is :ok or true then the context will be left as is.

Context can be made available by using :context option:

defwhen match(a) when "I multiply sum by {int}", context: ctx do
  {:ok, result: a * ctx.sum}
end

TODO

• add support for data table
• add support for doc strings