Wikipedia>Mr. Stradivarius: fix ValueMatcher import

2019-05-01T14:48:28Z

fix ValueMatcher import

New page

--- @classmod ProgrammableFn
--- Creates an easily programmable function for testing purposes.
-- Multiple behaviours can be defined.
-- A behaviour consists of a set of arguments and a set of return values.
-- If the function is called with these arguments it will return the programmed
-- return values.

local ValueMatcher = require 'Module:Lua-mock/ValueMatcher'

local ProgrammableFn = {}
ProgrammableFn.__index = ProgrammableFn

local function behaviourReturnValues( behaviour )
local next = behaviour.nextReturnSet

local returnSet = behaviour.returnSets[next]

if next < #behaviour.returnSets then
next = next + 1
else
next = 1
end
behaviour.nextReturnSet = next

return table.unpack(returnSet)
end

function ProgrammableFn:__call( ... )
local behaviour = self:_findMatchingBehaviour({...})
if not behaviour then
error('No matching behaviour for call.', 2)
end
return behaviourReturnValues(behaviour)
end

function ProgrammableFn:_findMatchingBehaviour( arguments )
for _,behaviour in ipairs(self.behaviours) do
if ValueMatcher.matches(arguments, behaviour.arguments) then
return behaviour
end
end
return nil
end

--- Creates a new behaviour entry or extends to one.
--
-- @param specification
-- The specification is a table, that contains the arguments that must match to
-- trigger this behaviour and the values that will be returned then.
-- Both are optional and can be passed like this:
-- `whenCalled{with={1,2}, thenReturn={3}}`
function ProgrammableFn:whenCalled( specification )
local arguments = specification.with or {}
local returnSet = specification.thenReturn or {}

local behaviour = self:_findMatchingBehaviour(arguments)
if behaviour then
table.insert(behaviour.returnSets, returnSet)
else
behaviour = {
arguments = arguments,
returnSets = { returnSet },
nextReturnSet = 1
}
table.insert(self.behaviours, behaviour)
end

return self
end

function ProgrammableFn:reset()
self.behaviours = {}
return self
end

return function()
local self = {
behaviours = {}
}
return setmetatable(self, ProgrammableFn)
end

Module:Lua-mock/ProgrammableFn - Revision history

Wikipedia>Mr. Stradivarius: fix ValueMatcher import