mirror of
https://github.com/bakpakin/tiny-ecs.git
synced 2024-10-12 19:44:17 +00:00
144 lines
3.8 KiB
Lua
144 lines
3.8 KiB
Lua
local tiny = require "tiny"
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-- Taken from answer at http://stackoverflow.com/questions/640642/how-do-you-copy-a-lua-table-by-value
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local function deep_copy(o, seen)
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seen = seen or {}
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if o == nil then return nil end
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if seen[o] then return seen[o] end
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local no
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if type(o) == 'table' then
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no = {}
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seen[o] = no
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for k, v in next, o, nil do
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no[deep_copy(k, seen)] = deep_copy(v, seen)
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end
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setmetatable(no, deep_copy(getmetatable(o), seen))
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else -- number, string, boolean, etc
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no = o
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end
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return no
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end
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local entityTemplate1 = {
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xform = {x = 0, y = 0},
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vel = {x = 1, y = 2},
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name = "E1",
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size = 11,
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description = "It goes to 11.",
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spinalTap = true
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}
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local entityTemplate2 = {
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xform = {x = 2, y = 2},
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vel = {x = -1, y = 0},
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name = "E2",
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size = 10,
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description = "It does not go to 11.",
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onlyTen = true
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}
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local entityTemplate3 = {
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xform = {x = 4, y = 5},
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vel = {x = 0, y = 3},
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name = "E3",
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size = 8,
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description = "The smallest entity.",
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littleMan = true
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}
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describe('tiny-ecs:', function()
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describe('Filters:', function()
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local entity1, entity2, entity3
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before_each(function()
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entity1 = deep_copy(entityTemplate1)
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entity2 = deep_copy(entityTemplate2)
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entity3 = deep_copy(entityTemplate3)
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end)
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it("Default Filters", function()
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local ftap = tiny.requireAll("spinalTap")
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local fvel = tiny.requireAll("vel")
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local fxform = tiny.requireAll("xform")
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local fall = tiny.requireOne("spinalTap", "onlyTen", "littleMan")
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assert.truthy(fall(entity1))
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assert.truthy(ftap(entity1))
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assert.falsy(ftap(entity2))
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assert.truthy(fxform(entity1))
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assert.truthy(fxform(entity2))
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assert.truthy(fall(entity1))
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assert.truthy(fall(entity2))
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assert.truthy(fall(entity3))
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end)
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end)
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describe('World:', function()
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local world, entity1, entity2, entity3
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local moveSystem = tiny.processingSystem(
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tiny.requireAll("xform", "vel"),
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function(e, dt)
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local xform = e.xform
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local vel = e.vel
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local x, y = xform.x, xform.y
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local xvel, yvel = vel.x, vel.y
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xform.x, xform.y = x + xvel * dt, y + yvel * dt
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end
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)
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local timePassed = 0
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local oneTimeSystem = tiny.system(
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function(dt)
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timePassed = timePassed + dt
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end
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)
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before_each(function()
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entity1 = deep_copy(entityTemplate1)
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entity2 = deep_copy(entityTemplate2)
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entity3 = deep_copy(entityTemplate3)
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world = tiny.world(moveSystem, oneTimeSystem, entity1, entity2, entity3)
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timePassed = 0
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end)
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it("Create World", function()
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assert.equals(world.entityCount, 3)
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assert.equals(world.systemCount, 2)
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end)
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it("Run simple simulation", function()
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world:update(1)
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assert.equals(timePassed, 1)
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assert.equals(entity1.xform.x, 1)
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assert.equals(entity1.xform.y, 2)
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end)
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it("Remove Entities", function()
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world:remove(entity1, entity2)
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world:update(1)
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assert.equals(timePassed, 1)
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assert.equals(entity1.xform.x, entityTemplate1.xform.x)
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assert.equals(entity2.xform.x, entityTemplate2.xform.x)
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assert.equals(entity3.xform.y, 8)
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end)
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it("Remove Systems", function()
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world:remove(oneTimeSystem, moveSystem)
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world:update(1)
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assert.equals(timePassed, 0)
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assert.equals(entity1.xform.x, entityTemplate1.xform.x)
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end)
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end)
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end)
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