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refactor: start charm-sync rewrite

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littensy 2025-09-29 18:11:39 -07:00
parent 4a07297a13
commit 079abaacc1
18 changed files with 468 additions and 560 deletions
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64
packages/charm-sync/src/__tests__/patch.spec.luau
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@ -1,15 +1,33 @@
local HttpService = game:GetService("HttpService")
local CharmSync = require("../")
local config = require("../config")
local patch = require("../patch")
local suite = require("../../../../test/suite")
local patch = CharmSync.patch
local test = suite.test
local afterEach = suite.afterEach
local function serdes(value: { [any]: any })
return HttpService:JSONDecode(HttpService:JSONEncode(value))
local function mockArraySerdes(object: { [any]: any }): { [any]: any }
if object[1] then
local copy = {}
for index = 1, #object do
copy[index] = object[index]
end
return copy
elseif table.maxn(object) ~= #object then
local copy = {}
for key, value in object do
copy[tostring(key)] = value
end
return copy
else
return object
end
end
afterEach(function()
config.autoSerialize = true
config.validatePatches = true
end)
test("returns a patch", function()
local prevState = { foo = "bar", baz = "qux" }
local nextState = { foo = "bar", baz = "quux" }
@ -60,7 +78,7 @@ test("preserves array density after serdes", function()
local prevState = { "a", "b", "c", "d", "e" }
local nextState = { "A", "b", "c", "D" }
local patches = serdes(patch.diff(prevState, nextState))
local patches = mockArraySerdes(patch.diff(prevState, nextState))
local applied = patch.apply(prevState, patches)
for index in next, prevState do
@ -72,27 +90,11 @@ test("preserves array density after serdes", function()
end
end)
test("preserves large gaps between keys", function()
local prevState = table.create(10000, "foo")
local nextState = table.move(prevState, 2, 9998, 2, { [1] = "bar", [9999] = "bar" })
local start = os.clock()
local patches = serdes(patch.diff(prevState, nextState))
local applied = patch.apply(prevState, patches)
assert(os.clock() - start < 10e-3, `Performance is not acceptable ({(os.clock() - start) * 1e3}ms)`)
for index in next, prevState do
assert(applied[index] == nextState[index], `expected {applied[index]} to be {nextState[index]}`)
end
end)
test("cannot preserve sparse arrays", function()
local prevState = {}
local nextState = { [2] = "foo" }
local patches = serdes(patch.diff(prevState, nextState))
local patches = mockArraySerdes(patch.diff(prevState, nextState))
local applied = patch.apply(prevState, patches)
-- Not enough information is available to determine whether 'patches'
@ -102,24 +104,30 @@ test("cannot preserve sparse arrays", function()
end)
test("optionally fixes sparse arrays", function()
for index in next, patch.diff({ 1, 1, 1, 1, 1 }, { 2, 1, 1, 2 }, true) do
config.autoSerialize = true
for index in next, patch.diff({ 1, 1, 1, 1, 1 }, { 2, 1, 1, 2 }) do
assert(type(index) == "string", `expected {type(index)} {index} to be string`)
end
for index in next, patch.diff({ 1, 1, 1, 1, 1 }, { 2, 1, 1, 2 }, false) do
config.autoSerialize = false
for index in next, patch.diff({ 1, 1, 1, 1, 1 }, { 2, 1, 1, 2 }) do
assert(type(index) == "number", `expected {type(index)} {index} to be number`)
end
end)
test("optionally validates state", function()
local success = pcall(function()
patch.diff({}, { [0.1] = true }, true)
config.validatePatches = true
patch.diff({}, { [0.1] = true })
end)
assert(not success, "should not allow non-integer keys")
success = pcall(function()
patch.diff({}, { [0.1] = true }, false)
config.validatePatches = false
patch.diff({}, { [0.1] = true })
end)
assert(success, "should skip validation if not requested")