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Break apart plugin reconciler (#332)
* Start splitting apart reconciler, with tests * Reify children in reify * Baseline hydrate implementation * Remove debug print * Scaffold out diff implementation, just supporting name changes * invariant -> error in decodeValue * Flesh out diff and add getProperty * Clear out top-level reconciler interface, start updating code that touches it * Address review feedback * Add (experimental) Selene configuration * Add emptiness checks to PatchSet, remove unimplement invert method * Improve descendant destruction behavior in InstanceMap * Track instanceId on all reify errors * Base implementation of applyPatch, returning partial patches on failure * Change reify to accept InstanceMap and insert instances into it * Start testing applyPatch for removals * Add test for applyPatch adding instances successfully and not * Add , which is just error with formatting * Correctly use new diff and applyPatch APIs * Improve applyPatch logging and fix field name typo * Better debug output when reify fails * Print out unapplied patch in debug mode * Don't write properties if their values are not different. This was exposed trying to sync the Rojo plugin, which has a gigantic ModuleScript in it with the reflection database. This workaround was present in some form in many versions of Rojo, and I guess we still need it. This time, I actually documented why it's here so that I don't forget for the umpteenth time... * Add placeholder test that needs to happen still * Introduce easier plugin testing, write applyPatch properties test * Delete legacy get/setCanonicalProperty files * Fix trying to remove numbers instead of instances * Change applyPatch to return partial patches instead of binary success * Work towards being able to decode and apply refs * Add helpers for PatchSet assertions * Apply refs in reify, test all cases * Improve diagnostics when patches fail to apply * Stop logging when destroying untracked instances, it's ok * Remove read before setting property in applyPatch * Fix diff thinking all properties are changed
This commit is contained in:
Lucien Greathouse
committed by
GitHub
GitHub
parent
50f0a2bd2e
commit
f66860bdfe
159
plugin/src/Reconciler/applyPatch.spec.lua
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159
plugin/src/Reconciler/applyPatch.spec.lua
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@@ -0,0 +1,159 @@
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return function()
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local applyPatch = require(script.Parent.applyPatch)
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local InstanceMap = require(script.Parent.Parent.InstanceMap)
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local PatchSet = require(script.Parent.Parent.PatchSet)
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local dummy = Instance.new("Folder")
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local function wasDestroyed(instance)
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-- If an instance was destroyed, its parent property is locked.
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local ok = pcall(function()
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local oldParent = instance.Parent
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instance.Parent = dummy
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instance.Parent = oldParent
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end)
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return not ok
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end
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it("should return an empty patch if given an empty patch", function()
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local patch = applyPatch(InstanceMap.new(), PatchSet.newEmpty())
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assert(PatchSet.isEmpty(patch), "expected remaining patch to be empty")
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end)
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it("should destroy instances listed for remove", function()
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local root = Instance.new("Folder")
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local child = Instance.new("Folder")
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child.Name = "Child"
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child.Parent = root
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local instanceMap = InstanceMap.new()
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instanceMap:insert("ROOT", root)
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instanceMap:insert("CHILD", child)
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local patch = PatchSet.newEmpty()
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table.insert(patch.removed, child)
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local unapplied = applyPatch(instanceMap, patch)
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assert(PatchSet.isEmpty(unapplied), "expected remaining patch to be empty")
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assert(not wasDestroyed(root), "expected root to be left alone")
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assert(wasDestroyed(child), "expected child to be destroyed")
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instanceMap:stop()
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end)
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it("should destroy IDs listed for remove", function()
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local root = Instance.new("Folder")
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local child = Instance.new("Folder")
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child.Name = "Child"
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child.Parent = root
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local instanceMap = InstanceMap.new()
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instanceMap:insert("ROOT", root)
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instanceMap:insert("CHILD", child)
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local patch = PatchSet.newEmpty()
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table.insert(patch.removed, "CHILD")
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local unapplied = applyPatch(instanceMap, patch)
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assert(PatchSet.isEmpty(unapplied), "expected remaining patch to be empty")
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expect(instanceMap:size()).to.equal(1)
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assert(not wasDestroyed(root), "expected root to be left alone")
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assert(wasDestroyed(child), "expected child to be destroyed")
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instanceMap:stop()
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end)
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it("should add instances to the DOM", function()
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-- Many of the details of this functionality are instead covered by
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-- tests on reify, not here.
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local root = Instance.new("Folder")
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local instanceMap = InstanceMap.new()
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instanceMap:insert("ROOT", root)
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local patch = PatchSet.newEmpty()
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patch.added["CHILD"] = {
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Id = "CHILD",
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ClassName = "Model",
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Name = "Child",
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Parent = "ROOT",
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Children = {"GRANDCHILD"},
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Properties = {},
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}
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patch.added["GRANDCHILD"] = {
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Id = "GRANDCHILD",
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ClassName = "Part",
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Name = "Grandchild",
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Parent = "CHILD",
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Children = {},
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Properties = {},
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}
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local unapplied = applyPatch(instanceMap, patch)
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assert(PatchSet.isEmpty(unapplied), "expected remaining patch to be empty")
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expect(instanceMap:size()).to.equal(3)
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local child = root:FindFirstChild("Child")
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expect(child).to.be.ok()
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expect(child.ClassName).to.equal("Model")
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expect(child).to.equal(instanceMap.fromIds["CHILD"])
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local grandchild = child:FindFirstChild("Grandchild")
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expect(grandchild).to.be.ok()
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expect(grandchild.ClassName).to.equal("Part")
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expect(grandchild).to.equal(instanceMap.fromIds["GRANDCHILD"])
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end)
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it("should return unapplied additions when instances cannot be created", function()
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local root = Instance.new("Folder")
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local instanceMap = InstanceMap.new()
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instanceMap:insert("ROOT", root)
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local patch = PatchSet.newEmpty()
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patch.added["OOPSIE"] = {
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Id = "OOPSIE",
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-- Hopefully Roblox never makes an instance with this ClassName.
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ClassName = "UH OH",
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Name = "FUBAR",
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Parent = "ROOT",
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Children = {},
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Properties = {},
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}
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local unapplied = applyPatch(instanceMap, patch)
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expect(unapplied.added["OOPSIE"]).to.equal(patch.added["OOPSIE"])
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expect(instanceMap:size()).to.equal(1)
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expect(#root:GetChildren()).to.equal(0)
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end)
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it("should apply property changes to instances", function()
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local value = Instance.new("StringValue")
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value.Value = "HELLO"
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local instanceMap = InstanceMap.new()
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instanceMap:insert("VALUE", value)
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local patch = PatchSet.newEmpty()
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table.insert(patch.updated, {
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id = "VALUE",
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changedProperties = {
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Value = {
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Type = "String",
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Value = "WORLD",
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},
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},
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})
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local unapplied = applyPatch(instanceMap, patch)
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assert(PatchSet.isEmpty(unapplied), "expected remaining patch to be empty")
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expect(value.Value).to.equal("WORLD")
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end)
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end
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