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Code Issues Releases Wiki Activity

Forbid mutating empty_json_array

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It's definitely still possible (rawset), but should prevent people
accidentally trying to modify it when they shouldn't.
This commit is contained in:
SquidDev 2019-05-30 20:01:09 +01:00
parent 0cb659d78c
commit e839ef54af
2 changed files with 12 additions and 1 deletions
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6
src/main/resources/assets/computercraft/lua/rom/apis/textutils.lua
View File

@ -240,7 +240,11 @@ local function serializeImpl( t, tTracking, sIndent )
end end
end end
empty_json_array = {} empty_json_array = setmetatable({}, {
__newindex = function()
error("attempt to mutate textutils.empty_json_array", 2)
end
})
local function serializeJSONImpl( t, tTracking, bNBTStyle ) local function serializeJSONImpl( t, tTracking, bNBTStyle )
local sType = type(t) local sType = type(t)

7
src/test/resources/test-rom/spec/apis/textutils_spec.lua
View File

@ -20,6 +20,13 @@ describe("The textutils library", function()
end) end)
end) end)
describe("textutils.empty_json_array", function()
it("is immutable", function()
expect.error(function() textutils.empty_json_array[1] = true end)
:eq("textutils_spec.lua:25: attempt to mutate textutils.empty_json_array")
end)
end)
describe("textutils.unserialise", function() describe("textutils.unserialise", function()
it("validates arguments", function() it("validates arguments", function()
textutils.unserialise("") textutils.unserialise("")