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allow using inspect inside __tostring metamethods without errors

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This commit is contained in:
Enrique García Cota
2018-04-06 23:14:00 +02:00
parent bebc212672
commit b611db6bfa
2 changed files with 10 additions and 43 deletions
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37
spec/inspect_spec.lua
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@@ -363,32 +363,17 @@ describe( 'inspect', function()
]]), inspect(bar))
end)
it('includes the __tostring metamethod if it exists', function()
local foo = { foo = 1, __tostring = function() return 'hello\nworld' end }
local bar = setmetatable({a = 1}, foo)
it('can be used on the __tostring metamethod of a table without errors', function()
local f = function(x) return inspect(x) end
local tbl = setmetatable({ x = 1 }, { __tostring = f })
assert.equals(unindent([[
{ -- hello\nworld
a = 1,
{
x = 1,
<metatable> = {
__tostring = <function 1>,
foo = 1
__tostring = <function 1>
}
}
]]), inspect(bar))
end)
it('includes an error string if __tostring metamethod throws an error', function()
local foo = { foo = 1, __tostring = function() error('hello', 0) end }
local bar = setmetatable({a = 1}, foo)
assert.equals(unindent([[
{ -- error: hello
a = 1,
<metatable> = {
__tostring = <function 1>,
foo = 1
}
}
]]), inspect(bar))
]]), tostring(tbl))
end)
it('does not allow collecting weak tables while they are being inspected', function()
@@ -397,18 +382,16 @@ describe( 'inspect', function()
local shimMetatable = {
__mode = 'v',
__index = function() return {} end,
__tostring = function() collectgarbage() return 'shim' end
}
local function shim() return setmetatable({}, shimMetatable) end
local t = shim()
t.key = shim()
assert.equals(unindent([[
{ -- shim
key = { -- shim
{
key = {
<metatable> = <1>{
__index = <function 1>,
__mode = "v",
__tostring = <function 2>
__mode = "v"
}
},
<metatable> = <table 1>