53 lines
1.1 KiB
Lua
53 lines
1.1 KiB
Lua
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local mock = mkmodule('test_util.mock')
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--[[
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Usage:
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patch(table, key, value, callback)
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patch({
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[{table, key}] = value,
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[{table2, key2}] = value2
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}, callback)
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]]
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function mock.patch(...)
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local args = {...}
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if #args == 4 then
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args = {{
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[{args[1], args[2]}] = args[3]
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}, args[4]}
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end
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if #args ~= 2 then
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error('expected 2 or 4 arguments')
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end
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local callback = args[2]
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local patches = {}
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for k, v in pairs(args[1]) do
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local p = {
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table = k[1],
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key = k[2],
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new_value = v,
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}
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p.old_value = p.table[p.key]
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-- no-op to ensure that the value can be restored by the finalizer below
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p.table[p.key] = p.table[p.key]
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table.insert(patches, p)
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end
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dfhack.with_finalize(
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function()
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for _, p in ipairs(patches) do
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p.table[p.key] = p.old_value
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end
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end,
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function()
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for _, p in ipairs(patches) do
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p.table[p.key] = p.new_value
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end
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callback()
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end
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)
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end
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return mock
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