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143 lines
3.0 KiB
Lua
143 lines
3.0 KiB
Lua
local t = require('test.testutil')
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local n = require('test.functional.testnvim')()
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local clear = n.clear
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local exec_lua = n.exec_lua
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local eq = t.eq
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describe('vim.func._memoize', function()
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before_each(clear)
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it('caches function results based on their parameters', function()
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exec_lua([[
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_G.count = 0
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local adder = vim.func._memoize('concat', function(arg1, arg2)
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_G.count = _G.count + 1
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return arg1 + arg2
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end)
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collectgarbage('stop')
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adder(3, -4)
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adder(3, -4)
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adder(3, -4)
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adder(3, -4)
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adder(3, -4)
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collectgarbage('restart')
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]])
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eq(1, exec_lua([[return _G.count]]))
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end)
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it('caches function results using a weak table by default', function()
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exec_lua([[
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_G.count = 0
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local adder = vim.func._memoize('concat-2', function(arg1, arg2)
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_G.count = _G.count + 1
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return arg1 + arg2
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end)
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adder(3, -4)
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collectgarbage()
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adder(3, -4)
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collectgarbage()
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adder(3, -4)
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]])
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eq(3, exec_lua([[return _G.count]]))
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end)
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it('can cache using a strong table', function()
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exec_lua([[
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_G.count = 0
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local adder = vim.func._memoize('concat-2', function(arg1, arg2)
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_G.count = _G.count + 1
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return arg1 + arg2
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end, false)
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adder(3, -4)
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collectgarbage()
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adder(3, -4)
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collectgarbage()
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adder(3, -4)
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]])
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eq(1, exec_lua([[return _G.count]]))
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end)
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it('can clear a single cache entry', function()
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exec_lua([[
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_G.count = 0
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local adder = vim.func._memoize(function(arg1, arg2)
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return tostring(arg1) .. '%%' .. tostring(arg2)
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end, function(arg1, arg2)
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_G.count = _G.count + 1
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return arg1 + arg2
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end)
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collectgarbage('stop')
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adder(3, -4)
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adder(3, -4)
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adder(3, -4)
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adder(3, -4)
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adder(3, -4)
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adder:clear(3, -4)
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adder(3, -4)
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collectgarbage('restart')
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]])
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eq(2, exec_lua([[return _G.count]]))
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end)
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it('can clear the entire cache', function()
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exec_lua([[
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_G.count = 0
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local adder = vim.func._memoize(function(arg1, arg2)
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return tostring(arg1) .. '%%' .. tostring(arg2)
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end, function(arg1, arg2)
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_G.count = _G.count + 1
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return arg1 + arg2
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end)
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collectgarbage('stop')
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adder(1, 2)
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adder(3, -4)
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adder(1, 2)
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adder(3, -4)
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adder(1, 2)
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adder(3, -4)
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adder:clear()
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adder(1, 2)
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adder(3, -4)
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collectgarbage('restart')
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]])
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eq(4, exec_lua([[return _G.count]]))
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end)
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it('can cache functions that return nil', function()
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exec_lua([[
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_G.count = 0
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local adder = vim.func._memoize('concat', function(arg1, arg2)
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_G.count = _G.count + 1
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return nil
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end)
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collectgarbage('stop')
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adder(1, 2)
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adder(1, 2)
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adder(1, 2)
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adder(1, 2)
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adder:clear()
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adder(1, 2)
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collectgarbage('restart')
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]])
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eq(2, exec_lua([[return _G.count]]))
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end)
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end)
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