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return describe("using", function()
it("should prevent variable shadowing in assignment", function()
local tmp = 100
local i, k = 100, 50
local process
process = function(add)
local tmp = tmp + add
i = i + tmp
k = k + tmp
end
process(22)
assert.same(i, 222)
assert.same(k, 172)
return assert.same(tmp, 100)
end)
it("should handle multiple variable names", function()
local a, b, c = 1, 2, 3
local process
process = function(sum)
a = a + 1
b = b + 2
local c = sum + 100
end
process(10)
assert.same(a, 2)
assert.same(b, 4)
return assert.same(c, 3)
end)
it("should work with nil value", function()
local x = 1
local fn
fn = function(val)
if val ~= nil then
x = val
end
end
fn(100)
assert.same(x, 100)
return assert.is_true(x ~= 1)
end)
return it("should work with function calls", function()
local count = 0
local fn
fn = function(n)
count = count + n
end
fn(5)
return assert.same(count, 5)
end)
end)
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