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|
local helper = require "spec.helper"
local function assert_warnings(warnings, src)
assert.same(warnings, helper.get_stage_warnings("detect_unreachable_code", src))
end
describe("unreachable code detection", function()
it("detects unreachable code", function()
assert_warnings({
{code = "511", line = 2, column = 1, end_column = 24}
}, [[
do return end
if ... then return 6 end
return 3
]])
assert_warnings({
{code = "511", line = 7, column = 1, end_column = 11},
{code = "511", line = 13, column = 1, end_column = 8}
}, [[
if ... then
return 4
else
return 6
end
if ... then
return 7
else
return 8
end
return 3
]])
end)
it("detects unreachable code with literal conditions", function()
assert_warnings({
{code = "511", line = 4, column = 1, end_column = 6}
}, [[
while true do
(...)()
end
return
]])
assert_warnings({}, [[
repeat
if ... then
break
end
until false
return
]])
assert_warnings({
{code = "511", line = 6, column = 1, end_column = 6}
}, [[
repeat
if nil then
break
end
until false
return
]])
end)
it("detects unreachable expressions", function()
assert_warnings({
{code = "511", line = 3, column = 7, end_column = 9}
}, [[
repeat
return
until ...
]])
assert_warnings({
{code = "511", line = 3, column = 8, end_column = 10}
}, [[
if true then
(...)()
elseif ... then
(...)()
end
]])
end)
it("detects unreachable functions", function()
assert_warnings({
{code = "511", line = 3, column = 1, end_column = 16}
}, [[
local f = nil
do return end
function f() end
]])
end)
it("detects unreachable code in nested function", function()
assert_warnings({
{code = "511", line = 4, column = 7, end_column = 12}
}, [[
return function()
return function()
do return end
return
end
end
]])
end)
it("detects unreachable code in unreachable nested function", function()
assert_warnings({
{code = "511", line = 4, column = 4, end_column = 20},
{code = "511", line = 6, column = 7, end_column = 12}
}, [[
return function()
do return end
return function()
do return end
return
end
end
]])
end)
end)
|
