From 8c3d786157ec7fef3072feac55c2d5450800568b Mon Sep 17 00:00:00 2001
From: Li Jin <dragon-fly@qq.com>
Date: Fri, 30 Jan 2026 18:16:45 +0800
Subject: Added more tests.

---
 spec/outputs/test/using_spec.lua | 50 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 spec/outputs/test/using_spec.lua

(limited to 'spec/outputs/test/using_spec.lua')

diff --git a/spec/outputs/test/using_spec.lua b/spec/outputs/test/using_spec.lua
new file mode 100644
index 0000000..5c2f357
--- /dev/null
+++ b/spec/outputs/test/using_spec.lua
@@ -0,0 +1,50 @@
+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)
-- 
cgit v1.2.3-55-g6feb