1describe("Lua version compatibility", function()
 2	describe("os.execute return value", function()
 3		it("returns true for successful commands", function()
 4			local success = os.execute("true")
 5			assert.is_true(success == true or success == 0)
 6		end)
 7
 8		it("returns non-true for failed commands", function()
 9			local success = os.execute("false")
10			assert.is_not_true(success == true)
11		end)
12	end)
13
14	describe("load() with 4 arguments", function()
15		it("works with mode and env parameters", function()
16			local chunk = load("return 42", "test", "t", {})
17			assert.is_function(chunk)
18			assert.are.equal(42, chunk())
19		end)
20
21		it("respects restricted environment", function()
22			local chunk = load("return { x = 1, y = 2 }", "test", "t", {})
23			assert.is_function(chunk)
24			local result = chunk()
25			assert.are.equal(1, result.x)
26			assert.are.equal(2, result.y)
27		end)
28	end)
29
30	describe("string patterns used in wt", function()
31		it("matches git URL project names", function()
32			local url = "git@github.com:user/project.git"
33			local name = url:match("([^/]+)%.git$") or url:match("([^/:]+)$")
34			assert.are.equal("project", name)
35		end)
36
37		it("matches https URL project names", function()
38			local url = "https://github.com/user/project.git"
39			local name = url:match("([^/]+)%.git$") or url:match("([^/:]+)$")
40			assert.are.equal("project", name)
41		end)
42
43		it("handles gitdir patterns", function()
44			local content = "gitdir: .bare"
45			assert.is_truthy(content:match("gitdir:%s*%.?/?%.bare"))
46		end)
47	end)
48
49	describe("io.popen", function()
50		it("captures command output", function()
51			local handle = io.popen("echo hello")
52			assert.is_not_nil(handle)
53			local output = handle:read("*a")
54			handle:close()
55			assert.are.equal("hello\n", output)
56		end)
57	end)
58end)