chore(tests): add new process.spawn tests

tests/process/exec/async.luau

@@ -4,7 +4,7 @@ local task = require("@lune/task")
 
 local IS_WINDOWS = process.os == "windows"
 
--- Spawning a process should not block any lua thread(s)
+-- Executing a command should not block any lua thread(s)
 
 local SLEEP_DURATION = 1 / 4
 local SLEEP_SAMPLES = 2

tests/process/exec/basic.luau

@@ -2,7 +2,7 @@ local process = require("@lune/process")
 local stdio = require("@lune/stdio")
 local task = require("@lune/task")
 
--- Spawning a child process should work, with options
+-- Executing a comamnd should work, with options
 
 local thread = task.delay(1, function()
 	stdio.ewrite("Spawning a process should take a reasonable amount of time\n")

tests/process/exec/no_panic.luau

@@ -1,7 +1,7 @@
 local process = require("@lune/process")
 
--- Spawning a child process for a non-existent
--- program should not panic, but should error
+-- Executing a non existent command as a child process
+-- should not panic, but should error
 
 local success = pcall(process.exec, "someProgramThatDoesNotExist")
 assert(not success, "Spawned a non-existent program")

tests/process/spawn/non_blocking.luau

@@ -0,0 +1,18 @@
+local process = require("@lune/process")
+
+-- Spawning a child process should not block the main thread
+
+local SAMPLES = 400
+
+for _ = 1, SAMPLES do
+	local start = os.time()
+	local child = process.spawn("echo", { "hello, world" })
+
+	assert(child ~= nil, "Failed to spawn child process")
+
+	local delta = os.time() - start
+	assert(
+		delta <= 1,
+		`Spawning a child process should not block the main thread, process.spawn took {delta}s to return it should return immediately`
+	)
+end

tests/process/spawn/status.luau

@@ -0,0 +1,15 @@
+local process = require("@lune/process")
+
+-- The exit code of an child process should be correct
+
+local randomExitCode = math.random(1, 255)
+local isOk = randomExitCode == 0
+local child = process.spawn("exit", { tostring(randomExitCode) }, { shell = true })
+local status = child.status()
+
+assert(
+	status.code == randomExitCode,
+	`Child process exited with wrong exit code, expected {randomExitCode}`
+)
+
+assert(status.ok == isOk, `Child status should be {if status.ok then "ok" else "not ok"}`)

tests/process/spawn/stream.luau

@@ -0,0 +1,18 @@
+local process = require("@lune/process")
+
+-- Should be able to write and read from child process streams
+
+local msg = "hello, world"
+
+local catChild = process.spawn("cat")
+catChild.stdin:write(msg)
+assert(
+	msg == buffer.tostring(catChild.stdout:read(#msg)),
+	"Failed to write to stdin or read from stdout of child process"
+)
+
+local echoChild = process.spawn("echo", { msg, ">>/dev/stderr" }, { shell = true })
+assert(
+	msg == buffer.tostring(echoChild.stderr:read(#msg)),
+	"Failed to read from stderr of child process"
+)