Expand test suite for stdio.format

tests/stdio/format.luau

@@ -1,13 +1,71 @@
+local process = require("@lune/process")
+local roblox = require("@lune/roblox")
 local stdio = require("@lune/stdio")
 
-assert(
+local function assertFormatting(errorMessage: string, formatted: string, expected: string)
-	stdio.format("Hello", "world", "!") == "Hello world !",
+	if formatted ~= expected then
-	"Format should add a single space between arguments"
+		stdio.ewrite(string.format("%s\nExpected: %s\nGot: %s", errorMessage, expected, formatted))
+		process.exit(1)
+	end
+end
+
+assertFormatting(
+	"Should add a single space between arguments",
+	stdio.format("Hello", "world", "!"),
+	"Hello world !"
 )
 
-assert(
+assertFormatting(
-	stdio.format({ Hello = "World" }) == '{\n    Hello = "World",\n}',
+	"Should format tables in a sorted manner",
-	"Format should print out proper tables"
+	stdio.format({ A = "A", B = "B", C = "C" }),
+	'{\n    A = "A",\n    B = "B",\n    C = "C",\n}'
+)
+
+assertFormatting(
+	"Should format tables properly with single values",
+	stdio.format({ Hello = "World" }),
+	'{\n    Hello = "World",\n}'
+)
+
+assertFormatting(
+	"Should format tables properly with multiple values",
+	stdio.format({ Hello = "World", Hello2 = "Value" }),
+	'{\n    Hello = "World",\n    Hello2 = "Value",\n}'
+)
+
+assertFormatting(
+	"Should simplify array-like tables and not format keys",
+	stdio.format({ "Hello", "World" }),
+	'{\n    "Hello",\n    "World",\n}'
+)
+
+assertFormatting(
+	"Should still format numeric keys for mixed tables",
+	stdio.format({ "Hello", "World", Hello = "World" }),
+	'{\n    [1] = "Hello",\n    [2] = "World",\n    Hello = "World",\n}'
+)
+
+local userdatas = {
+	Foo = newproxy(false),
+	Bar = (roblox :: any).Vector3.new(),
+}
+
+assertFormatting(
+	"Should format userdatas as their type (unknown userdata)",
+	stdio.format(userdatas.Foo),
+	"<userdata>"
+)
+
+assertFormatting(
+	"Should format userdatas as their type (known userdata)",
+	stdio.format(userdatas.Bar),
+	"<Vector3>"
+)
+
+assertFormatting(
+	"Should format userdatas as their type in tables",
+	stdio.format(userdatas),
+	"{\n    Foo = <userdata>,\n    Bar = <Vector3>,\n}"
 )
 
 local nested = {
@@ -24,5 +82,5 @@ local nested = {
 
 assert(
 	string.find(stdio.format(nested), "Nesting = { ... }", 1, true) ~= nil,
-	"Format should print 4 levels of nested tables before cutting off"
+	"Should print 4 levels of nested tables before cutting off"
 )