make tests/stdlib tests joinable (#14626)

* make tests/stdlib tests joinable

* fixup

tests/stdlib/tcgi.nim

@@ -1,3 +1,9 @@
+discard """
+  output: '''
+[Suite] Test cgi module
+'''
+"""
+
 import unittest
 import cgi, strtabs
 

tests/stdlib/tfdleak.nim

@@ -2,6 +2,7 @@ discard """
   exitcode: 0
   output: ""
   matrix: "; -d:nimInheritHandles"
+  joinable: false
 """
 
 import os, osproc, strutils, nativesockets, net, selectors, memfiles,

tests/stdlib/tfdleak_multiple.nim

@@ -1,3 +1,7 @@
+discard """
+joinable: false
+"""
+
 import os, osproc, strutils
 
 const Iterations = 200

tests/stdlib/tmarshal.nim

@@ -5,8 +5,13 @@ true
 alpha 100
 omega 200
 '''
+joinable: false
 """
 
+#[
+joinable: false pending https://github.com/nim-lang/Nim/issues/9754
+]#
+
 import marshal
 
 template testit(x) = discard $$to[type(x)]($$x)

tests/stdlib/tnetbind.nim

@@ -1,3 +1,13 @@
+discard """
+joinable: false
+"""
+
+#[
+joinable: false
+otherwise:
+Error: unhandled exception: Address already in use [OSError]
+]#
+
 import net
 
 ## Test for net.bindAddr

tests/stdlib/tosproc.nim

@@ -1,4 +1,11 @@
-# test the osproc module
+discard """
+joinable: false
+"""
+
+#[
+joinable: false
+because it'd need cleanup up stdout
+]#
 
 import stdtest/[specialpaths, unittest_light]
 

tests/stdlib/trst.nim

@@ -1,3 +1,9 @@
+discard """
+  output: '''
+[Suite] RST include directive
+'''
+"""
+
 # tests for rst module
 
 import ../../lib/packages/docutils/rstgen

tests/stdlib/tstrutil.nim

@@ -1,6 +1,3 @@
-discard """
-  output: "ha/home/a1xyz/usr/bin"
-"""
 # test the new strutils module
 
 import
@@ -15,7 +12,7 @@ template rejectParse(e) =
   except ValueError: discard
 
 proc testStrip() =
-  write(stdout, strip("  ha  "))
+  doAssert strip("  ha  ") == "ha"
 
 proc testRemoveSuffix =
   var s = "hello\n\r"
@@ -143,8 +140,9 @@ proc main() =
   testStrip()
   testRemoveSuffix()
   testRemovePrefix()
-  for p in split("/home/a1:xyz:/usr/bin", {':'}):
-    write(stdout, p)
+  var ret: seq[string] # or use `toSeq`
+  for p in split("/home/a1:xyz:/usr/bin", {':'}): ret.add p
+  doAssert ret == @["/home/a1", "xyz", "/usr/bin"]
 
 proc testDelete =
   var s = "0123456789ABCDEFGH"