add `ls` test

tests/testmultistreamselect.nim

@@ -1,9 +1,9 @@
-import unittest, strutils, sequtils
+import unittest, strutils, sequtils, sugar
 import chronos
 import ../libp2p/connection, ../libp2p/multistreamselect, 
   ../libp2p/readerwriter, ../libp2p/connection
 
-## Stream for select test
+## Mock stream for select test
 type
   TestSelectStream = ref object of ReadWrite
     step*: int
@@ -34,7 +34,7 @@ proc newTestSelectStream(): TestSelectStream =
   new result
   result.step = 1
 
-## Stream for handles test
+## Mock stream for handles test
 type
   TestHandlesStream = ref object of ReadWrite
     step*: int
@@ -65,15 +65,54 @@ proc newTestHandlesStream(): TestHandlesStream =
   new result
   result.step = 1
 
-suite "Multistream select":
-  # test "test select custom proto":
-  #   proc testSelect(): Future[bool] {.async.} =
-  #     let ms = newMultistream()
-  #     let conn = newConnection(newTestSelectStream())
-  #     result = await ms.select(conn, "/test/proto/1.0.0")
+## Mock stream for handles test
+type
+  LsHandler = proc(procs: seq[byte]): Future[void]
 
-  #   check:
-  #     waitFor(testSelect()) == true
+  TestLsStream = ref object of ReadWrite
+    step*: int
+    ls*: proc(procs: seq[byte]): Future[void]
+
+method readExactly*(s: TestLsStream, pbytes: pointer, nbytes: int): Future[void] {.async.} =
+  case s.step:
+    of 1:
+      var buf = newSeq[byte](1)
+      buf[0] = 19
+      copyMem(cast[pointer](cast[uint](pbytes)), addr buf[0], buf.len())
+      s.step = 2
+    of 2:
+      var buf = "/multistream/1.0.0\n"
+      copyMem(cast[pointer](cast[uint](pbytes)), addr buf[0], buf.len())
+      s.step = 3
+    of 3:
+      var buf = newSeq[byte](1)
+      buf[0] = 3
+      copyMem(cast[pointer](cast[uint](pbytes)), addr buf[0], buf.len())
+      s.step = 4
+    of 4:
+      var buf = "ls\n"
+      copyMem(cast[pointer](cast[uint](pbytes)), addr buf[0], buf.len())
+    else: 
+      copyMem(cast[pointer](cast[uint](pbytes)), cstring("\0x3na\n"), "\0x3na\n".len())
+
+method write*(s: TestLsStream, msg: seq[byte], msglen = -1) {.async.} =
+  if s.step == 4:
+    await s.ls(msg)
+
+proc newTestLsStream(ls: LsHandler): TestLsStream =
+  new result
+  result.ls = ls
+  result.step = 1
+
+suite "Multistream select":
+  test "test select custom proto":
+    proc testSelect(): Future[bool] {.async.} =
+      let ms = newMultistream()
+      let conn = newConnection(newTestSelectStream())
+      result = await ms.select(conn, "/test/proto/1.0.0")
+
+    check:
+      waitFor(testSelect()) == true
 
   test "test handle custom proto":
     proc testHandle(): Future[bool] {.async.} =
@@ -89,3 +128,25 @@ suite "Multistream select":
 
     check:
       waitFor(testHandle()) == true
+  
+  test "test handle `ls`":
+    proc testLs(): Future[bool] {.async.} =
+      let ms = newMultistream()
+
+      proc testLs(proto: seq[byte]): Future[void] {.async.}
+      let conn = newConnection(newTestLsStream(testLs))
+
+      let protos: seq[string] = @["\x13/test/proto1/1.0.0\n", "\x13/test/proto2/1.0.0\n"]
+      proc testLs(proto: seq[byte]): Future[void] {.async.} =
+        var strProto: string = cast[string](proto)
+        check strProto in protos
+        await conn.close()
+
+      proc testHandler(conn: Connection, proto: string): Future[void] {.async.} = discard
+      ms.addHandler("/test/proto1/1.0.0", testHandler)
+      ms.addHandler("/test/proto2/1.0.0", testHandler)
+      await ms.handle(conn)
+      result = true
+
+    check:
+      waitFor(testLs()) == true