Add test cases for unary +

See #1931.

Author: josevalim

lib/ex_doc/language/erlang.ex

@@ -538,8 +538,8 @@ defmodule ExDoc.Language.Erlang do
             {name, _, _}, acc when name in [:<<>>, :..] ->
               {nil, acc}
 
-            # -1
-            {:-, _, [int]}, acc when is_integer(int) ->
+            # -1, +1
+            {op, _, [int]}, acc when is_integer(int) and op in [:+, :-] ->
               {nil, acc}
 
             # fun() (spec_to_quoted expands it to (... -> any())

test/ex_doc/language/erlang_test.exs

@@ -767,6 +767,11 @@ defmodule ExDoc.Language.ErlangTest do
                ~s[foo() -> 1..255 | <a href="#t:t/0">t</a>().]
     end
 
+    test "integer unary", c do
+      assert autolink_spec(~s"-spec f(LimitedInteger :: +1 | -1) -> t().", c) ==
+               ~s[f(LimitedInteger :: +1 | -1) -> <a href="#t:t/0">t</a>().]
+    end
+
     test "function - any", c do
       assert autolink_spec(~s"-spec foo() -> fun() | t().", c) ==
                ~s[foo() -> fun() | <a href="#t:t/0">t</a>().]