tests: add unit test with equality check for local pids

rustler_tests/test/local_pid_test.exs

@@ -17,10 +17,19 @@ defmodule RustlerTest.LocalPidTest do
   test "local pid comparison" do
     # We make sure that the code we have in rust code matches the comparisons
     # that are performed in the BEAM code.
-    pids = Enum.sort(for _ <- 1..3, do: make_pid())
+    pids = for _ <- 1..3, do: make_pid()
 
     for lhs <- pids, rhs <- pids do
       assert RustlerTest.compare_local_pids(lhs, rhs) == compare(lhs, rhs)
     end
   end
+
+  test "local pid equality" do
+    pids = for _ <- 1..3, do: make_pid()
+
+    for lhs <- pids, rhs <- pids do
+      expected = lhs == rhs
+      assert RustlerTest.are_equal_local_pids(lhs, rhs) == expected
+    end
+  end
 end