document nim-lang#15618 (nim-lang#15810)

* document nim-lang#15618 * Update lib/pure/unittest.nim * Update lib/pure/unittest.nim Co-authored-by: Juan Carlos <juancarlospaco@gmail.com> * Update lib/pure/unittest.nim Co-authored-by: Andreas Rumpf <rumpf_a@web.de> Co-authored-by: Juan Carlos <juancarlospaco@gmail.com>
narimiran · Nov 5, 2020 · adde5ba · adde5ba
1 parent c4cc907
commit adde5ba
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/lib/pure/unittest.nim b/lib/pure/unittest.nim
@@ -92,6 +92,15 @@
 ##         discard v[4]
 ##
 ##     echo "suite teardown: run once after the tests"
+## 
+## Limitations/Bugs
+## ================
+## Since `check` will rewrite some programs for
+## supporting checkpoints (namely assigns expressions to variables).
+## Some type conversions are not supported.
+## For example `check 4.0 == 2 + 2` won't work. But `doAssert 4.0 == 2 + 2` works.
+## Make sure both sides of the operator (such as `==`, `>=` and so on) have the same type.
+##
 
 import std/private/since
 import std/exitprocs