fix #6736: templates in unittest now show actual value (#13354)

Author: narimiran

lib/pure/unittest.nim

@@ -631,7 +631,7 @@ macro check*(conditions: untyped): untyped =
 
     var counter = 0
 
-    if exp[0].kind == nnkIdent and
+    if exp[0].kind in {nnkIdent, nnkOpenSymChoice, nnkClosedSymChoice, nnkSym} and
         $exp[0] in ["not", "in", "notin", "==", "<=",
                     ">=", "<", ">", "!=", "is", "isnot"]:
 

tests/stdlib/tunittesttemplate.nim

@@ -0,0 +1,25 @@
+discard """
+  exitcode: 1
+  outputsub: '''
+    tunittesttemplate.nim(20, 12): Check failed: a.b ==
+    2
+    a.b was 0
+  [FAILED] 1
+'''
+"""
+
+# bug #6736
+
+import unittest
+
+type
+  A = object
+    b: int
+
+template t: untyped =
+  check(a.b == 2)
+
+suite "1":
+  test "1":
+    var a = A(b: 0)
+    t()