[CLIENT-3057] Add missing aerospike_helpers.expressions.resources.Res…

…ultType constant NIL (#658)

aerospike_helpers/expressions/resources.py

@@ -116,7 +116,7 @@ class ResultType:
  """
  Flags used to indicate expression value_type.
  """
-
+ NIL = 0
  BOOLEAN = 1
  INTEGER = 2
  STRING = 3

test/new_tests/test_expressions_map.py

@@ -163,7 +163,7 @@ class TestExpressions(TestBaseClass):
  def setup(self, request, as_connection):
  self.test_ns = "test"
  self.test_set = "demo"
-
+ self.first_key = (self.test_ns, self.test_set, 0)
  for i in range(_NUM_RECORDS):
  key = ("test", "demo", i)
  rec = {
@@ -828,7 +828,15 @@ def test_map_expr_inverted(self, bin_name: str, expr, expected):
  ops = [
  expr_ops.expression_read(bin_name, expr.compile())
  ]
- key = (self.test_ns, self.test_set, 0)
- _, _, bins = self.as_connection.operate(key, ops)
+ _, _, bins = self.as_connection.operate(self.first_key, ops)
 
  assert bins[bin_name] == expected
+
+ def test_map_get_nil_value_type(self):
+ bin_name = "nmap_bin"
+ exp = MapGetByKey(None, aerospike.MAP_RETURN_VALUE, ResultType.NIL, 2, bin_name).compile()
+ ops = [
+ expr_ops.expression_read(bin_name, exp)
+ ]
+ _, _, bins = self.as_connection.operate(self.first_key, ops)
+ assert bins[bin_name] is None