Fixed #68: Implement SheerkaQL

Fixed #70: SheerkaFilterManager : Pipe functions
Fixed #71: SheerkaFilterManager : filter_objects
Fixed #75: SheerkaMemory: Enhance memory() to use the filtering capabilities
Fixed #76: SheerkaEvaluateConcept: Concepts that modify the state of the system must not be evaluated during question

tests/non_reg/test_sheerka_non_reg_pipe_functions.py

@@ -0,0 +1,85 @@
+from core.builtin_concepts_ids import BuiltinConcepts
+from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
+
+
+class TestSheerkaNonRegPipeFunctions(TestUsingMemoryBasedSheerka):
+    def test_i_can_filter_a_list_using_pipe(self):
+        init = [
+            "def concept one as 1",
+            "def concept two as 2",
+            "def concept three as 3",
+            "add_to_memory('x', [one, two, three])"
+        ]
+
+        sheerka = self.init_scenario(init)
+        res = sheerka.evaluate_user_input("x | where(body=2)")
+
+        assert len(res) == 1
+        assert res[0].status
+        assert isinstance(res[0].body, list)
+        assert len(res[0].body) == 1
+        assert sheerka.isinstance(res[0].body[0], "two")
+
+        res = sheerka.evaluate_user_input("x | where(__self=two)")
+        assert len(res) == 1
+        assert res[0].status
+        assert isinstance(res[0].body, list)
+        assert len(res[0].body) == 1
+        assert sheerka.isinstance(res[0].body[0], "two")
+
+    def test_i_can_filter_using_sheerka_methods(self):
+        init = [
+            "def concept one as 1",
+            "def concept number",
+            "set_isa(one, number)",
+            "add_to_memory('x', [one])"
+        ]
+
+        sheerka = self.init_scenario(init)
+        res = sheerka.evaluate_user_input("x | where('isa(self, number)')")
+
+        assert len(res) == 1
+        assert res[0].status
+        assert isinstance(res[0].body, list)
+        assert len(res[0].body) == 1
+        assert sheerka.isinstance(res[0].body[0], "one")
+
+    def test_i_can_select_properties(self):
+        init = [
+            "def concept one as 1",
+            "def concept two as 2",
+            "def concept three as 3",
+            "add_to_memory('x', [one, two, three])"
+        ]
+
+        sheerka = self.init_scenario(init)
+
+        res = sheerka.evaluate_user_input("x | select('id', 'name')")
+        assert len(res) == 1
+        assert res[0].status
+        assert res[0].body == (("1001", "one"), ("1002", "two"), ("1003", "three"))
+
+        res = sheerka.evaluate_user_input("x | select(p1='id', p2='name')")
+        assert len(res) == 1
+        assert res[0].status
+        assert res[0].body == ({"p1": "1001", "p2": "one"},
+                               {"p1": "1002", "p2": "two"},
+                               {"p1": "1003", "p2": "three"})
+
+    def test_i_can_collect_properties(self):
+        init = [
+            "def concept one as 1",
+            "def concept isa from x is a y def_var x def_var y",
+            "def concept plus from a plus b as a + b",
+            "add_to_memory('x', [one, isa, plus])"
+        ]
+
+        sheerka = self.init_scenario(init)
+        res = sheerka.evaluate_user_input("x | props()")
+
+        assert len(res) == 1
+        assert res[0].status
+        assert sheerka.isinstance(res[0].body, BuiltinConcepts.TO_DICT)
+        assert res[0].body.body == {'isa': ['body', 'id', 'key', 'name', 'x', 'y'],
+                                    'one': ['body', 'id', 'key', 'name'],
+                                    'plus': ['a', 'b', 'body', 'id', 'key', 'name']}