Add extended gac tests.

naive-nlu/tree_nlu/tests/gac_extension.py

@@ -0,0 +1,21 @@
+from ..knowledge_base import KnowledgeBase
+
+from . import gac_100
+
+
+def ask_then_learn_test(knowledge: KnowledgeBase):
+    ret, _, _ = knowledge.process("is icecream blue?")
+    assert(ret is False)
+
+    ret, _, _ = knowledge.process("icecream is blue")
+
+    ret, _, _ = knowledge.process("is icecream blue?")
+    assert(ret is True)
+
+    return knowledge
+
+
+def main():
+    knowledge = gac_100.main()
+
+    knowledge = ask_then_learn_test(knowledge)