From d3f8575e1268e4e756a27931763bd598ed9b1e24 Mon Sep 17 00:00:00 2001
From: Gunther Cox <gunthercx@gmail.com>
Date: Mon, 25 Jan 2016 17:46:10 -0500
Subject: [PATCH] Added tests for closest match adapter confidence.

These tests ensure that the confidence value returned by the
closest match adapter range between 0 and 1.
---
 chatterbot/adapters/logic/closest_match.py    |  3 ++
 .../logic_adapter_tests/test_closest_match.py | 38 +++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/chatterbot/adapters/logic/closest_match.py b/chatterbot/adapters/logic/closest_match.py
index 903efddaa..351182952 100644
--- a/chatterbot/adapters/logic/closest_match.py
+++ b/chatterbot/adapters/logic/closest_match.py
@@ -35,6 +35,9 @@ def get(self, input_statement, statement_list=None):
             limit=1
         )[0]
 
+        # Convert the confidence integer to a percent
+        confidence /= 100.0
+
         return confidence, next(
             (s for s in statement_list if s.text == closest_match), None
         )
diff --git a/tests/logic_adapter_tests/test_closest_match.py b/tests/logic_adapter_tests/test_closest_match.py
index 8bc21beeb..883e940ce 100644
--- a/tests/logic_adapter_tests/test_closest_match.py
+++ b/tests/logic_adapter_tests/test_closest_match.py
@@ -37,3 +37,41 @@ def test_get_closest_statement(self):
 
         self.assertEqual("What... is your quest?", match)
 
+    def test_confidence_exact_match(self):
+        possible_choices = [
+            Statement("What is your quest?", in_response_to=[Response("What is your quest?")])
+        ]
+
+        statement = Statement("What is your quest?")
+
+        confidence, match = self.adapter.get(
+            statement, possible_choices
+        )
+
+        self.assertEqual(confidence, 1)
+
+    def test_confidence_half_match(self):
+        possible_choices = [
+            Statement("xxyy", in_response_to=[Response("xxyy")])
+        ]
+
+        statement = Statement("wwxx")
+
+        confidence, match = self.adapter.get(
+            statement, possible_choices
+        )
+
+        self.assertEqual(confidence, 0.5)
+
+    def test_confidence_no_match(self):
+        possible_choices = [
+            Statement("xxx", in_response_to=[Response("xxx")])
+        ]
+
+        statement = Statement("yyy")
+
+        confidence, match = self.adapter.get(
+            statement, possible_choices
+        )
+
+        self.assertEqual(confidence, 0)