Add tests

Author: thocevar

Orange/tests/test_value.py

@@ -5,7 +5,8 @@
 import unittest
 import numpy as np
 
-from Orange.data import Table, Domain, DiscreteVariable
+from Orange.data import Table, Domain, Value,\
+    DiscreteVariable, ContinuousVariable, StringVariable, TimeVariable
 
 
 class TestValue(unittest.TestCase):
@@ -50,3 +51,16 @@ def test_compare_string(self):
         zoo2 = zoo[1]['name']  # antelope
         self.assertTrue(zoo1 < zoo2)
         self.assertTrue(zoo1 >= "aardvark")
+
+    def test_hash(self):
+        v = 1234.5
+        val = Value(ContinuousVariable("var"), v)
+        self.assertTrue(val == v and hash(val) == hash(v))
+        v = "test"
+        val = Value(StringVariable("var"), v)
+        self.assertTrue(val == v and hash(val) == hash(v))
+        v = 1234.5
+        val = Value(TimeVariable("var"), v)
+        self.assertTrue(val == v and hash(val) == hash(v))
+        val = Value(DiscreteVariable("var", ["red", "green", "blue"]), 1)
+        self.assertRaises(Exception, hash, val)