Add factory.fuzzy (Closes #41).

1 files changed, 104 insertions, 0 deletions

diff --git a/tests/test_fuzzy.py b/tests/test_fuzzy.py
new file mode 100644
index 0000000..70a2095
--- /dev/null
+++ b/tests/test_fuzzy.py
@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2010 Mark Sandstrom
+# Copyright (c) 2011-2013 Raphaël Barrois
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+
+from factory import fuzzy
+
+from .compat import mock, unittest
+
+
+class FuzzyAttributeTestCase(unittest.TestCase):
+    def test_simple_call(self):
+        d = fuzzy.FuzzyAttribute(lambda: 10)
+
+        res = d.evaluate(2, None, False)
+        self.assertEqual(10, res)
+
+        res = d.evaluate(2, None, False)
+        self.assertEqual(10, res)
+
+
+class FuzzyChoiceTestCase(unittest.TestCase):
+    def test_unbiased(self):
+        options = [1, 2, 3]
+        d = fuzzy.FuzzyChoice(options)
+        res = d.evaluate(2, None, False)
+        self.assertIn(res, options)
+
+    def test_mock(self):
+        options = [1, 2, 3]
+        fake_choice = lambda d: sum(d)
+
+        d = fuzzy.FuzzyChoice(options)
+
+        with mock.patch('random.choice', fake_choice):
+            res = d.evaluate(2, None, False)
+
+        self.assertEqual(6, res)
+
+    def test_generator(self):
+        def options():
+            for i in range(3):
+                yield i
+        
+        d = fuzzy.FuzzyChoice(options())
+
+        res = d.evaluate(2, None, False)
+        self.assertIn(res, [0, 1, 2])
+
+        # And repeat
+        res = d.evaluate(2, None, False)
+        self.assertIn(res, [0, 1, 2])
+
+
+class FuzzyIntegerTestCase(unittest.TestCase):
+    def test_definition(self):
+        """Tests all ways of defining a FuzzyInteger."""
+        fuzz = fuzzy.FuzzyInteger(2, 3)
+        for _i in range(20):
+            res = fuzz.evaluate(2, None, False)
+            self.assertIn(res, [2, 3])
+
+        fuzz = fuzzy.FuzzyInteger(4)
+        for _i in range(20):
+            res = fuzz.evaluate(2, None, False)
+            self.assertIn(res, [0, 1, 2, 3, 4])
+
+    def test_biased(self):
+        fake_randint = lambda low, high: low + high
+
+        fuzz = fuzzy.FuzzyInteger(2, 8)
+
+        with mock.patch('random.randint', fake_randint):
+            res = fuzz.evaluate(2, None, False)
+
+        self.assertEqual(10, res)
+
+    def test_biased_high_only(self):
+        fake_randint = lambda low, high: low + high
+
+        fuzz = fuzzy.FuzzyInteger(8)
+
+        with mock.patch('random.randint', fake_randint):
+            res = fuzz.evaluate(2, None, False)
+
+        self.assertEqual(8, res)