1 files changed, 83 insertions, 0 deletions
diff --git a/service/test/unit/support/test_markov.py b/service/test/unit/support/test_markov.py
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+++ b/service/test/unit/support/test_markov.py
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+#
+# Copyright (c) 2015 ThoughtWorks, Inc.
+#
+# Pixelated is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Pixelated is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
+
+
+import unittest
+from pixelated.support.markov import MarkovGenerator
+import random
+
+
+SAMPLE_TEXT = 'One two three four'
+
+
+class MarkovGeneratorTest(unittest.TestCase):
+
+    def setUp(self):
+        self.random = random.Random(0)
+
+    def test_starts_with_capital_case_workd(self):
+        gen = MarkovGenerator(['lower Upper smaller Capital'], random=self.random)
+
+        result = gen.generate(1)
+
+        self.assertTrue(result.startswith('Upper'))
+
+    def test_aborts_if_no_upper_letter_word_found(self):
+        gen = MarkovGenerator(['all lower case'], random=self.random)
+
+        self.assertRaises(ValueError, gen.generate, 1)
+
+    def test_generate(self):
+        gen = MarkovGenerator([SAMPLE_TEXT], random=self.random)
+
+        result = gen.generate(3)
+
+        self.assertEqual('One two three', result)
+
+    def test_minimum_three_words(self):
+        self.assertRaises(ValueError, MarkovGenerator([]).generate, 1)
+        self.assertRaises(ValueError, MarkovGenerator, ['1'])
+        self.assertRaises(ValueError, MarkovGenerator, ['1', '2'])
+        self.assertRaises(ValueError, MarkovGenerator, ['1', '2', '3'])
+
+    def test_add_paragraph_on_empty_chain(self):
+        gen = MarkovGenerator([SAMPLE_TEXT], random=self.random, add_paragraph_on_empty_chain=True)
+
+        result = gen.generate(5)
+
+        self.assertEqual('One two three four \n\n One', result)
+
+    def test_multiple_inputs(self):
+        gen = MarkovGenerator([SAMPLE_TEXT, 'Five Six seven eight'], random=self.random)
+
+        result = gen.generate(3)
+
+        self.assertEqual('Five Six seven', result)
+
+    def test_add(self):
+        gen = MarkovGenerator([], random=self.random)
+
+        gen.add(SAMPLE_TEXT)
+        result = gen.generate(3)
+
+        self.assertEqual('One two three', result)
+
+    def test_multiple_word_occurences(self):
+        gen = MarkovGenerator(['One Two One Three One Two One Four'], random=self.random)
+
+        result = gen.generate(2)
+
+        self.assertEqual('Two One', result)