Move common libs to libs/common

libs/common/rebulk/test/test_toposort.py

@@ -0,0 +1,111 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright 2014 True Blade Systems, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Original:
+#   - https://bitbucket.org/ericvsmith/toposort (1.4)
+# Modifications:
+#   - port to pytest
+# pylint: skip-file
+
+import pytest
+from ..toposort import toposort, toposort_flatten, CyclicDependency
+
+
+class TestCase(object):
+    def test_simple(self):
+        results = list(toposort({2: set([11]), 9: set([11, 8]), 10: set([11, 3]), 11: set([7, 5]), 8: set([7, 3])}))
+        expected = [set([3, 5, 7]), set([8, 11]), set([2, 9, 10])]
+        assert results == expected
+
+        # make sure self dependencies are ignored
+        results = list(toposort({2: set([2, 11]), 9: set([11, 8]), 10: set([10, 11, 3]), 11: set([7, 5]), 8: set([7, 3])}))
+        expected = [set([3, 5, 7]), set([8, 11]), set([2, 9, 10])]
+        assert results == expected
+
+        assert list(toposort({1: set()})) == [set([1])]
+        assert list(toposort({1: set([1])})) == [set([1])]
+
+    def test_no_dependencies(self):
+        assert list(toposort({1: set([2]), 3: set([4]), 5: set([6])})) == [set([2, 4, 6]), set([1, 3, 5])]
+        assert list(toposort({1: set(), 3: set(), 5: set()})) == [set([1, 3, 5])]
+
+    def test_empty(self):
+        assert list(toposort({})) == []
+
+    def test_strings(self):
+        results = list(toposort({'2': set(['11']), '9': set(['11', '8']), '10': set(['11', '3']), '11': set(['7', '5']), '8': set(['7', '3'])}))
+        expected = [set(['3', '5', '7']), set(['8', '11']), set(['2', '9', '10'])]
+        assert results == expected
+
+    def test_objects(self):
+        o2 = object()
+        o3 = object()
+        o5 = object()
+        o7 = object()
+        o8 = object()
+        o9 = object()
+        o10 = object()
+        o11 = object()
+        results = list(toposort({o2: set([o11]), o9: set([o11, o8]), o10: set([o11, o3]), o11: set([o7, o5]), o8: set([o7, o3, o8])}))
+        expected = [set([o3, o5, o7]), set([o8, o11]), set([o2, o9, o10])]
+        assert results == expected
+
+    def test_cycle(self):
+        # a simple, 2 element cycle
+        with pytest.raises(CyclicDependency):
+            list(toposort({1: set([2]), 2: set([1])}))
+
+        # an indirect cycle
+        with pytest.raises(CyclicDependency):
+            list(toposort({1: set([2]), 2: set([3]), 3: set([1])}))
+
+    def test_input_not_modified(self):
+        data = {2: set([11]),
+                9: set([11, 8]),
+                10: set([11, 3]),
+                11: set([7, 5]),
+                8: set([7, 3, 8]),  # includes something self-referential
+                }
+        orig = data.copy()
+        results = list(toposort(data))
+        assert data == orig
+
+    def test_input_not_modified_when_cycle_error(self):
+        data = {1: set([2]),
+                2: set([1]),
+                3: set([4]),
+                }
+        orig = data.copy()
+        with pytest.raises(CyclicDependency):
+            list(toposort(data))
+        assert data == orig
+
+
+class TestCaseAll(object):
+    def test_sort_flatten(self):
+        data = {2: set([11]),
+                9: set([11, 8]),
+                10: set([11, 3]),
+                11: set([7, 5]),
+                8: set([7, 3, 8]),  # includes something self-referential
+                }
+        expected = [set([3, 5, 7]), set([8, 11]), set([2, 9, 10])]
+        assert list(toposort(data)) == expected
+
+        # now check the sorted results
+        results = []
+        for item in expected:
+            results.extend(sorted(item))
+        assert toposort_flatten(data) == results
+
+        # and the unsorted results. break the results up into groups to compare them
+        actual = toposort_flatten(data, False)
+        results = [set([i for i in actual[0:3]]), set([i for i in actual[3:5]]), set([i for i in actual[5:8]])]
+        assert results == expected