246 lines
8.0 KiB
Python
246 lines
8.0 KiB
Python
# Copyright 2009 10gen, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Test the cursor module."""
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import unittest
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import types
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import random
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from test_connection import get_connection
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from pymongo.errors import InvalidOperation
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from pymongo.cursor import Cursor
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from pymongo.database import Database, ASCENDING, DESCENDING
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class TestCursor(unittest.TestCase):
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def setUp(self):
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self.db = Database(get_connection(), "test")
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def test_explain(self):
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a = self.db.test.find()
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explanation = a.explain()
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for _ in a:
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break
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self.assertEqual(a.explain(), explanation)
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self.assertTrue("cursor" in explanation)
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def test_hint(self):
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db = self.db
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self.assertRaises(TypeError, db.test.find().hint, 5.5)
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db.test.remove({})
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db.test.drop_indexes()
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for i in range(100):
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db.test.insert({"num": i, "foo": i})
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).hint([("num", ASCENDING)]
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).explain()["nscanned"], 100)
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).hint([("foo", ASCENDING)]
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).explain()["nscanned"], 100)
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index = db.test.create_index("num", ASCENDING)
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self.assertEqual(db.test.find({"num": 17}).explain()["nscanned"], 1)
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).explain()["nscanned"], 100)
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).hint(index).explain()["nscanned"], 1)
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).hint(index
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).hint(None
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).explain()["nscanned"], 100)
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).hint([("num", ASCENDING)]
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).explain()["nscanned"], 1)
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self.assertEqual(db.test.find({"num": 17, "foo": 17}
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).hint([("foo", ASCENDING)]
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).explain()["nscanned"], 100)
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a = db.test.find({"num": 17})
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a.hint(index)
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for _ in a:
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break
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self.assertRaises(InvalidOperation, a.hint, index)
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def test_limit(self):
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db = self.db
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self.assertRaises(TypeError, db.test.find().limit, None)
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self.assertRaises(TypeError, db.test.find().limit, "hello")
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self.assertRaises(TypeError, db.test.find().limit, 5.5)
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db.test.remove({})
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for i in range(100):
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db.test.save({"x": i})
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count = 0
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for _ in db.test.find():
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count += 1
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self.assertEqual(count, 100)
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count = 0
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for _ in db.test.find().limit(20):
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count += 1
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self.assertEqual(count, 20)
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count = 0
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for _ in db.test.find().limit(99):
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count += 1
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self.assertEqual(count, 99)
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count = 0
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for _ in db.test.find().limit(1):
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count += 1
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self.assertEqual(count, 1)
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count = 0
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for _ in db.test.find().limit(0):
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count += 1
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self.assertEqual(count, 100)
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count = 0
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for _ in db.test.find().limit(0).limit(50).limit(10):
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count += 1
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self.assertEqual(count, 10)
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a = db.test.find()
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a.limit(10)
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for _ in a:
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break
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self.assertRaises(InvalidOperation, a.limit, 5)
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def test_skip(self):
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db = self.db
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self.assertRaises(TypeError, db.test.find().skip, None)
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self.assertRaises(TypeError, db.test.find().skip, "hello")
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self.assertRaises(TypeError, db.test.find().skip, 5.5)
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db.drop_collection("test")
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for i in range(100):
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db.test.save({"x": i})
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for i in db.test.find():
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self.assertEqual(i["x"], 0)
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break
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for i in db.test.find().skip(20):
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self.assertEqual(i["x"], 20)
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break
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for i in db.test.find().skip(99):
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self.assertEqual(i["x"], 99)
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break
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for i in db.test.find().skip(1):
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self.assertEqual(i["x"], 1)
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break
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for i in db.test.find().skip(0):
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self.assertEqual(i["x"], 0)
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break
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for i in db.test.find().skip(0).skip(50).skip(10):
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self.assertEqual(i["x"], 10)
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break
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for i in db.test.find().skip(1000):
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self.fail()
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a = db.test.find()
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a.skip(10)
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for _ in a:
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break
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self.assertRaises(InvalidOperation, a.skip, 5)
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def test_sort(self):
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db = self.db
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self.assertRaises(TypeError, db.test.find().sort, 5)
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self.assertRaises(TypeError, db.test.find().sort, "hello")
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self.assertRaises(ValueError, db.test.find().sort, [])
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self.assertRaises(TypeError, db.test.find().sort, [], ASCENDING)
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self.assertRaises(TypeError, db.test.find().sort, [("hello", DESCENDING)], DESCENDING)
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self.assertRaises(TypeError, db.test.find().sort, "hello", "world")
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db.test.remove({})
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unsort = range(10)
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random.shuffle(unsort)
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for i in unsort:
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db.test.save({"x": i})
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asc = [i["x"] for i in db.test.find().sort("x", ASCENDING)]
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self.assertEqual(asc, range(10))
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asc = [i["x"] for i in db.test.find().sort([("x", ASCENDING)])]
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self.assertEqual(asc, range(10))
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expect = range(10)
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expect.reverse()
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desc = [i["x"] for i in db.test.find().sort("x", DESCENDING)]
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self.assertEqual(desc, expect)
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desc = [i["x"] for i in db.test.find().sort([("x", DESCENDING)])]
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self.assertEqual(desc, expect)
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desc = [i["x"] for i in db.test.find().sort("x", ASCENDING).sort("x", DESCENDING)]
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self.assertEqual(desc, expect)
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expected = [(1, 5), (2, 5), (0, 3), (7, 3), (9, 2), (2, 1), (3, 1)]
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shuffled = list(expected)
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random.shuffle(shuffled)
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db.test.remove({})
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for (a, b) in shuffled:
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db.test.save({"a": a, "b": b})
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result = [(i["a"], i["b"]) for i in db.test.find().sort([("b", DESCENDING),
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("a", ASCENDING)])]
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self.assertEqual(result, expected)
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a = db.test.find()
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a.sort("x", ASCENDING)
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for _ in a:
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break
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self.assertRaises(InvalidOperation, a.sort, "x", ASCENDING)
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def test_count(self):
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db = self.db
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db.test.remove({})
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self.assertEqual(0, db.test.find().count())
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for i in range(10):
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db.test.save({"x": i})
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self.assertEqual(10, db.test.find().count())
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self.assertTrue(isinstance(db.test.find().count(), types.IntType))
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self.assertEqual(10, db.test.find().limit(5).count())
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self.assertEqual(10, db.test.find().skip(5).count())
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self.assertEqual(1, db.test.find({"x": 1}).count())
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self.assertEqual(5, db.test.find({"x": {"$lt": 5}}).count())
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a = db.test.find()
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b = a.count()
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for _ in a:
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break
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self.assertRaises(InvalidOperation, a.count)
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self.assertEqual(0, db.test.acollectionthatdoesntexist.find().count())
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if __name__ == "__main__":
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unittest.main()
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