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import sys
import time
import unittest
from pympler.classtracker import ClassTracker
import pympler.process
class Empty:
pass
class Foo:
def __init__(self):
self.foo = 'foo'
class Bar(Foo):
def __init__(self):
Foo.__init__(self)
self.bar = 'bar'
class FooNew(object):
def __init__(self):
self.foo = 'foo'
class BarNew(FooNew):
def __init__(self):
super(BarNew, self).__init__()
class TrackObjectTestCase(unittest.TestCase):
def setUp(self):
self.tracker = ClassTracker()
def tearDown(self):
self.tracker.detach_all()
def test_track_object(self):
"""Test object registration.
"""
foo = Foo()
bar = Bar()
self.tracker.track_object(foo)
self.tracker.track_object(bar)
self.assertTrue(id(foo) in self.tracker.objects)
self.assertTrue(id(bar) in self.tracker.objects)
self.assertTrue('Foo' in self.tracker.index)
self.assertTrue('Bar' in self.tracker.index)
self.assertEqual(self.tracker.objects[id(foo)].ref(),foo)
self.assertEqual(self.tracker.objects[id(bar)].ref(),bar)
def test_type_errors(self):
"""Test intrackable objects.
"""
i = 42
j = 'Foobar'
k = [i,j]
l = {i: j}
self.assertRaises(TypeError, self.tracker.track_object, i)
self.assertRaises(TypeError, self.tracker.track_object, j)
self.assertRaises(TypeError, self.tracker.track_object, k)
self.assertRaises(TypeError, self.tracker.track_object, l)
self.assertTrue(id(i) not in self.tracker.objects)
self.assertTrue(id(j) not in self.tracker.objects)
self.assertTrue(id(k) not in self.tracker.objects)
self.assertTrue(id(l) not in self.tracker.objects)
def test_track_by_name(self):
"""Test registering objects by name.
"""
foo = Foo()
self.tracker.track_object(foo, name='Foobar')
self.assertTrue('Foobar' in self.tracker.index )
self.assertEqual(self.tracker.index['Foobar'][0].ref(),foo)
def test_keep(self):
"""Test lifetime of tracked objects.
"""
foo = Foo()
bar = Bar()
self.tracker.track_object(foo, keep=1)
self.tracker.track_object(bar)
idfoo = id(foo)
idbar = id(bar)
del foo
del bar
self.assertTrue(self.tracker.objects[idfoo].ref() is not None)
self.assertTrue(self.tracker.objects[idbar].ref() is None)
def test_mixed_tracking(self):
"""Test mixed instance and class tracking.
"""
foo = Foo()
self.tracker.track_object(foo)
self.tracker.create_snapshot()
self.tracker.track_class(Foo)
objs = []
for _ in range(10):
objs.append(Foo())
self.tracker.create_snapshot()
def test_recurse(self):
"""Test recursive sizing and saving of referents.
"""
foo = Foo()
self.tracker.track_object(foo, resolution_level=1)
self.tracker.create_snapshot()
fp = self.tracker.objects[id(foo)].snapshots[-1]
refs = fp[1].refs
dref = [r for r in refs if r.name == '__dict__']
self.assertEqual(len(dref),1)
dref = dref[0]
self.assertTrue(dref.size > 0, dref.size)
self.assertTrue(dref.flat > 0, dref.flat)
self.assertEqual(dref.refs,())
# Test track_change and more fine-grained resolution
self.tracker.track_change(foo, resolution_level=2)
self.tracker.create_snapshot()
fp = self.tracker.objects[id(foo)].snapshots[-1]
refs = fp[1].refs
dref = [r for r in refs if r.name == '__dict__']
self.assertEqual(len(dref),1)
dref = dref[0]
namerefs = [r.name for r in dref.refs]
self.assertTrue('[K] foo' in namerefs, namerefs)
self.assertTrue("[V] foo: 'foo'" in namerefs, namerefs)
class SnapshotTestCase(unittest.TestCase):
def setUp(self):
self.tracker = ClassTracker()
def tearDown(self):
self.tracker.stop_periodic_snapshots()
self.tracker.clear()
def test_timestamp(self):
"""Test timestamp of snapshots.
"""
foo = Foo()
bar = Bar()
self.tracker.track_object(foo)
self.tracker.track_object(bar)
self.tracker.create_snapshot()
self.tracker.create_snapshot()
self.tracker.create_snapshot()
refts = [fp.timestamp for fp in self.tracker.snapshots]
for to in self.tracker.objects.values():
ts = [t for (t,sz) in to.snapshots[1:]]
self.assertEqual(ts,refts)
def test_snapshot_members(self):
"""Test existence and value of snapshot members.
"""
foo = Foo()
self.tracker.track_object(foo)
self.tracker.create_snapshot()
self.tracker.create_snapshot(compute_total=True)
fp = self.tracker.snapshots[0]
fp_with_total = self.tracker.snapshots[1]
self.assertTrue(fp.overhead > 0, fp.overhead)
self.assertTrue(fp.tracked_total > 0, fp.tracked_total)
self.assertEqual(fp.asizeof_total, 0)
self.assertTrue(fp_with_total.asizeof_total > 0, fp_with_total.asizeof_total)
self.assertTrue(fp_with_total.asizeof_total >= fp_with_total.tracked_total)
if pympler.process.is_available():
procmem = fp.system_total
self.assertEqual(fp.total, procmem.vsz)
self.assertTrue(procmem.vsz > 0, procmem)
self.assertTrue(procmem.rss > 0, procmem)
self.assertTrue(procmem.vsz >= procmem.rss, procmem)
self.assertTrue(procmem.vsz > fp.overhead, procmem)
self.assertTrue(procmem.vsz > fp.tracked_total, procmem)
self.assertTrue(fp_with_total.system_total.vsz > fp_with_total.asizeof_total)
else:
self.assertEqual(fp_with_total.total, fp_with_total.asizeof_total)
self.assertEqual(fp.total, fp.tracked_total)
def test_desc(self):
"""Test snapshot label.
"""
self.tracker.create_snapshot()
self.tracker.create_snapshot('alpha')
self.tracker.create_snapshot(description='beta')
self.tracker.create_snapshot(42)
self.assertEqual(len(self.tracker.snapshots), 4)
self.assertEqual(self.tracker.snapshots[0].desc, '')
self.assertEqual(self.tracker.snapshots[1].desc, 'alpha')
self.assertEqual(self.tracker.snapshots[2].desc, 'beta')
self.assertEqual(self.tracker.snapshots[3].desc, '42')
snapshot = self.tracker.snapshots[0]
self.assertEqual(snapshot.label, '%.3fs' % snapshot.timestamp)
snapshot = self.tracker.snapshots[1]
self.assertEqual(snapshot.label, 'alpha (%.3fs)' % snapshot.timestamp)
snapshot = self.tracker.snapshots[3]
self.assertEqual(snapshot.label, '42 (%.3fs)' % snapshot.timestamp)
def test_background_monitoring(self):
"""Test background monitoring.
"""
self.tracker.start_periodic_snapshots(0.1)
self.assertEqual(self.tracker._periodic_thread.interval, 0.1)
self.assertEqual(self.tracker._periodic_thread.getName(), 'BackgroundMonitor')
for x in range(10): # try to interfere
self.tracker.create_snapshot(str(x))
time.sleep(0.5)
self.tracker.start_periodic_snapshots(0.2)
self.assertEqual(self.tracker._periodic_thread.interval, 0.2)
self.tracker.stop_periodic_snapshots()
self.assertTrue(self.tracker._periodic_thread is None)
self.assertTrue(len(self.tracker.snapshots) > 10)
class TrackClassTestCase(unittest.TestCase):
def setUp(self):
self.tracker = ClassTracker()
def tearDown(self):
self.tracker.stop_periodic_snapshots()
self.tracker.clear()
def test_type_errors(self):
"""Test invalid parameters for class tracking.
"""
i = 42
j = 'Foobar'
k = [i,j]
l = {i: j}
foo = Foo()
bar = Bar()
self.assertRaises(TypeError, self.tracker.track_class, i)
self.assertRaises(TypeError, self.tracker.track_class, j)
self.assertRaises(TypeError, self.tracker.track_class, k)
self.assertRaises(TypeError, self.tracker.track_class, l)
self.assertRaises(TypeError, self.tracker.track_class, foo)
self.assertRaises(TypeError, self.tracker.track_class, bar)
self.assertTrue(id(i) not in self.tracker.objects)
self.assertTrue(id(j) not in self.tracker.objects)
self.assertTrue(id(k) not in self.tracker.objects)
self.assertTrue(id(l) not in self.tracker.objects)
def test_track_class(self):
"""Test tracking objects through classes.
"""
self.tracker.track_class(Foo)
self.tracker.track_class(Bar)
self.tracker.track_class(Empty)
self.tracker.track_class(Foo)
foo = Foo()
bar = Bar()
empty = Empty()
self.assertTrue(id(foo) in self.tracker.objects)
self.assertTrue(id(bar) in self.tracker.objects)
self.assertTrue(id(empty) in self.tracker.objects)
def test_track_class_new(self):
"""Test tracking new style classes.
"""
self.tracker.track_class(FooNew)
self.tracker.track_class(BarNew)
foo = FooNew()
bar = BarNew()
self.assertTrue(id(foo) in self.tracker.objects)
self.assertTrue(id(bar) in self.tracker.objects)
def test_track_by_name(self):
"""Test registering objects by name.
"""
self.tracker.track_class(Foo, name='Foobar')
foo = Foo()
self.assertTrue('Foobar' in self.tracker.index )
self.assertEqual(self.tracker.index['Foobar'][0].ref(),foo)
def test_keep(self):
"""Test lifetime of tracked objects.
"""
self.tracker.track_class(Foo, keep=1)
self.tracker.track_class(Bar)
foo = Foo()
bar = Bar()
idfoo = id(foo)
idbar = id(bar)
del foo
del bar
self.assertTrue(self.tracker.objects[idfoo].ref() is not None)
self.assertTrue(self.tracker.objects[idbar].ref() is None)
def test_class_history(self):
"""Test instance history of tracked class.
"""
self.tracker.track_class(Foo, name='Foo')
f1 = Foo()
f2 = Foo()
f3 = Foo()
del f1
del f2
f4 = Foo()
del f3
del f4
instances = [cnt for _, cnt in self.tracker.history['Foo']]
self.assertEqual(instances, [1, 2, 3, 2, 1, 2, 1, 0])
def test_trace(self):
"""Test instantiation tracing of tracked objects.
"""
from inspect import stack
self.tracker.track_class(Foo, trace=True)
self.tracker.track_class(BarNew, trace=True)
foo = Foo()
bar = BarNew()
idfoo = id(foo)
idbar = id(bar)
trace = []
st = stack()
try:
for fr in st:
trace.insert(0, fr[1:])
finally:
del st
self.assertEqual(self.tracker.objects[idfoo].trace[-1][3][0].strip(),"foo = Foo()")
self.assertEqual(self.tracker.objects[idfoo].trace[:-1],trace[:-1], trace)
self.assertEqual(self.tracker.objects[idbar].trace[:-1],trace[:-1], trace)
def test_detach(self):
"""Test detaching from tracked classes.
"""
self.tracker.track_class(Foo)
self.tracker.track_class(Bar)
foo = Foo()
bar = Bar()
self.assertTrue(id(foo) in self.tracker.objects)
self.assertTrue(id(bar) in self.tracker.objects)
self.tracker.detach_class(Foo)
self.tracker.detach_class(Bar)
foo2 = Foo()
bar2 = Bar()
self.assertTrue(id(foo2) not in self.tracker.objects)
self.assertTrue(id(bar2) not in self.tracker.objects)
self.assertRaises(KeyError, self.tracker.detach_class, Foo)
def test_change_name(self):
"""Test modifying name.
"""
self.tracker.track_class(Foo, name='Foobar')
self.tracker.track_class(Foo, name='Baz')
foo = Foo()
self.assertTrue('Foobar' not in self.tracker.index)
self.assertTrue('Baz' in self.tracker.index)
self.assertEqual(self.tracker.index['Baz'][0].ref(),foo)
class TrackerTestCase(unittest.TestCase):
def test_detach_on_close(self):
original_constructor = Foo.__init__
tracker = ClassTracker()
tracker.track_class(Foo)
tracker.close()
self.assertEqual(Foo.__init__, original_constructor)
if __name__ == "__main__":
suite = unittest.TestSuite()
tclasses = [TrackObjectTestCase,
TrackClassTestCase,
SnapshotTestCase,
TrackerTestCase
]
for tclass in tclasses:
names = unittest.getTestCaseNames(tclass, 'test_')
suite.addTests(map(tclass, names))
if not unittest.TextTestRunner().run(suite).wasSuccessful():
sys.exit(1)
|
