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import pytest
from rpython.rlib import rvmprof
from rpython.rlib.rvmprof.test.support import FakeVMProf, fakevmprof
class TestFakeVMProf(object):
def test_sampling(self):
fake = FakeVMProf()
assert not fake.is_sampling_enabled
#
fake.start_sampling()
assert fake.is_sampling_enabled
#
fake.stop_sampling()
fake.stop_sampling()
assert not fake.is_sampling_enabled
#
fake.start_sampling()
assert not fake.is_sampling_enabled
fake.start_sampling()
assert fake.is_sampling_enabled
#
pytest.raises(AssertionError, "fake.start_sampling()")
def test_check_status(self):
fake = FakeVMProf()
fake.stop_sampling()
pytest.raises(ValueError, "fake.check_status()")
class TestFixture(object):
def test_fixture(self, fakevmprof):
assert isinstance(fakevmprof, FakeVMProf)
assert rvmprof._get_vmprof() is fakevmprof
#
# tweak sampling using the "real" API, and check that we actually used
# the fake
rvmprof.start_sampling()
assert fakevmprof.is_sampling_enabled
rvmprof.stop_sampling()
assert not fakevmprof.is_sampling_enabled
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