test_linux.py 文件源码

def test_disk_io_counters_kernel_2_6_limited_mocked(self):
        # Tests /proc/diskstats parsing format for 2.6 kernels,
        # where one line of /proc/partitions return a limited
        # amount of metrics when it bumps into a partition
        # (instead of a disk). See:
        # https://github.com/giampaolo/psutil/issues/767
        def open_mock(name, *args, **kwargs):
            if name == '/proc/partitions':
                return io.StringIO(textwrap.dedent(u"""\
                    major minor  #blocks  name

                       8        0  488386584 hda
                    """))
            elif name == '/proc/diskstats':
                return io.StringIO(
                    u("   3    1   hda 1 2 3 4"))
            else:
                return orig_open(name, *args, **kwargs)

        orig_open = open
        patch_point = 'builtins.open' if PY3 else '__builtin__.open'
        with mock.patch(patch_point, side_effect=open_mock) as m:
            ret = psutil.disk_io_counters()
            assert m.called
            self.assertEqual(ret.read_count, 1)
            self.assertEqual(ret.read_bytes, 2 * SECTOR_SIZE)
            self.assertEqual(ret.write_count, 3)
            self.assertEqual(ret.write_bytes, 4 * SECTOR_SIZE)

            self.assertEqual(ret.read_merged_count, 0)
            self.assertEqual(ret.read_time, 0)
            self.assertEqual(ret.write_merged_count, 0)
            self.assertEqual(ret.write_time, 0)
            self.assertEqual(ret.busy_time, 0)


# =====================================================================
# misc
# =====================================================================