# coding: utf-8

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from tests.selftest import *
from ptl.utils.pbs_dshutils import PbsConfigError


class TestDshUtils(TestSelf):
    """
    Test pbs distributed utilities util pbs_dshutils.py
    """

    def test_pbs_conf(self):
        """
        Test setting a pbs.conf variable and then unsetting it
        """
        var = 'PBS_COMM_THREADS'
        val = '16'
        self.du.set_pbs_config(confs={var: val})
        conf = self.du.parse_pbs_config()
        msg = 'pbs.conf variable not set'
        self.assertIn(var, conf, msg)
        self.assertEquals(conf[var], val, msg)

        msg = 'pbs.conf variable not unset'
        self.du.unset_pbs_config(confs=[var])
        conf = self.du.parse_pbs_config()
        self.assertNotIn(var, conf, msg)

        exception_found = False
        try:
            self.du.set_pbs_config(confs={'f': 'b'}, fout='/does/not/exist')
        except PbsConfigError:
            exception_found = True

        self.assertTrue(exception_found, 'PbsConfigError not thrown')

    def test_pbs_env(self):
        """
        Test setting a pbs_environment variable and then unsetting it
        """
        self.du.set_pbs_environment(environ={'pbs_foo': 'True'})
        environ = self.du.parse_pbs_environment()
        msg = 'pbs environment variable not set'
        self.assertIn('pbs_foo', environ, msg)
        self.assertEquals(environ['pbs_foo'], 'True', msg)

        msg = 'pbs environment variable not unset'
        self.du.unset_pbs_environment(environ=['pbs_foo'])
        environ = self.du.parse_pbs_environment()
        self.assertNotIn('pbs_foo', environ, msg)