"""Tests directories set in the permamodel package definition file."""

import os

from .. import data_directory, examples_directory, permamodel_directory, tests_directory


def test_permamodel_directory_is_set():
    assert permamodel_directory is not None


def test_data_directory_is_set():
    assert data_directory is not None


def test_examples_directory_is_set():
    assert examples_directory is not None


def test_tests_directory_is_set():
    assert tests_directory is not None


def test_permamodel_directory_exists():
    assert os.path.isdir(permamodel_directory)


def test_data_directory_exists():
    assert os.path.isdir(data_directory)


def test_examples_directory_exists():
    assert os.path.isdir(examples_directory)


def test_tests_directory_exists():
    assert os.path.isdir(tests_directory)

"""Tests directories set in the permamodel package definition file."""

import os
from nose.tools import assert_true
from .. import (permamodel_directory, data_directory,
                examples_directory, tests_directory)


def test_permamodel_directory_is_set():
    assert(permamodel_directory is not None)


def test_data_directory_is_set():
    assert(data_directory is not None)


def test_examples_directory_is_set():
    assert(examples_directory is not None)


def test_tests_directory_is_set():
    assert(tests_directory is not None)


def test_permamodel_directory_exists():
    assert_true(os.path.isdir(permamodel_directory))


def test_data_directory_exists():
    assert_true(os.path.isdir(data_directory))


def test_examples_directory_exists():
    assert_true(os.path.isdir(examples_directory))


def test_tests_directory_exists():
    assert_true(os.path.isdir(tests_directory))

--- 
+++ 
@@ -1,38 +1,37 @@
 """Tests directories set in the permamodel package definition file."""
 
 import os
-from nose.tools import assert_true
-from .. import (permamodel_directory, data_directory,
-                examples_directory, tests_directory)
+
+from .. import data_directory, examples_directory, permamodel_directory, tests_directory
 
 
 def test_permamodel_directory_is_set():
-    assert(permamodel_directory is not None)
+    assert permamodel_directory is not None
 
 
 def test_data_directory_is_set():
-    assert(data_directory is not None)
+    assert data_directory is not None
 
 
 def test_examples_directory_is_set():
-    assert(examples_directory is not None)
+    assert examples_directory is not None
 
 
 def test_tests_directory_is_set():
-    assert(tests_directory is not None)
+    assert tests_directory is not None
 
 
 def test_permamodel_directory_exists():
-    assert_true(os.path.isdir(permamodel_directory))
+    assert os.path.isdir(permamodel_directory)
 
 
 def test_data_directory_exists():
-    assert_true(os.path.isdir(data_directory))
+    assert os.path.isdir(data_directory)
 
 
 def test_examples_directory_exists():
-    assert_true(os.path.isdir(examples_directory))
+    assert os.path.isdir(examples_directory)
 
 
 def test_tests_directory_exists():
-    assert_true(os.path.isdir(tests_directory))
+    assert os.path.isdir(tests_directory)
Remove assert_ functions from nose.
