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# encoding: utf-8
"""
Unit tests for locator.py.
"""
from datetime import datetime
import os
import sys
import unittest
# TODO: remove this alias.
from pystache.common import TemplateNotFoundError
from pystache.loader import Loader as Reader
from pystache.locator import Locator
from pystache.tests.common import DATA_DIR, EXAMPLES_DIR, AssertExceptionMixin
from pystache.tests.data.views import SayHello
LOCATOR_DATA_DIR = os.path.join(DATA_DIR, 'locator')
class LocatorTests(unittest.TestCase, AssertExceptionMixin):
def _locator(self):
return Locator(search_dirs=DATA_DIR)
def test_init__extension(self):
# Test the default value.
locator = Locator()
self.assertEqual(locator.template_extension, 'mustache')
locator = Locator(extension='txt')
self.assertEqual(locator.template_extension, 'txt')
locator = Locator(extension=False)
self.assertTrue(locator.template_extension is False)
def _assert_paths(self, actual, expected):
"""
Assert that two paths are the same.
"""
self.assertEqual(actual, expected)
def test_get_object_directory(self):
locator = Locator()
obj = SayHello()
actual = locator.get_object_directory(obj)
self._assert_paths(actual, DATA_DIR)
def test_get_object_directory__not_hasattr_module(self):
locator = Locator()
# Previously, we used a genuine object -- a datetime instance --
# because datetime instances did not have the __module__ attribute
# in CPython. See, for example--
#
# http://bugs.python.org/issue15223
#
# However, since datetime instances do have the __module__ attribute
# in PyPy, we needed to switch to something else once we added
# support for PyPi. This was so that our test runs would pass
# in all systems.
obj = "abc"
self.assertFalse(hasattr(obj, '__module__'))
self.assertEqual(locator.get_object_directory(obj), None)
self.assertFalse(hasattr(None, '__module__'))
self.assertEqual(locator.get_object_directory(None), None)
def test_make_file_name(self):
locator = Locator()
locator.template_extension = 'bar'
self.assertEqual(locator.make_file_name('foo'), 'foo.bar')
locator.template_extension = False
self.assertEqual(locator.make_file_name('foo'), 'foo')
locator.template_extension = ''
self.assertEqual(locator.make_file_name('foo'), 'foo.')
def test_make_file_name__template_extension_argument(self):
locator = Locator()
self.assertEqual(locator.make_file_name('foo', template_extension='bar'), 'foo.bar')
def test_find_file(self):
locator = Locator()
path = locator.find_file('template.txt', [LOCATOR_DATA_DIR])
expected_path = os.path.join(LOCATOR_DATA_DIR, 'template.txt')
self.assertEqual(path, expected_path)
def test_find_name(self):
locator = Locator()
path = locator.find_name(search_dirs=[EXAMPLES_DIR], template_name='simple')
self.assertEqual(os.path.basename(path), 'simple.mustache')
def test_find_name__using_list_of_paths(self):
locator = Locator()
path = locator.find_name(search_dirs=[EXAMPLES_DIR, 'doesnt_exist'], template_name='simple')
self.assertTrue(path)
def test_find_name__precedence(self):
"""
Test the order in which find_name() searches directories.
"""
locator = Locator()
dir1 = DATA_DIR
dir2 = LOCATOR_DATA_DIR
self.assertTrue(locator.find_name(search_dirs=[dir1], template_name='duplicate'))
self.assertTrue(locator.find_name(search_dirs=[dir2], template_name='duplicate'))
path = locator.find_name(search_dirs=[dir2, dir1], template_name='duplicate')
dirpath = os.path.dirname(path)
dirname = os.path.split(dirpath)[-1]
self.assertEqual(dirname, 'locator')
def test_find_name__non_existent_template_fails(self):
locator = Locator()
self.assertException(TemplateNotFoundError, "File 'doesnt_exist.mustache' not found in dirs: []",
locator.find_name, search_dirs=[], template_name='doesnt_exist')
def test_find_object(self):
locator = Locator()
obj = SayHello()
actual = locator.find_object(search_dirs=[], obj=obj, file_name='sample_view.mustache')
expected = os.path.join(DATA_DIR, 'sample_view.mustache')
self._assert_paths(actual, expected)
def test_find_object__none_file_name(self):
locator = Locator()
obj = SayHello()
actual = locator.find_object(search_dirs=[], obj=obj)
expected = os.path.join(DATA_DIR, 'say_hello.mustache')
self.assertEqual(actual, expected)
def test_find_object__none_object_directory(self):
locator = Locator()
obj = None
self.assertEqual(None, locator.get_object_directory(obj))
actual = locator.find_object(search_dirs=[DATA_DIR], obj=obj, file_name='say_hello.mustache')
expected = os.path.join(DATA_DIR, 'say_hello.mustache')
self.assertEqual(actual, expected)
def test_make_template_name(self):
"""
Test make_template_name().
"""
locator = Locator()
class FooBar(object):
pass
foo = FooBar()
self.assertEqual(locator.make_template_name(foo), 'foo_bar')
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