feat: add app handler method, get_appdir()

tests/test_app.py

@@ -15,11 +15,13 @@ from wuttjamaican import app
 from wuttjamaican.progress import ProgressBase
 from wuttjamaican.conf import WuttaConfig
 from wuttjamaican.util import UNSPECIFIED
+from wuttjamaican.testing import FileConfigTestCase
 
 
-class TestAppHandler(TestCase):
+class TestAppHandler(FileConfigTestCase):
 
     def setUp(self):
+        self.setup_files()
         self.config = WuttaConfig(appname='wuttatest')
         self.app = app.AppHandler(self.config)
         self.config.app = self.app
@@ -39,6 +41,40 @@ class TestAppHandler(TestCase):
         obj = self.app.load_object('wuttjamaican.util:UNSPECIFIED')
         self.assertIs(obj, UNSPECIFIED)
 
+    def test_get_appdir(self):
+
+        mockdir = self.mkdir('mockdir')
+
+        # default appdir
+        with patch.object(sys, 'prefix', new=mockdir):
+
+            # default is returned by default
+            appdir = self.app.get_appdir()
+            self.assertEqual(appdir, os.path.join(mockdir, 'app'))
+
+            # but not if caller wants config only
+            appdir = self.app.get_appdir(configured_only=True)
+            self.assertIsNone(appdir)
+
+            # also, cannot create if appdir path not known
+            self.assertRaises(ValueError, self.app.get_appdir, configured_only=True, create=True)
+
+        # configured appdir
+        self.config.setdefault('wuttatest.appdir', mockdir)
+        appdir = self.app.get_appdir()
+        self.assertEqual(appdir, mockdir)
+
+        # appdir w/ subpath
+        appdir = self.app.get_appdir('foo', 'bar')
+        self.assertEqual(appdir, os.path.join(mockdir, 'foo', 'bar'))
+
+        # subpath is created
+        self.assertEqual(len(os.listdir(mockdir)), 0)
+        appdir = self.app.get_appdir('foo', 'bar', create=True)
+        self.assertEqual(appdir, os.path.join(mockdir, 'foo', 'bar'))
+        self.assertEqual(os.listdir(mockdir), ['foo'])
+        self.assertEqual(os.listdir(os.path.join(mockdir, 'foo')), ['bar'])
+
     def test_make_appdir(self):
 
         # appdir is created, and 3 subfolders added by default