Merge branch 'jc/work-harder-to-prune-whitespace'

* jc/work-harder-to-prune-whitespace:
  test: fix inconsistent leading whitespace
  test: improve teardown cleanup
  api_config: raise errors for mis-configured environment variable
  api_config: avoid whitespace issues in config

nasdaqdatalink/api_config.py

@@ -60,6 +60,15 @@ def raise_empty_file(config_filename):
     raise ValueError("File '{:s}' is empty.".format(config_filename))
 
 
+def raise_empty_environment_variable():
+    raise ValueError("NASDAQ_DATA_LINK_API_KEY cannot be empty")
+
+
+def get_first_non_empty(file_handle):
+    lines = [line.strip() for line in file_handle.readlines()]
+    return next((line for line in lines if line), None)
+
+
 def read_key_from_file(filename=None):
     if filename is None:
         filename = default_config_filename()
@@ -68,7 +77,7 @@ def read_key_from_file(filename=None):
         raise_empty_file(filename)
 
     with open(filename, 'r') as f:
-        apikey = f.read()
+        apikey = get_first_non_empty(f)
 
     if not apikey:
         raise_empty_file(filename)
@@ -81,7 +90,11 @@ def api_key_environment_variable_exists():
 
 
 def read_key_from_environment_variable():
-    ApiConfig.api_key = os.environ.get(NASDAQ_DATA_LINK_API_KEY)
+    apikey = os.environ.get(NASDAQ_DATA_LINK_API_KEY)
+    if not apikey:
+        raise_empty_environment_variable()
+
+    ApiConfig.api_key = apikey
 
 
 def read_key(filename=None):

test/test_api_config.py

@@ -4,14 +4,20 @@
 from unittest import TestCase, mock
 from nasdaqdatalink.api_config import *
 
+TEST_BASE_PATH = os.path.join(
+  os.path.dirname(os.path.realpath(__file__)), ".nasdaq-config"
+)
+
 TEST_KEY_FILE = os.path.join(
-  os.path.dirname(os.path.realpath(__file__)), ".nasdaq-config", "testkeyfile"
+  TEST_BASE_PATH, "testkeyfile"
 )
 
 TEST_DEFAULT_FILE = os.path.join(
-  os.path.dirname(os.path.realpath(__file__)), ".nasdaq-config", "defaultkeyfile"
+  TEST_BASE_PATH, "defaultkeyfile"
 )
 
+TEST_DEFAULT_FILE_CONTENTS = 'keyfordefaultfile'
+
 
 class ApiConfigTest(TestCase):
     def setUp(self):
@@ -32,6 +38,8 @@ def tearDown(self):
         if os.path.exists(TEST_DEFAULT_FILE):
             os.remove(TEST_DEFAULT_FILE)
 
+        os.removedirs(TEST_BASE_PATH)
+
 
     def test_read_key_when_environment_variable_set(self):
         os.environ['NASDAQ_DATA_LINK_API_KEY'] = 'setinenv'
@@ -55,11 +63,25 @@ def test_read_key_when_environment_variable_not_set(self):
         self.assertEqual(ApiConfig.api_key, 'keyforfile')
 
 
+    def test_read_key_empty_file(self):
+        with mock.patch("nasdaqdatalink.api_config.default_config_filename") as mock_default_config_filename:
+            mock_default_config_filename.return_value = TEST_DEFAULT_FILE
+            save_key("")
+            with self.assertRaises(ValueError):
+                read_key()
+
+
+    def test_read_key_when_env_key_empty(self):
+        os.environ['NASDAQ_DATA_LINK_API_KEY'] = ''
+        with self.assertRaises(ValueError):
+            read_key()
+
+
     def test_read_key_when_files_not_set(self):
         ApiConfig.api_key = None
         with mock.patch("nasdaqdatalink.api_config.default_config_filename") as mock_default_config_filename:
-             mock_default_config_filename.return_value = TEST_DEFAULT_FILE
-             read_key()
+            mock_default_config_filename.return_value = TEST_DEFAULT_FILE
+            read_key()
 
         mock_default_config_filename.assert_called_once
         self.assertEqual(ApiConfig.api_key, None)
@@ -70,7 +92,43 @@ def test_read_key_when_default_file_set(self):
         ApiConfig.api_key = None # Set None, we are not testing save_key
 
         with mock.patch("nasdaqdatalink.api_config.default_config_filename") as mock_default_config_filename:
-             mock_default_config_filename.return_value = TEST_DEFAULT_FILE
-             read_key()
+            mock_default_config_filename.return_value = TEST_DEFAULT_FILE
+            read_key()
 
         self.assertEqual(ApiConfig.api_key, 'keyfordefaultfile')
+
+
+    def _read_key_from_file_helper(self, given, expected):
+        save_key(given, TEST_DEFAULT_FILE)
+        ApiConfig.api_key = None # Set None, we are not testing save_key
+
+        with mock.patch("nasdaqdatalink.api_config.default_config_filename") as mock_default_config_filename:
+            mock_default_config_filename.return_value = TEST_DEFAULT_FILE
+            read_key()
+
+        self.assertEqual(ApiConfig.api_key, expected)
+
+
+    def test_read_key_from_file_with_newline(self):
+        given = f"{TEST_DEFAULT_FILE_CONTENTS}\n"
+        self._read_key_from_file_helper(given, TEST_DEFAULT_FILE_CONTENTS)
+
+
+    def test_read_key_from_file_with_leading_newline(self):
+        given = f"\n{TEST_DEFAULT_FILE_CONTENTS}\n"
+        self._read_key_from_file_helper(given, TEST_DEFAULT_FILE_CONTENTS)
+
+
+    def test_read_key_from_file_with_space(self):
+        given = f" {TEST_DEFAULT_FILE_CONTENTS} "
+        self._read_key_from_file_helper(given, TEST_DEFAULT_FILE_CONTENTS)
+
+
+    def test_read_key_from_file_with_tab(self):
+        given = f"\t{TEST_DEFAULT_FILE_CONTENTS}\t"
+        self._read_key_from_file_helper(given, TEST_DEFAULT_FILE_CONTENTS)
+
+
+    def test_read_key_from_file_with_multi_newline(self):
+        given = "keyfordefaultfile\n\nanotherkey\n"
+        self._read_key_from_file_helper(given, TEST_DEFAULT_FILE_CONTENTS)