Parse dir (#63)

* update parse_directory

updated parse_directory so that capitalization in the file extension does not matter.

* Update test_parser.py

added test to ensure that the alias dictionary has keys when parsing a directory

alaska/keyword_tree.py

@@ -266,7 +266,7 @@ def parse_directory(self, directory):
         comprehensive_dict = {}
         comprehensive_not_found = []
         for filename in os.listdir(directory):
-            if filename.endswith(".las"):
+            if filename.endswith((".LAS",".las")):
                 path = os.path.join(directory, filename)
                 las = lasio.read(path)
                 mnem, desc = [], []

alaska/tests/test_parser.py

@@ -199,6 +199,15 @@ def test_parse_directory_2():
     assert "empty" in not_aliased
 
 
+def test_parse_directory_3():
+    """
+    Test that Aliaser can parse .LAS and .las
+    """
+    aliaser = Alias()
+    aliased, _ = aliaser.parse_directory(test_dir_1)
+    assert len(aliased.keys()) > 0
+
+
 def test_dictionary_parse_1():
     """
     Test that dictionary parser in Aliaser parses and returns correct labels