Make case insensitive (#39)

* add test for case insensitivity
* fix up tree_allows_any_case test
* fix case sensitivity issues

ety/word.py

@@ -21,7 +21,8 @@ def __init__(self, word, language='eng', is_source=False):
             'direct': [],
             'recursive': []
         }
-        self._id = u"{}:{}".format(self.word, self.language.iso)
+        self._id = u"{}:{}".format(
+            self.word.lower(), self.language.iso.lower())
 
     def origins(self, recursive=False):
         search = 'recursive' if recursive else 'direct'
@@ -32,8 +33,10 @@ def origins(self, recursive=False):
             return o
 
         row = list(filter(
-            lambda entry: entry['a_word'] == self.word and entry[
-                'a_lang'] == self.language.iso, etymwn_data))
+            lambda entry: (
+                entry['a_word'].lower() == self.word.lower()
+                and entry['a_lang'].lower() == self.language.iso.lower()),
+            etymwn_data))
 
         o = [Word(item['b_word'], item['b_lang']) for item in row]
 

tests.py

@@ -98,6 +98,18 @@ def test_census_origins(self):
 
         self.assertEqual(d.origins(recursive=True), e + f)
 
+    def test_origins_allows_any_case(self):
+        wonky_word_origins = ety.origins("tEsT")
+        lower_word_origins = ety.origins("test")
+
+        self.assertEqual(wonky_word_origins, lower_word_origins)
+
+    def test_tree_allows_any_case(self):
+        wonky_word_tree = [node.data for node in ety.tree("tEsT").all_nodes()]
+        lower_word_tree = [node.data for node in ety.tree("test").all_nodes()]
+
+        self.assertEqual(wonky_word_tree, lower_word_tree)
+
     @stdout_capture
     def test_cli_no_args(self, output):
         words = ["test"]