From a017add8668e8513d9c0b30c958f2f7a35c6ae13 Mon Sep 17 00:00:00 2001
From: chfw <wangc_2011@hotmail.com>
Date: Mon, 28 Nov 2016 18:01:53 +0000
Subject: [PATCH] https://github.com/pyexcel/pyexcel-xls/issues/11, ignore
 cases in file extension

---
 pyexcel_io/manager.py | 14 +++++++++-----
 tests/test_io.py      | 21 +++++++++++++++++++++
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/pyexcel_io/manager.py b/pyexcel_io/manager.py
index 8e13ab2..69890e5 100644
--- a/pyexcel_io/manager.py
+++ b/pyexcel_io/manager.py
@@ -65,9 +65,11 @@ def get_io(file_type):
     :param file_type: a supported file type
     :returns: a appropriate io stream, None otherwise
     """
-    if file_type in text_stream_types:
+    __file_type = file_type.lower()
+
+    if __file_type in text_stream_types:
         return StringIO()
-    elif file_type in binary_stream_types:
+    elif __file_type in binary_stream_types:
         return BytesIO()
     else:
         return None
@@ -79,9 +81,11 @@ def get_io_type(file_type):
     :param file_type: a supported file type
     :returns: a appropriate io stream, None otherwise
     """
-    if file_type in text_stream_types:
+    __file_type = file_type.lower()
+    
+    if __file_type in text_stream_types:
         return "string"
-    elif file_type in binary_stream_types:
+    elif __file_type in binary_stream_types:
         return "bytes"
     else:
         return None
@@ -121,7 +125,7 @@ def create_writer(file_type, library=None):
 
 def _get_a_handler(factories, file_type, library):
     if file_type in factories:
-        handler_dict = factories[file_type]
+        handler_dict = factories[file_type.lower()]
         if library is not None:
             handler_class = handler_dict.get(library, None)
             if handler_class is None:
diff --git a/tests/test_io.py b/tests/test_io.py
index 6e9a1fd..85def44 100644
--- a/tests/test_io.py
+++ b/tests/test_io.py
@@ -135,6 +135,17 @@ def test_default_csv_format():
     assert result['csv'] == [[1, 2, 3]]
 
 
+def test_case_insentivity():
+    data = [['1', '2', '3']]
+    io = manager.get_io("CSV")
+    # test default format for saving is 'csv'
+    save_data(io, data)
+    io.seek(0)
+    # test default format for reading is 'csv'
+    result = get_data(io)
+    assert result['csv'] == [[1, 2, 3]]
+
+
 def test_file_handle_as_input():
     test_file = "file_handle.csv"
     with open(test_file, 'w') as f:
@@ -145,6 +156,16 @@ def test_file_handle_as_input():
         eq_(data['csv'], [[1, 2, 3]])
 
 
+def test_file_type_case_insensitivity():
+    test_file = "file_handle.CSv"
+    with open(test_file, 'w') as f:
+        f.write("1,2,3")
+
+    with open(test_file, 'r') as f:
+        data = get_data(f, 'csv')
+        eq_(data['csv'], [[1, 2, 3]])
+
+
 def test_file_handle_as_output():
     test_file = "file_handle.csv"
     with open(test_file, 'w') as f: