From 84e756ee8a9b7c83b921efd277ff624a0dd90bf6 Mon Sep 17 00:00:00 2001
From: Francesc Elies Henar <francesc.elies@gmail.com>
Date: Mon, 19 Jun 2017 23:08:56 +0200
Subject: [PATCH 1/2] adds test

Creates an array big enough where splitting is worthy, therefore the bit 4
`dont_split` is set to `False`
---
 test/test_headers.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/test_headers.py b/test/test_headers.py
index 9da98791..de614ac9 100644
--- a/test/test_headers.py
+++ b/test/test_headers.py
@@ -172,6 +172,25 @@ def test_decode_blosc_header_uncompressible_data():
     nt.assert_equal(expected, header)
 
 
+def test_decode_blosc_header_uncompressible_data_dont_split_false():
+    array_ = np.asarray(np.random.randn(256),
+                        dtype=np.float32).tostring()
+    blosc_args = BloscArgs()
+    blosc_args.shuffle = True
+    compressed = blosc.compress(array_, **blosc_args)
+    header = decode_blosc_header(compressed)
+    expected = {
+        'versionlz': 1,
+        'version': 2,
+        'blocksize': 1024,
+        'ctbytes': len(array_) + 16,  # original + 16 header bytes
+        'flags': 0x3,  # 1 for shuffle 2 for non-compressed
+        'nbytes': len(array_),
+        'typesize': blosc_args.typesize
+    }
+    nt.assert_equal(expected, header)
+
+
 def test_BloscPackHeader_constructor_exceptions():
     # uses nose test generators
 

From 090b1336c8ec1abe7e4099dafd54934cf1181ec1 Mon Sep 17 00:00:00 2001
From: Francesc Elies Henar <francesc.elies@gmail.com>
Date: Mon, 19 Jun 2017 23:10:36 +0200
Subject: [PATCH 2/2] sets array size to max size allowed for `dont_split` true

If a bigger array is created with this `typesize` the bit `dont_split` would be
set to false.
---
 test/test_headers.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/test_headers.py b/test/test_headers.py
index de614ac9..21c9d626 100644
--- a/test/test_headers.py
+++ b/test/test_headers.py
@@ -156,14 +156,14 @@ def test_decode_blosc_header_deactivate_shuffle():
 
 
 def test_decode_blosc_header_uncompressible_data():
-    array_ = np.asarray(np.random.randn(23),
+    array_ = np.asarray(np.random.randn(255),
                         dtype=np.float32).tostring()
     blosc_args = BloscArgs()
     blosc_args.shuffle = True
     compressed = blosc.compress(array_, **blosc_args)
     header = decode_blosc_header(compressed)
     expected = {'versionlz': 1,
-                'blocksize': 88,
+                'blocksize': 1016,
                 'ctbytes': len(array_) + 16,  # original + 16 header bytes
                 'version': 2,
                 'flags': 0x13,  # 1 for shuffle 2 for non-compressed 4 for small blocksize