Fix NaT test data

Previously this was trying to introduce NaT values by trying to get a
negative zero. However this did not work correctly. So this recenters
the range around the equivalent of negative zero in double values for
integers. Have verified this will introduce a few NaT values.

Author: jakirkham

numcodecs/tests/test_blosc.py

@@ -47,10 +47,10 @@
     np.random.randint(0, 2**60, size=1000, dtype='u8').view('m8[ns]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('M8[m]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('m8[m]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('M8[ns]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('m8[ns]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('M8[m]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('m8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[m]'),
 ]
 
 

numcodecs/tests/test_bz2.py

@@ -34,10 +34,10 @@
     np.random.randint(0, 2**60, size=1000, dtype='u8').view('m8[ns]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('M8[m]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('m8[m]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('M8[ns]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('m8[ns]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('M8[m]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('m8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[m]'),
 ]
 
 

numcodecs/tests/test_gzip.py

@@ -36,10 +36,10 @@
     np.random.randint(0, 2**60, size=1000, dtype='u8').view('m8[ns]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('M8[m]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('m8[m]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('M8[ns]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('m8[ns]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('M8[m]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('m8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[m]'),
 ]
 
 

numcodecs/tests/test_lz4.py

@@ -37,10 +37,10 @@
     np.random.randint(0, 2**60, size=1000, dtype='u8').view('m8[ns]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('M8[m]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('m8[m]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('M8[ns]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('m8[ns]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('M8[m]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('m8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[m]'),
 ]
 
 

numcodecs/tests/test_lzma.py

@@ -42,10 +42,10 @@
     np.random.randint(0, 2**60, size=1000, dtype='u8').view('m8[ns]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('M8[m]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('m8[m]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('M8[ns]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('m8[ns]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('M8[m]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('m8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[m]'),
 ]
 
 

numcodecs/tests/test_zstd.py

@@ -37,10 +37,10 @@
     np.random.randint(0, 2**60, size=1000, dtype='u8').view('m8[ns]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('M8[m]'),
     np.random.randint(0, 2**25, size=1000, dtype='u8').view('m8[m]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('M8[ns]'),
-    (-np.random.randint(-2**30, 2**30, size=1000, dtype='i8')).view('m8[ns]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('M8[m]'),
-    (-np.random.randint(-2**12, 2**13, size=1000, dtype='i8')).view('m8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[ns]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('M8[m]'),
+    np.random.randint(-2**63, -2**63 + 20, size=1000, dtype='i8').view('m8[m]'),
 ]