[pypy-svn] r46943 - in pypy/dist/pypy/module/struct: . test

[arigo at codespeak.net]

Author: arigo
Date: Thu Sep 27 13:09:47 2007
New Revision: 46943

Added:
   pypy/dist/pypy/module/struct/ieee.py
      - copied, changed from r46897, pypy/dist/pypy/lib/struct.py
   pypy/dist/pypy/module/struct/test/test_ieee.py   (contents, props changed)
Log:
Copy this code from pypy/lib/struct and RPythonify it.


Added: pypy/dist/pypy/module/struct/test/test_ieee.py
==============================================================================
--- (empty file)
+++ pypy/dist/pypy/module/struct/test/test_ieee.py	Thu Sep 27 13:09:47 2007
@@ -0,0 +1,30 @@
+from pypy.module.struct.ieee import pack_float, unpack_float
+
+
+testcases = [
+    (-0.025, 4, False, '\xcd\xcc\xcc\xbc'),
+    (2.0 ** 100, 4, False, '\x00\x00\x80q'),
+    (0.0, 4, True, '\x00\x00\x00\x00'),
+    (-12345, 4, True, '\xc6@\xe4\x00'),
+    (-0.025, 8, False, '\x9a\x99\x99\x99\x99\x99\x99\xbf'),
+    (2.0 ** 100, 8, False, '\x00\x00\x00\x00\x00\x000F'),
+    (0.0, 8, True, '\x00\x00\x00\x00\x00\x00\x00\x00'),
+    (-123456789, 8, True, '\xc1\x9do4T\x00\x00\x00'),
+    ]
+
+
+def test_pack():
+    for number, size, bigendian, expected in testcases:
+        res = []
+        pack_float(res, number, size, bigendian)
+        assert res == list(expected)
+
+
+def test_unpack():
+    for expected, size, bigendian, input in testcases:
+        assert len(input) == size
+        res = unpack_float(input, bigendian)
+        if size == 8:
+            assert res == expected    # exact result expected
+        else:
+            assert abs(res - expected) < 1E-6