added print support for PocType

glymur/lib/openjp2.py

@@ -138,6 +138,13 @@ class PocType(ctypes.Structure):
         ("tx0_t",      ctypes.c_uint32),
         ("ty0_t",      ctypes.c_uint32)]
 
+    def __str__(self):
+        msg = "{0}:\n".format(self.__class__)
+        for field_name, _ in self._fields_:
+            msg += "    {0}: {1}\n".format(
+                field_name, getattr(self, field_name))
+        return msg
+
 
 class DecompressionParametersType(ctypes.Structure):
     """Decompression parameters.

glymur/test/fixtures.py

@@ -919,3 +919,41 @@ decompression_parameters_type = """<class 'glymur.lib.openjp2.DecompressionParam
     jpwl_exp_comps: 0
     jpwl_max_tiles: 0
     flags: 0"""
+
+default_progression_order_changes_type = """<class 'glymur.lib.openjp2.PocType'>:
+    resno0: 0
+    compno0: 0
+    layno1: 0
+    resno1: 0
+    compno1: 0
+    layno0: 0
+    precno0: 0
+    precno1: 0
+    prg1: 0
+    prg: 0
+    progorder: b''
+    tile: 0
+    tx0: 0
+    tx1: 0
+    ty0: 0
+    ty1: 0
+    layS: 0
+    resS: 0
+    compS: 0
+    prcS: 0
+    layE: 0
+    resE: 0
+    compE: 0
+    prcE: 0
+    txS: 0
+    txE: 0
+    tyS: 0
+    tyE: 0
+    dx: 0
+    dy: 0
+    lay_t: 0
+    res_t: 0
+    comp_t: 0
+    prec_t: 0
+    tx0_t: 0
+    ty0_t: 0"""

glymur/test/test_printing.py

@@ -618,6 +618,7 @@ class TestPrinting(unittest.TestCase):
 
         self.assertEqual(actual, expected)
 
+@unittest.skipIf(sys.hexversion < 0x03000000, "do not care about 2.7 here")
 @unittest.skipIf(re.match('1|2.0', glymur.version.openjpeg_version),
                  "Requires openjpeg 2.1.0 or higher")
 class TestPrintingOpenjp2(unittest.TestCase):
@@ -637,6 +638,16 @@ class TestPrintingOpenjp2(unittest.TestCase):
         expected = fixtures.decompression_parameters_type
         self.assertEqual(actual, expected)
 
+    def test_progression_order_changes(self):
+        """printing PocType"""
+        ptype = glymur.lib.openjp2.PocType()
+        with patch('sys.stdout', new=StringIO()) as fake_out:
+            print(ptype)
+            actual = fake_out.getvalue().strip()
+        expected = fixtures.default_progression_order_changes_type
+        self.assertEqual(actual, expected)
+
+
 @unittest.skipIf(OPJ_DATA_ROOT is None,
                  "OPJ_DATA_ROOT environment variable not set")
 @unittest.skipIf(os.name == "nt", "Temporary file issue on window.")