Tests to error out with read_bands, write without libraries present.

glymur/jp2k.py

@@ -226,6 +226,9 @@ class Jp2k(Jp2kBox):
         >>> j = Jp2k(tfile.name, mode='wb')
         >>> j.write(data.astype(np.uint8))
         """
+        if _opj2.OPENJP2 is None:
+            raise IOError("You must have the development version of OpenJP2 "
+                          "installed before using this functionality.")
 
         cparams = _opj2.set_default_encoder_parameters()
 
@@ -965,8 +968,8 @@ class Jp2k(Jp2kBox):
             If the openjp2 library is not available.
         """
         if _opj2.OPENJP2 is None:
-            msg = "Requires openjp2 library."
+            raise IOError("You must have the development version of OpenJP2 "
-            raise NotImplementedError(msg)
+                          "installed before using this functionality.")
 
         lst = self._read_common(rlevel=rlevel,
                                 layer=layer,

glymur/test/test_config.py

@@ -25,23 +25,6 @@ import glymur
 from glymur import Jp2k
 from glymur.lib import openjp2 as opj2
 
-class TestConfig(unittest.TestCase):
-
-    def setUp(self):
-        self.jp2file = glymur.data.nemo()
-
-    def tearDown(self):
-        pass
-
-    def test_read_without_library_backing_us_up(self):
-        """Don't have either openjp2 or openjpeg libraries?  Must error out.
-        """
-        with patch('glymur.lib.openjp2.OPENJP2', new=None):
-            with  patch('glymur.lib.openjpeg.OPENJPEG', new=None):
-                with self.assertRaises((IOError, OSError)):
-                    d = glymur.Jp2k(self.jp2file).read()
-
-
 @unittest.skipIf(sys.hexversion < 0x03020000,
                  "TemporaryDirectory introduced in 3.2.")
 @unittest.skipIf(glymur.lib.openjp2.OPENJP2 is None,

glymur/test/test_jp2k.py

@@ -47,6 +47,44 @@ def load_tests(loader, tests, ignore):
     return tests
 
 
+class TestConfig(unittest.TestCase):
+
+    def setUp(self):
+        self.jp2file = glymur.data.nemo()
+        self.j2kfile = glymur.data.goodstuff()
+
+    def tearDown(self):
+        pass
+
+    def test_read_without_library_backing_us_up(self):
+        """Don't have either openjp2 or openjpeg libraries?  Must error out.
+        """
+        with patch('glymur.lib.openjp2.OPENJP2', new=None):
+            with  patch('glymur.lib.openjpeg.OPENJPEG', new=None):
+                with self.assertRaises((IOError, OSError)):
+                    d = glymur.Jp2k(self.jp2file).read()
+
+    def test_read_bands_without_library_backing_us_up(self):
+        """Don't have openjp2 library?  Must error out.
+        """
+        with patch('glymur.lib.openjp2.OPENJP2', new=None):
+            with  patch('glymur.lib.openjpeg.OPENJPEG', new=None):
+                with self.assertRaises((IOError, OSError)):
+                    d = glymur.Jp2k(self.jp2file).read_bands()
+
+    @unittest.skipIf(os.name == "nt", "NamedTemporaryFile issue on windows")
+    def test_write_without_library_backing_us_up(self):
+        """Don't have openjp2 library?  Must error out.
+        """
+        data = glymur.Jp2k(self.j2kfile).read()
+        with patch('glymur.lib.openjp2.OPENJP2', new=None):
+            with  patch('glymur.lib.openjpeg.OPENJPEG', new=None):
+                with self.assertRaises((IOError, OSError)):
+                    with tempfile.NamedTemporaryFile(suffix='.jp2') as tfile:
+                        ofile = Jp2k(tfile.name, 'wb')
+                        ofile.write(data)
+
+
 @unittest.skipIf(os.name == "nt", "NamedTemporaryFile issue on windows")
 @unittest.skipIf(glymur.lib.openjp2.OPENJP2 is None,
                  "Missing openjp2 library.")
@@ -713,13 +751,6 @@ class TestJp2k15(unittest.TestCase):
     def tearDown(self):
         pass
 
-    def test_bands(self):
-        """Reading individual bands is an advanced maneuver.
-        """
-        jp2k = Jp2k(self.j2kfile)
-        with self.assertRaises(NotImplementedError):
-            jp2k.read_bands()
-
     def test_area(self):
         """Area option not allowed for 1.5.1.
         """