Simplify use of contexts in tests

Author: Adam Robbins-Pianka

qiita_ware/test/test_demux.py

@@ -246,11 +246,9 @@ def test_to_hdf5(self):
         with tempfile.NamedTemporaryFile('r+', suffix='.fna',
                                          delete=False) as f:
             f.write(seqdata)
-            f.flush()
-            f.close()
 
-            to_hdf5(f.name, self.hdf5_file)
-            self.to_remove.append(f.name)
+        self.to_remove.append(f.name)
+        to_hdf5(f.name, self.hdf5_file)
 
         npt.assert_equal(self.hdf5_file['a/sequence'][:], np.array(["x", "xy",
                                                                     "xyz"]))
@@ -283,14 +281,13 @@ def test_to_ascii(self):
         with tempfile.NamedTemporaryFile('r+', suffix='.fq',
                                          delete=False) as f:
             f.write(fqdata)
-            f.flush()
-            f.close()
-            to_hdf5(f.name, self.hdf5_file)
-            self.to_remove.append(f.name)
 
         exp = [(b"@a_0 orig_bc=abc new_bc=abc bc_diffs=0\nxyz\n+\nABC\n"),
                (b"@b_0 orig_bc=abw new_bc=wbc bc_diffs=4\nqwe\n+\nDFG\n"),
                (b"@b_1 orig_bc=abw new_bc=wbc bc_diffs=4\nqwe\n+\nDEF\n")]
+        self.to_remove.append(f.name)
+        to_hdf5(f.name, self.hdf5_file)
+
 
         obs = list(to_ascii(self.hdf5_file, samples=['a', 'b']))
         self.assertEqual(obs, exp)
@@ -299,10 +296,9 @@ def test_to_per_sample_ascii(self):
         with tempfile.NamedTemporaryFile('r+', suffix='.fq',
                                          delete=False) as f:
             f.write(fqdata)
-            f.flush()
-            f.close()
-            to_hdf5(f.name, self.hdf5_file)
-            self.to_remove.append(f.name)
+
+        self.to_remove.append(f.name)
+        to_hdf5(f.name, self.hdf5_file)
 
         exp = [('a', [(b"@a_0 orig_bc=abc new_bc=abc bc_diffs=0\nxyz\n+\n"
                        "ABC\n")]),