iotests: Remove explicit checks for qemu_img() == 0

qemu_img() returning zero ought to be the rule, not the
exception. Remove all explicit checks against the condition in
preparation for making non-zero returns an Exception.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220321201618.903471-4-jsnow@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>

tests/qemu-iotests/163

@@ -107,8 +107,7 @@ class ShrinkBaseClass(iotests.QMPTestCase):
 
         if iotests.imgfmt == 'raw':
             return
-        self.assertEqual(qemu_img('check', test_img), 0,
-                         "Verifying image corruption")
+        qemu_img('check', test_img)
 
     def test_empty_image(self):
         qemu_img('resize',  '-f', iotests.imgfmt, '--shrink', test_img,
@@ -130,8 +129,7 @@ class ShrinkBaseClass(iotests.QMPTestCase):
         qemu_img('resize',  '-f', iotests.imgfmt, '--shrink', test_img,
                  self.shrink_size)
 
-        self.assertEqual(qemu_img("compare", test_img, check_img), 0,
-                         "Verifying image content")
+        qemu_img("compare", test_img, check_img)
 
         self.image_verify()
 
@@ -146,8 +144,7 @@ class ShrinkBaseClass(iotests.QMPTestCase):
         qemu_img('resize',  '-f', iotests.imgfmt, '--shrink', test_img,
                  self.shrink_size)
 
-        self.assertEqual(qemu_img("compare", test_img, check_img), 0,
-                         "Verifying image content")
+        qemu_img("compare", test_img, check_img)
 
         self.image_verify()
 

tests/qemu-iotests/216

@@ -51,10 +51,10 @@ with iotests.FilePath('base.img') as base_img_path, \
     log('--- Setting up images ---')
     log('')
 
-    assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
+    qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M')
     assert qemu_io_silent(base_img_path, '-c', 'write -P 1 0M 1M') == 0
-    assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
-                    '-F', iotests.imgfmt, top_img_path) == 0
+    qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
+             '-F', iotests.imgfmt, top_img_path)
     assert qemu_io_silent(top_img_path,  '-c', 'write -P 2 1M 1M') == 0
 
     log('Done')

tests/qemu-iotests/218

@@ -145,7 +145,7 @@ log('')
 with iotests.VM() as vm, \
      iotests.FilePath('src.img') as src_img_path:
 
-    assert qemu_img('create', '-f', iotests.imgfmt, src_img_path, '64M') == 0
+    qemu_img('create', '-f', iotests.imgfmt, src_img_path, '64M')
     assert qemu_io_silent('-f', iotests.imgfmt, src_img_path,
                           '-c', 'write -P 42 0M 64M') == 0
 

tests/qemu-iotests/224

@@ -47,12 +47,11 @@ for filter_node_name in False, True:
          iotests.FilePath('top.img') as top_img_path, \
          iotests.VM() as vm:
 
-        assert qemu_img('create', '-f', iotests.imgfmt,
-                        base_img_path, '64M') == 0
-        assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
-                        '-F', iotests.imgfmt, mid_img_path) == 0
-        assert qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
-                        '-F', iotests.imgfmt, top_img_path) == 0
+        qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M')
+        qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
+                 '-F', iotests.imgfmt, mid_img_path)
+        qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
+                 '-F', iotests.imgfmt, top_img_path)
 
         # Something to commit
         assert qemu_io_silent(mid_img_path, '-c', 'write -P 1 0 1M') == 0

tests/qemu-iotests/228

@@ -54,11 +54,11 @@ with iotests.FilePath('base.img') as base_img_path, \
      iotests.FilePath('top.img') as top_img_path, \
      iotests.VM() as vm:
 
-    assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
+    qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M')
     # Choose a funny way to describe the backing filename
-    assert qemu_img('create', '-f', iotests.imgfmt, '-b',
-                    'file:' + base_img_path, '-F', iotests.imgfmt,
-                    top_img_path) == 0
+    qemu_img('create', '-f', iotests.imgfmt, '-b',
+             'file:' + base_img_path, '-F', iotests.imgfmt,
+             top_img_path)
 
     vm.launch()
 
@@ -172,8 +172,8 @@ with iotests.FilePath('base.img') as base_img_path, \
     # (because qemu cannot "canonicalize"/"resolve" the backing
     # filename unless the backing file is opened implicitly with the
     # overlay)
-    assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
-                    '-F', iotests.imgfmt, top_img_path) == 0
+    qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
+             '-F', iotests.imgfmt, top_img_path)
 
     # You can only reliably override backing options by using a node
     # reference (or by specifying file.filename, but, well...)

tests/qemu-iotests/257

@@ -240,8 +240,7 @@ def compare_images(image, reference, baseimg=None, expected_match=True):
     """
     expected_ret = 0 if expected_match else 1
     if baseimg:
-        assert qemu_img("rebase", "-u", "-b", baseimg, '-F', iotests.imgfmt,
-                        image) == 0
+        qemu_img("rebase", "-u", "-b", baseimg, '-F', iotests.imgfmt, image)
     ret = qemu_img("compare", image, reference)
     log('qemu_img compare "{:s}" "{:s}" ==> {:s}, {:s}'.format(
         image, reference,

tests/qemu-iotests/258

@@ -75,13 +75,13 @@ def test_concurrent_finish(write_to_stream_node):
 
         # It is important to use raw for the base layer (so that
         # permissions are just handed through to the protocol layer)
-        assert qemu_img('create', '-f', 'raw', node0_path, '64M') == 0
+        qemu_img('create', '-f', 'raw', node0_path, '64M')
 
         stream_throttle=None
         commit_throttle=None
 
         for path in [node1_path, node2_path, node3_path, node4_path]:
-            assert qemu_img('create', '-f', iotests.imgfmt, path, '64M') == 0
+            qemu_img('create', '-f', iotests.imgfmt, path, '64M')
 
         if write_to_stream_node:
             # This is what (most of the time) makes commit finish

tests/qemu-iotests/310

@@ -43,15 +43,15 @@ with iotests.FilePath('base.img') as base_img_path, \
     log('--- Setting up images ---')
     log('')
 
-    assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
+    qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M')
     assert qemu_io_silent(base_img_path, '-c', 'write -P 1 0M 1M') == 0
     assert qemu_io_silent(base_img_path, '-c', 'write -P 1 3M 1M') == 0
-    assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
-                    '-F', iotests.imgfmt, mid_img_path) == 0
+    qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
+             '-F', iotests.imgfmt, mid_img_path)
     assert qemu_io_silent(mid_img_path, '-c', 'write -P 3 2M 1M') == 0
     assert qemu_io_silent(mid_img_path, '-c', 'write -P 3 4M 1M') == 0
-    assert qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
-                    '-F', iotests.imgfmt, top_img_path) == 0
+    qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
+             '-F', iotests.imgfmt, top_img_path)
     assert qemu_io_silent(top_img_path, '-c', 'write -P 2 1M 1M') == 0
 
 #      0 1 2 3 4
@@ -105,8 +105,7 @@ with iotests.FilePath('base.img') as base_img_path, \
     log('')
 
     # Detach backing to check that we can read the data from the top level now
-    assert qemu_img('rebase', '-u', '-b', '', '-f', iotests.imgfmt,
-                    top_img_path) == 0
+    qemu_img('rebase', '-u', '-b', '', '-f', iotests.imgfmt, top_img_path)
 
     assert qemu_io_silent(top_img_path, '-c', 'read -P 0 0 1M') == 0
     assert qemu_io_silent(top_img_path, '-c', 'read -P 2 1M 1M') == 0

tests/qemu-iotests/tests/block-status-cache

@@ -35,8 +35,7 @@ nbd_sock = os.path.join(iotests.sock_dir, 'nbd.sock')
 class TestBscWithNbd(iotests.QMPTestCase):
     def setUp(self) -> None:
         """Just create an empty image with a read-only NBD server on it"""
-        assert qemu_img_create('-f', iotests.imgfmt, test_img,
-                               str(image_size)) == 0
+        qemu_img_create('-f', iotests.imgfmt, test_img, str(image_size))
 
         # Pass --allocation-depth to enable the qemu:allocation-depth context,
         # which we are going to query to provoke a block-status inquiry with

tests/qemu-iotests/tests/graph-changes-while-io

@@ -34,16 +34,15 @@ def do_qemu_img_bench() -> None:
     """
     Do some I/O requests on `nbd_sock`.
     """
-    assert qemu_img('bench', '-f', 'raw', '-c', '2000000',
-                    f'nbd+unix:///node0?socket={nbd_sock}') == 0
+    qemu_img('bench', '-f', 'raw', '-c', '2000000',
+             f'nbd+unix:///node0?socket={nbd_sock}')
 
 
 class TestGraphChangesWhileIO(QMPTestCase):
     def setUp(self) -> None:
         # Create an overlay that can be added at runtime on top of the
         # null-co block node that will receive I/O
-        assert qemu_img_create('-f', imgfmt, '-F', 'raw', '-b', 'null-co://',
-                               top) == 0
+        qemu_img_create('-f', imgfmt, '-F', 'raw', '-b', 'null-co://', top)
 
         # QSD instance with a null-co block node in an I/O thread,
         # exported over NBD (on `nbd_sock`, export name "node0")

tests/qemu-iotests/tests/image-fleecing

@@ -63,18 +63,18 @@ def do_test(vm, use_cbw, use_snapshot_access_filter, base_img_path,
     log('--- Setting up images ---')
     log('')
 
-    assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
+    qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M')
     if bitmap:
-        assert qemu_img('bitmap', '--add', base_img_path, 'bitmap0') == 0
+        qemu_img('bitmap', '--add', base_img_path, 'bitmap0')
 
     if use_snapshot_access_filter:
         assert use_cbw
-        assert qemu_img('create', '-f', 'raw', fleece_img_path, '64M') == 0
+        qemu_img('create', '-f', 'raw', fleece_img_path, '64M')
     else:
-        assert qemu_img('create', '-f', 'qcow2', fleece_img_path, '64M') == 0
+        qemu_img('create', '-f', 'qcow2', fleece_img_path, '64M')
 
     if push_backup:
-        assert qemu_img('create', '-f', 'qcow2', target_img_path, '64M') == 0
+        qemu_img('create', '-f', 'qcow2', target_img_path, '64M')
 
     for p in patterns:
         qemu_io('-f', iotests.imgfmt,

tests/qemu-iotests/tests/mirror-ready-cancel-error

@@ -31,10 +31,8 @@ target = os.path.join(iotests.test_dir, 'target.img')
 
 class TestMirrorReadyCancelError(iotests.QMPTestCase):
     def setUp(self) -> None:
-        assert iotests.qemu_img_create('-f', iotests.imgfmt, source,
-                                       str(image_size)) == 0
-        assert iotests.qemu_img_create('-f', iotests.imgfmt, target,
-                                       str(image_size)) == 0
+        iotests.qemu_img_create('-f', iotests.imgfmt, source, str(image_size))
+        iotests.qemu_img_create('-f', iotests.imgfmt, target, str(image_size))
 
         # Ensure that mirror will copy something before READY so the
         # target format layer will forward the pre-READY flush to its

tests/qemu-iotests/tests/mirror-top-perms

@@ -34,8 +34,7 @@ source = os.path.join(iotests.test_dir, 'source.img')
 
 class TestMirrorTopPerms(iotests.QMPTestCase):
     def setUp(self):
-        assert qemu_img('create', '-f', iotests.imgfmt, source,
-                        str(image_size)) == 0
+        qemu_img('create', '-f', iotests.imgfmt, source, str(image_size))
         self.vm = iotests.VM()
         self.vm.add_drive(source)
         self.vm.add_blockdev(f'null-co,node-name=null,size={image_size}')

tests/qemu-iotests/tests/remove-bitmap-from-backing

@@ -27,11 +27,11 @@ iotests.script_initialize(supported_fmts=['qcow2'],
 top, base = iotests.file_path('top', 'base')
 size = '1M'
 
-assert qemu_img_create('-f', iotests.imgfmt, base, size) == 0
-assert qemu_img_create('-f', iotests.imgfmt, '-b', base,
-                       '-F', iotests.imgfmt, top, size) == 0
+qemu_img_create('-f', iotests.imgfmt, base, size)
+qemu_img_create('-f', iotests.imgfmt, '-b', base,
+                '-F', iotests.imgfmt, top, size)
 
-assert qemu_img('bitmap', '--add', base, 'bitmap0') == 0
+qemu_img('bitmap', '--add', base, 'bitmap0')
 # Just assert that our method of checking bitmaps in the image works.
 assert 'bitmaps' in qemu_img_pipe('info', base)
 

tests/qemu-iotests/tests/stream-error-on-reset

@@ -54,9 +54,9 @@ class TestStreamErrorOnReset(QMPTestCase):
           to it will result in an error
         - top image is attached to a virtio-scsi device
         """
-        assert qemu_img_create('-f', imgfmt, base, str(image_size)) == 0
+        qemu_img_create('-f', imgfmt, base, str(image_size))
         assert qemu_io_silent('-c', f'write 0 {data_size}', base) == 0
-        assert qemu_img_create('-f', imgfmt, top, str(image_size)) == 0
+        qemu_img_create('-f', imgfmt, top, str(image_size))
 
         self.vm = iotests.VM()
         self.vm.add_args('-accel', 'tcg') # Make throttling work properly