iotests: remove remaining calls to qemu_img_pipe()

As part of moving all python iotest invocations of qemu-img onto a
single qemu_img() implementation, remove a few lingering uses of
qemu_img_pipe() from outside of iotests.py itself.

Several cases here rely on the knowledge that qemu_img_pipe() suppresses
*all* output on a successful case when the command being issued is
'create'.

065: This call's output is inspected, but it appears as if it's expected
     to succeed. Replace this call with the checked qemu_img() variant
     instead to get better diagnostics if/when qemu-img itself fails.

237: "create" call output isn't actually logged. Use qemu_img_create()
     instead, which checks the return code. Remove the empty lines from
     the test output.

296: Two calls;
     -create: Expected to succeed. Like other create calls, the output
              isn't actually logged.  Switch to a checked variant
              (qemu_img_create) instead. The output for this test is
              a mixture of both test styles, so actually replace the
              blank line for readability.
     -amend:  This is expected to fail. Log the output.

After this patch, the only uses of qemu_img_pipe are internal to
iotests.py and will be removed in subsequent patches.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220321201618.903471-15-jsnow@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>

tests/qemu-iotests/065

@@ -24,7 +24,7 @@ import os
 import re
 import json
 import iotests
-from iotests import qemu_img, qemu_img_info, qemu_img_pipe
+from iotests import qemu_img, qemu_img_info
 import unittest
 
 test_img = os.path.join(iotests.test_dir, 'test.img')
@@ -54,7 +54,7 @@ class TestQemuImgInfo(TestImageInfoSpecific):
         self.assertEqual(data['data'], self.json_compare)
 
     def test_human(self):
-        data = qemu_img_pipe('info', '--output=human', test_img).split('\n')
+        data = qemu_img('info', '--output=human', test_img).stdout.split('\n')
         data = data[(data.index('Format specific information:') + 1)
                     :data.index('')]
         for field in data:

tests/qemu-iotests/237

@@ -165,8 +165,7 @@ with iotests.FilePath('t.vmdk') as disk_path, \
     iotests.log("")
 
     for path in [ extent1_path, extent2_path, extent3_path ]:
-        msg = iotests.qemu_img_pipe('create', '-f', imgfmt, path, '0')
-        iotests.log(msg, [iotests.filter_testfiles])
+        iotests.qemu_img_create('-f', imgfmt, path, '0')
 
     vm.add_blockdev('driver=file,filename=%s,node-name=ext1' % (extent1_path))
     vm.add_blockdev('driver=file,filename=%s,node-name=ext2' % (extent2_path))

tests/qemu-iotests/237.out

@@ -129,9 +129,6 @@ Job failed: Cannot find device='this doesn't exist' nor node-name='this doesn't
 
 === Other subformats ===
 
-
-
-
 == Missing extent ==
 
 {"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"driver": "vmdk", "file": "node0", "size": 33554432, "subformat": "monolithicFlat"}}}

tests/qemu-iotests/296

@@ -76,7 +76,7 @@ class EncryptionSetupTestCase(iotests.QMPTestCase):
     # create the encrypted block device using qemu-img
     def createImg(self, file, secret):
 
-        output = iotests.qemu_img_pipe(
+        iotests.qemu_img(
             'create',
             '--object', *secret.to_cmdline_object(),
             '-f', iotests.imgfmt,
@@ -84,8 +84,7 @@ class EncryptionSetupTestCase(iotests.QMPTestCase):
             '-o', 'iter-time=10',
             file,
             '1M')
-
-        iotests.log(output, filters=[iotests.filter_test_dir])
+        iotests.log('')
 
     # attempts to add a key using qemu-img
     def addKey(self, file, secret, new_secret):
@@ -99,7 +98,7 @@ class EncryptionSetupTestCase(iotests.QMPTestCase):
                 }
             }
 
-        output = iotests.qemu_img_pipe(
+        output = iotests.qemu_img(
             'amend',
             '--object', *secret.to_cmdline_object(),
             '--object', *new_secret.to_cmdline_object(),
@@ -108,8 +107,9 @@ class EncryptionSetupTestCase(iotests.QMPTestCase):
             '-o', 'new-secret=' + new_secret.id(),
             '-o', 'iter-time=10',
 
-            "json:" + json.dumps(image_options)
-            )
+            "json:" + json.dumps(image_options),
+            check=False  # Expected to fail. Log output.
+        ).stdout
 
         iotests.log(output, filters=[iotests.filter_test_dir])