[PATCH 1/5] tests/functional: skip test if QEMU_TEST_QEMU_BINARY is not set

["Daniel P. Berrangé" <berrange@redhat.com>]

If QEMU_TEST_QEMU_BINARY is not set we currently assert in the setUp
function, resulting in a big traceback:

    TAP version 13
    Traceback (most recent call last):
      File "/var/home/berrange/src/virt/qemu/tests/functional/qemu_test/testcase.py", line 280, in setUp
        super().setUp('qemu-system-')
        ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
      File "/var/home/berrange/src/virt/qemu/tests/functional/qemu_test/testcase.py", line 196, in setUp
        self.assertIsNotNone(self.qemu_bin, 'QEMU_TEST_QEMU_BINARY must be set')
        ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    AssertionError: unexpectedly None : QEMU_TEST_QEMU_BINARY must be set

    not ok 1 test_ppc_405.Ppc405Machine.test_ppc_ref405ep
    1..1

For every other test pre-requisite that's missing we will mark the test
as skipped. This does the same for missing QEMU_TEST_QEMU_BINARY, such
that we get

    TAP version 13
    ok 1 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    ok 2 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest_noapic_nomsi # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    ok 3 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest_nomsi # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    ok 4 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest_novector # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    ok 5 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest_novector_noapic # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    ok 6 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest_novector_nomsi # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    ok 7 test_x86_64_kvm_xen.KVMXenGuest.test_kvm_xen_guest_vapic # SKIP QEMU_TEST_QEMU_BINARY env variable is not set
    1..7

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/functional/qemu_test/testcase.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/functional/qemu_test/testcase.py b/tests/functional/qemu_test/testcase.py
index 869f3949fe..94541e8bfb 100644
--- a/tests/functional/qemu_test/testcase.py
+++ b/tests/functional/qemu_test/testcase.py
@@ -193,7 +193,9 @@ def assets_available(self):
         return True
 
     def setUp(self, bin_prefix):
-        self.assertIsNotNone(self.qemu_bin, 'QEMU_TEST_QEMU_BINARY must be set')
+        if self.qemu_bin is None:
+            self.skipTest("QEMU_TEST_QEMU_BINARY env variable is not set")
+
         self.arch = self.qemu_bin.split('-')[-1]
         self.socketdir = None
 
-- 
2.47.1