qemuxml2argvtest: Set more fake drivers

So far we are setting only fake secret and storage drivers.
Therefore if the code wants to call a public NWFilter API (like
qemuBuildInterfaceCommandLine() and qemuBuildNetCommandLine() are
doing) the virGetConnectNWFilter() function will try to actually
spawn session daemon because there's no connection object set to
handle NWFilter driver.

Even though I haven't experienced the same problem with the rest
of the drivers (interface, network and node dev), the reasoning
above can be applied to them as well.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

tests/qemuxml2argvtest.c

@@ -262,6 +262,33 @@ static virStorageDriver fakeStorageDriver = {
     .storagePoolIsActive = fakeStoragePoolIsActive,
 };
 
+
+/* virNetDevOpenvswitchGetVhostuserIfname mocks a portdev name - handle that */
+static virNWFilterBindingPtr
+fakeNWFilterBindingLookupByPortDev(virConnectPtr conn,
+                                   const char *portdev)
+{
+    if (STREQ(portdev, "vhost-user0"))
+        return virGetNWFilterBinding(conn, "fake_vnet0", "fakeFilterName");
+
+    virReportError(VIR_ERR_NO_NWFILTER_BINDING,
+                   "no nwfilter binding for port dev '%s'", portdev);
+    return NULL;
+}
+
+
+static int
+fakeNWFilterBindingDelete(virNWFilterBindingPtr binding ATTRIBUTE_UNUSED)
+{
+    return 0;
+}
+
+
+static virNWFilterDriver fakeNWFilterDriver = {
+    .nwfilterBindingLookupByPortDev = fakeNWFilterBindingLookupByPortDev,
+    .nwfilterBindingDelete = fakeNWFilterBindingDelete,
+};
+
 typedef enum {
     FLAG_EXPECT_FAILURE     = 1 << 0,
     FLAG_EXPECT_PARSE_ERROR = 1 << 1,
@@ -470,7 +497,12 @@ testCompareXMLToArgv(const void *data)
 
     conn->secretDriver = &fakeSecretDriver;
     conn->storageDriver = &fakeStorageDriver;
+    conn->nwfilterDriver = &fakeNWFilterDriver;
 
+    virSetConnectInterface(conn);
+    virSetConnectNetwork(conn);
+    virSetConnectNWFilter(conn);
+    virSetConnectNodeDev(conn);
     virSetConnectSecret(conn);
     virSetConnectStorage(conn);