[libvirt] [PATCH 1/1] qemuxml2xmltest.c: mock /etc/qemu/firmware path

[Daniel Henrique Barboza]

Since commit 'b66ca0220a' the 'tpm-emulator' tests in qemuxml2xmltest
started to fail unless 'make check' is either executed as root
or with an user with access to /etc/qemu/firmware file. This is the
error that happens in a regular 'make check' run with an unprivileged
user:

------

 546) QEMU XML-2-XML-inactive tpm-emulator                              ...
1315 In '/home/danielhb/kvm-project/libvirt/tests/qemuxml2xmloutdata/tpm-emulator.xml':
1316 Offset 909
1317 Expect [1.2]
1318 Actual [default]
1319                                                                       ... Expected result      code=0 but received code=4libvirt:  error : cannot open directory '/home/danielhb/kvm-pr     oject/libvirt/usr/etc/qemu/firmware': Permission denied
1320 FAILED
1321 547) QEMU XML-2-XML-active tpm-emulator                                ...
1322 In '/home/danielhb/kvm-project/libvirt/tests/qemuxml2xmloutdata/tpm-emulator.xml':
1323 Offset 909
1324 Expect [1.2]
1325 Actual [default]
1326                                                                       ... Expected result      code=0 but received code=4libvirt:  error : cannot open directory '/home/danielhb/kvm-pr     oject/libvirt/usr/etc/qemu/firmware': Permission denied
1327 FAILED

------

The reason is that commit b66ca0220a changed the domain validation to
fetch the capabilities in qemuDomainDeviceDefValidate time, directly
impacting existing tpm-emulator tests in qemuxml2xmltest.c that
that since then will attempt to read the /etc/qemu/firmware file
that wasn't being mocked.

This patch fixes it by adding the mock paths for /etc/qemu/firmware
in qemuxml2xmltest.c as well, using the virFileWrapper API like it
is done in commit 5b9819eedc71.

Fixes: b66ca0220a ("qemu: domain: Call virDomainCapsDeviceDefValidate")
Signed-off-by: Daniel Henrique Barboza <danielhb413 at gmail.com>
---
 tests/Makefile.am       |  3 ++-
 tests/qemuxml2xmltest.c | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 1c92e3ca6f..31a22ebefd 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -573,7 +573,8 @@ qemuxml2argvmock_la_LIBADD = $(MOCKLIBS_LIBS)
 
 qemuxml2xmltest_SOURCES = \
 	qemuxml2xmltest.c testutilsqemu.c testutilsqemu.h \
-	testutils.c testutils.h
+	testutils.c testutils.h \
+	virfilewrapper.c virfilewrapper.h
 qemuxml2xmltest_LDADD = $(qemu_LDADDS)
 
 qemumonitorjsontest_SOURCES = \
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 525eb9a740..51be6e0263 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -14,6 +14,9 @@
 # include "qemu/qemu_domain.h"
 # include "testutilsqemu.h"
 # include "virstring.h"
+# include "virfilewrapper.h"
+# include "testutils.h"
+# include "configmake.h"
 
 # define VIR_FROM_THIS VIR_FROM_NONE
 
@@ -167,6 +170,15 @@ mymain(void)
 
     setenv("LIBVIRT_FAKE_ROOT_DIR", fakerootdir, 1);
 
+    /* Required for tpm-emulator tests
+     */
+    virFileWrapperAddPrefix(SYSCONFDIR "/qemu/firmware",
+                            abs_srcdir "/qemufirmwaredata/etc/qemu/firmware");
+    virFileWrapperAddPrefix(PREFIX "/share/qemu/firmware",
+                            abs_srcdir "/qemufirmwaredata/usr/share/qemu/firmware");
+    virFileWrapperAddPrefix("/home/user/.config/qemu/firmware",
+                            abs_srcdir "/qemufirmwaredata/home/user/.config/qemu/firmware");
+
     if (qemuTestDriverInit(&driver) < 0)
         return EXIT_FAILURE;
 
@@ -1325,6 +1337,7 @@ mymain(void)
     virHashFree(capslatest);
     qemuTestDriverFree(&driver);
     VIR_FREE(fakerootdir);
+    virFileWrapperClearPrefixes();
 
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
-- 
2.21.0