[libvirt PATCH v2 1/1] tests: Introduce virhostdevmock

[Andrea Bolognani]

We need this for all tests that use virHostdevManager, because
during creation of this object for unprivileged connections
like those used in the test suite we would end up writing inside
the user's home directory.

That's bad manners in general, but when running the test suite
inside a purposefully constrained environment such as the one
exposed by pbuilder, it turns into an outright test failure:

  Could not initialize HostdevManager - operation failed: Failed
  to create state dir '/nonexistent/.cache/libvirt/hostdevmgr'

Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 tests/Makefile.am       |  7 +++++++
 tests/qemuhotplugtest.c |  1 +
 tests/virhostdevmock.c  | 29 +++++++++++++++++++++++++++++
 tests/virhostdevtest.c  |  4 +++-
 4 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 tests/virhostdevmock.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index ada5b8fc57..fc516376b4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -212,6 +212,7 @@ test_libraries = libshunload.la \
 	libvirnetdaemonmock.la \
 	libvirnetserverclientmock.la \
 	libvircgroupmock.la \
+	libvirhostdevmock.la \
 	libvirpcimock.la \
 	libvirnetdevmock.la \
 	libvirrandommock.la \
@@ -1226,6 +1227,12 @@ libvirfilecachemock_la_SOURCES = \
 libvirfilecachemock_la_LDFLAGS = $(MOCKLIBS_LDFLAGS)
 libvirfilecachemock_la_LIBADD = $(MOCKLIBS_LIBS)
 
+libvirhostdevmock_la_SOURCES = \
+	virhostdevmock.c \
+	$(NULL)
+libvirhostdevmock_la_LDFLAGS = $(MOCKLIBS_LDFLAGS)
+libvirhostdevmock_la_LIBADD = $(MOCKLIBS_LIBS)
+
 if WITH_LINUX
 vircaps2xmltest_SOURCES = \
 	vircaps2xmltest.c testutils.h testutils.c virfilewrapper.h virfilewrapper.c
diff --git a/tests/qemuhotplugtest.c b/tests/qemuhotplugtest.c
index 9a215ab303..cf87de187f 100644
--- a/tests/qemuhotplugtest.c
+++ b/tests/qemuhotplugtest.c
@@ -900,6 +900,7 @@ mymain(void)
 }
 
 VIR_TEST_MAIN_PRELOAD(mymain,
+                      VIR_TEST_MOCK("virhostdev"),
                       VIR_TEST_MOCK("virpci"),
                       VIR_TEST_MOCK("domaincaps"),
                       VIR_TEST_MOCK("virprocess"),
diff --git a/tests/virhostdevmock.c b/tests/virhostdevmock.c
new file mode 100644
index 0000000000..8658d9affd
--- /dev/null
+++ b/tests/virhostdevmock.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2020 Red Hat, Inc.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#include <config.h>
+
+#include "virutil.h"
+#include "virmock.h"
+
+static char *(*real_virGetUserRuntimeDirectory)(void);
+
+static void
+init_syms(void)
+{
+    if (real_virGetUserRuntimeDirectory)
+        return;
+
+    VIR_MOCK_REAL_INIT(virGetUserRuntimeDirectory);
+}
+
+char *
+virGetUserRuntimeDirectory(void)
+{
+    init_syms();
+
+    return g_build_filename(g_getenv("LIBVIRT_FAKE_ROOT_DIR"),
+                            "user-runtime-directory", NULL);
+}
diff --git a/tests/virhostdevtest.c b/tests/virhostdevtest.c
index b6260bd9c1..b0bad683a8 100644
--- a/tests/virhostdevtest.c
+++ b/tests/virhostdevtest.c
@@ -628,7 +628,9 @@ mymain(void)
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
-VIR_TEST_MAIN_PRELOAD(mymain, VIR_TEST_MOCK("virpci"))
+VIR_TEST_MAIN_PRELOAD(mymain,
+                      VIR_TEST_MOCK("virhostdev"),
+                      VIR_TEST_MOCK("virpci"))
 #else
 int
 main(void)
-- 
2.25.4