bhyve: add xml2args unittest

At this point unittest covers 4 basic cases:

 - minimal working XML for bhyve
 - same as above, but with virtio disk
 - ACPI and APIC args test
 - MAC address test

tests/bhyvexml2argvtest.c

@@ -0,0 +1,151 @@
+#include <config.h>
+
+#include "testutils.h"
+
+#ifdef WITH_BHYVE
+
+# include "datatypes.h"
+
+# include "bhyve/bhyve_utils.h"
+# include "bhyve/bhyve_command.h"
+
+# define VIR_FROM_THIS VIR_FROM_BHYVE
+
+static bhyveConn driver;
+
+static virCapsPtr
+testBhyveBuildCapabilities(void)
+{
+    virCapsPtr caps;
+    virCapsGuestPtr guest;
+
+    if ((caps = virCapabilitiesNew(virArchFromHost(),
+                                   0, 0)) == NULL)
+        return NULL;
+
+    if ((guest = virCapabilitiesAddGuest(caps, "hvm",
+                                         VIR_ARCH_X86_64,
+                                         "bhyve",
+                                         NULL, 0, NULL)) == NULL)
+        goto error;
+
+    if (virCapabilitiesAddGuestDomain(guest,
+                                      "bhyve", NULL, NULL, 0, NULL) == NULL)
+        goto error;
+
+    return caps;
+
+ error:
+    virObjectUnref(caps);
+    return NULL;
+}
+
+static int testCompareXMLToArgvFiles(const char *xml,
+                                     const char *cmdline)
+{
+    char *expectargv = NULL;
+    int len;
+    char *actualargv = NULL;
+    virDomainDefPtr vmdef = NULL;
+    virDomainObj vm;
+    virCommandPtr cmd = NULL;
+    int ret = -1;
+
+
+    if (!(vmdef = virDomainDefParseFile(xml, driver.caps, driver.xmlopt,
+                                        1 << VIR_DOMAIN_VIRT_BHYVE,
+                                        VIR_DOMAIN_XML_INACTIVE)))
+        goto out;
+
+    vm.def = vmdef;
+
+    if (!(cmd = virBhyveProcessBuildBhyveCmd(&driver, &vm)))
+        goto out;
+
+    if (!(actualargv = virCommandToString(cmd)))
+        goto out;
+
+    len = virtTestLoadFile(cmdline, &expectargv);
+    if (len < 0)
+        goto out;
+
+    if (len && expectargv[len - 1] == '\n')
+        expectargv[len - 1] = '\0';
+
+    if (STRNEQ(expectargv, actualargv)) {
+        virtTestDifference(stderr, expectargv, actualargv);
+        goto out;
+    }
+
+    ret = 0;
+
+ out:
+    VIR_FREE(expectargv);
+    VIR_FREE(actualargv);
+    virCommandFree(cmd);
+    virDomainDefFree(vmdef);
+    return ret;
+}
+
+static int
+testCompareXMLToArgvHelper(const void *data)
+{
+    int ret = -1;
+    const char *name = data;
+    char *xml = NULL;
+    char *args = NULL;
+
+    if (virAsprintf(&xml, "%s/bhyvexml2argvdata/bhyvexml2argv-%s.xml",
+                    abs_srcdir, name) < 0 ||
+        virAsprintf(&args, "%s/bhyvexml2argvdata/bhyvexml2argv-%s.args",
+                    abs_srcdir, name) < 0)
+        goto cleanup;
+
+    ret = testCompareXMLToArgvFiles(xml, args);
+
+ cleanup:
+    VIR_FREE(xml);
+    VIR_FREE(args);
+    return ret;
+}
+
+static int
+mymain(void)
+{
+    int ret = 0;
+
+    if ((driver.caps = testBhyveBuildCapabilities()) == NULL)
+        return EXIT_FAILURE;
+
+    if ((driver.xmlopt = virDomainXMLOptionNew(NULL, NULL, NULL)) == NULL)
+        return EXIT_FAILURE;
+
+# define DO_TEST(name)                                        \
+    do {                                                      \
+        if (virtTestRun("BHYVE XML-2-ARGV " name,             \
+                       testCompareXMLToArgvHelper, name) < 0) \
+            ret = -1;                                         \
+    } while (0)
+
+
+    DO_TEST("base");
+    DO_TEST("acpiapic");
+    DO_TEST("disk-virtio");
+    DO_TEST("macaddr");
+
+    virObjectUnref(driver.caps);
+    virObjectUnref(driver.xmlopt);
+
+    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+VIRT_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/bhyvexml2argvmock.so")
+
+#else
+
+int main(void)
+{
+    return EXIT_AM_SKIP;
+}
+
+#endif /* WITH_BHYVE */