virschematest: Add possibility to have exceptions from the '-invalid' suffix

The exception is needed in qemuxml2xmltest which is in one instance
testing update from an invalid config to a valid one. Currently the
compliance with the test is achieved via a hack.

As further patches will be simpler without the hack present we need a
way to invert the expected output in specific cases.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

tests/qemuxml2xmloutdata/disk-cdrom-empty-network-invalid-inactive.x86_64-latest.xml

@@ -1 +0,0 @@
-disk-cdrom-empty-network-invalid-active.x86_64-latest.xml

tests/virschematest.c

@@ -33,6 +33,9 @@ struct testSchemaEntry {
     /* if dirRegex is non-NULL the provided regular expression is used to match
      * the file names in a directory (without path prefixed) and only matching
      * files are validated */
+    const char **exceptions; /* optional NULL terminated list of filenames inside
+                                directory where the expected validation result is
+                                inverted */
     const char *dirRegex;
     const char *file;
 };
@@ -40,6 +43,7 @@ struct testSchemaEntry {
 
 struct testSchemaData {
     virXMLValidator *validator;
+    bool exception;
     const char *xml_path;
 };
 
@@ -53,6 +57,9 @@ testSchemaValidateXML(const void *args)
     bool shouldFail = !!strstr(data->xml_path, "-invalid.");
     g_autoptr(xmlDoc) xml = NULL;
 
+    if (data->exception)
+        shouldFail = !shouldFail;
+
     if (!(xml = virXMLParseFileCtxt(data->xml_path, NULL)))
         return -1;
 
@@ -66,12 +73,14 @@ testSchemaValidateXML(const void *args)
 static int
 testSchemaFile(const char *schema,
                virXMLValidator *validator,
-               const char *path)
+               const char *path,
+               bool exception)
 {
     g_autofree char *test_name = NULL;
     struct testSchemaData data = {
         .validator = validator,
         .xml_path = path,
+        .exception = exception,
     };
 
     test_name = g_strdup_printf("Checking %s against %s", path, schema);
@@ -84,7 +93,7 @@ static int
 testSchemaDir(const char *schema,
               virXMLValidator *validator,
               const char *dir_path,
-              const char *filterstr)
+              const struct testSchemaEntry *entry)
 {
     g_autoptr(DIR) dir = NULL;
     struct dirent *ent;
@@ -97,17 +106,18 @@ testSchemaDir(const char *schema,
         return -1;
     }
 
-    if (filterstr) {
+    if (entry->dirRegex) {
         g_autoptr(GError) err = NULL;
 
-        if (!(filter = g_regex_new(filterstr, 0, 0, &err))) {
+        if (!(filter = g_regex_new(entry->dirRegex, 0, 0, &err))) {
-            VIR_TEST_VERBOSE("\nfailed to compile regex '%s': %s", filterstr, err->message);
+            VIR_TEST_VERBOSE("\nfailed to compile regex '%s': %s", entry->dirRegex, err->message);
             return -1;
         }
     }
 
     while ((rc = virDirRead(dir, &ent, dir_path)) > 0) {
         g_autofree char *xml_path = NULL;
+        bool exception = false;
 
         if (!virStringHasSuffix(ent->d_name, ".xml"))
             continue;
@@ -117,9 +127,12 @@ testSchemaDir(const char *schema,
             !g_regex_match(filter, ent->d_name, 0, NULL))
             continue;
 
+        if (entry->exceptions)
+            exception = g_strv_contains(entry->exceptions, ent->d_name);
+
         xml_path = g_strdup_printf("%s/%s", dir_path, ent->d_name);
 
-        if (testSchemaFile(schema, validator, xml_path) < 0)
+        if (testSchemaFile(schema, validator, xml_path, exception) < 0)
             ret = -1;
     }
 
@@ -190,14 +203,14 @@ testSchemaEntries(const char *schema,
         if (entry->dir) {
             g_autofree char *path = g_strdup_printf("%s/%s", abs_top_srcdir, entry->dir);
 
-            if (testSchemaDir(schema, validator, path, entry->dirRegex) < 0)
+            if (testSchemaDir(schema, validator, path, entry) < 0)
                 ret = -1;
         }
 
         if (entry->file) {
             g_autofree char *path = g_strdup_printf("%s/%s", abs_top_srcdir, entry->file);
 
-            if (testSchemaFile(schema, validator, path) < 0)
+            if (testSchemaFile(schema, validator, path, false) < 0)
                 ret = -1;
         }
     }
@@ -212,11 +225,20 @@ static const struct testSchemaEntry schemaCapability[] = {
     { .dir = "tests/qemucaps2xmloutdata" },
 };
 
+
+/* give exceptions for output files of invalid input XMLs */
+static const char *exceptions_qemuxml2xmloutdata[] = {
+    "disk-cdrom-empty-network-invalid.x86_64-latest.xml",
+    NULL
+};
+
 static const struct testSchemaEntry schemaDomain[] = {
     { .dir = "tests/domainschemadata" },
     { .dir = "tests/qemuxml2argvdata" },
     { .dir = "tests/xmconfigdata" },
-    { .dir = "tests/qemuxml2xmloutdata" },
+    { .dir = "tests/qemuxml2xmloutdata",
+      .exceptions = exceptions_qemuxml2xmloutdata,
+    },
     { .dir = "tests/lxcxml2xmldata" },
     { .dir = "tests/lxcxml2xmloutdata" },
     { .dir = "tests/bhyvexml2argvdata" },