qapi-schema: test: add a unit test for parsing array alternates

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220321164243.200569-4-pbonzini@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Dead code dropped in test_visitor_in_alternate_list()]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

tests/qapi-schema/qapi-schema-test.json

@@ -119,6 +119,7 @@
 { 'alternate': 'AltEnumNum', 'data': { 'e': 'EnumOne', 'n': 'number' } }
 { 'alternate': 'AltNumEnum', 'data': { 'n': 'number', 'e': 'EnumOne' } }
 { 'alternate': 'AltEnumInt', 'data': { 'e': 'EnumOne', 'i': 'int' } }
+{ 'alternate': 'AltListInt', 'data': { 'l': ['int'], 'i': 'int' } }
 
 # for testing use of 'str' within alternates
 { 'alternate': 'AltStrObj', 'data': { 's': 'str', 'o': 'TestStruct' } }

tests/qapi-schema/qapi-schema-test.out

@@ -121,6 +121,10 @@ alternate AltEnumInt
     tag type
     case e: EnumOne
     case i: int
+alternate AltListInt
+    tag type
+    case l: intList
+    case i: int
 alternate AltStrObj
     tag type
     case s: str

tests/unit/test-qobject-input-visitor.c

@@ -775,6 +775,7 @@ static void test_visitor_in_alternate_number(TestInputVisitorData *data,
     AltEnumNum *aen;
     AltNumEnum *ans;
     AltEnumInt *asi;
+    AltListInt *ali;
 
     /* Parsing an int */
 
@@ -801,6 +802,12 @@ static void test_visitor_in_alternate_number(TestInputVisitorData *data,
     g_assert_cmpint(asi->u.i, ==, 42);
     qapi_free_AltEnumInt(asi);
 
+    v = visitor_input_test_init(data, "42");
+    visit_type_AltListInt(v, NULL, &ali, &error_abort);
+    g_assert_cmpint(ali->type, ==, QTYPE_QNUM);
+    g_assert_cmpint(ali->u.i, ==, 42);
+    qapi_free_AltListInt(ali);
+
     /* Parsing a double */
 
     v = visitor_input_test_init(data, "42.5");
@@ -826,6 +833,37 @@ static void test_visitor_in_alternate_number(TestInputVisitorData *data,
     qapi_free_AltEnumInt(asi);
 }
 
+static void test_visitor_in_alternate_list(TestInputVisitorData *data,
+                                 const void *unused)
+{
+    intList *item;
+    Visitor *v;
+    AltListInt *ali;
+    int i;
+
+    v = visitor_input_test_init(data, "[ 42, 43, 44 ]");
+    visit_type_AltListInt(v, NULL, &ali, &error_abort);
+    g_assert(ali != NULL);
+
+    g_assert_cmpint(ali->type, ==, QTYPE_QLIST);
+    for (i = 0, item = ali->u.l; item; item = item->next, i++) {
+        g_assert_cmpint(item->value, ==, 42 + i);
+    }
+
+    qapi_free_AltListInt(ali);
+    ali = NULL;
+
+    /* An empty list is valid */
+    v = visitor_input_test_init(data, "[]");
+    visit_type_AltListInt(v, NULL, &ali, &error_abort);
+    g_assert(ali != NULL);
+
+    g_assert_cmpint(ali->type, ==, QTYPE_QLIST);
+    g_assert(!ali->u.l);
+    qapi_free_AltListInt(ali);
+    ali = NULL;
+}
+
 static void input_visitor_test_add(const char *testpath,
                                    const void *user_data,
                                    void (*test_func)(TestInputVisitorData *data,
@@ -1187,6 +1225,8 @@ int main(int argc, char **argv)
                            NULL, test_visitor_in_wrong_type);
     input_visitor_test_add("/visitor/input/alternate-number",
                            NULL, test_visitor_in_alternate_number);
+    input_visitor_test_add("/visitor/input/alternate-list",
+                           NULL, test_visitor_in_alternate_list);
     input_visitor_test_add("/visitor/input/fail/struct",
                            NULL, test_visitor_in_fail_struct);
     input_visitor_test_add("/visitor/input/fail/struct-nested",