[Qemu-devel] [PATCH v10 10/30] qapi: More tests of input arrays

[Eric Blake <eblake@redhat.com>]

Our testsuite had no coverage of empty arrays, nor of what
happens when the input does not match the expected type.
Useful to have, especially if we start changing the visitor
contracts.

I did not think it worth duplicating these additions to
test-qmp-input-strict; since all strict mode does is add
the ability to reject JSON input that has more keys than
what the visitor expects, yet the additions in this patch
error out earlier than that point regardless of whether
strict mode was requested.

Signed-off-by: Eric Blake <eblake@redhat.com>

---
v10: rebase to earlier changes, more in commit message
v9: move earlier in series (was 16/17)
v8: no change
v7: no change
v6: new patch
---
 tests/test-qmp-input-visitor.c | 52 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/tests/test-qmp-input-visitor.c b/tests/test-qmp-input-visitor.c
index b9b0c31..6a94683 100644
--- a/tests/test-qmp-input-visitor.c
+++ b/tests/test-qmp-input-visitor.c
@@ -231,6 +231,12 @@ static void test_visitor_in_list(TestInputVisitorData *data,
     }

     qapi_free_UserDefOneList(head);
+    head = NULL;
+
+    /* An empty list is valid */
+    v = visitor_input_test_init(data, "[]");
+    visit_type_UserDefOneList(v, &head, NULL, &error_abort);
+    g_assert(!head);
 }

 static void test_visitor_in_any(TestInputVisitorData *data,
@@ -720,6 +726,50 @@ static void test_visitor_in_errors(TestInputVisitorData *data,
     qapi_free_strList(q);
 }

+static void test_visitor_in_wrong_type(TestInputVisitorData *data,
+                                       const void *unused)
+{
+    TestStruct *p = NULL;
+    Visitor *v;
+    strList *q = NULL;
+    int64_t i;
+    Error *err = NULL;
+
+    /* Make sure arrays and structs cannot be confused */
+
+    v = visitor_input_test_init(data, "[]");
+    visit_type_TestStruct(v, &p, NULL, &err);
+    error_free_or_abort(&err);
+    g_assert(!p);
+
+    v = visitor_input_test_init(data, "{}");
+    visit_type_strList(v, &q, NULL, &err);
+    error_free_or_abort(&err);
+    assert(!q);
+
+    /* Make sure primitives and struct cannot be confused */
+
+    v = visitor_input_test_init(data, "1");
+    visit_type_TestStruct(v, &p, NULL, &err);
+    error_free_or_abort(&err);
+    g_assert(!p);
+
+    v = visitor_input_test_init(data, "{}");
+    visit_type_int(v, &i, NULL, &err);
+    error_free_or_abort(&err);
+
+    /* Make sure primitives and arrays cannot be confused */
+
+    v = visitor_input_test_init(data, "1");
+    visit_type_strList(v, &q, NULL, &err);
+    error_free_or_abort(&err);
+    assert(!q);
+
+    v = visitor_input_test_init(data, "[]");
+    visit_type_int(v, &i, NULL, &err);
+    error_free_or_abort(&err);
+}
+
 int main(int argc, char **argv)
 {
     TestInputVisitorData in_visitor_data;
@@ -752,6 +802,8 @@ int main(int argc, char **argv)
                            &in_visitor_data, test_visitor_in_alternate);
     input_visitor_test_add("/visitor/input/errors",
                            &in_visitor_data, test_visitor_in_errors);
+    input_visitor_test_add("/visitor/input/wrong-type",
+                           &in_visitor_data, test_visitor_in_wrong_type);
     input_visitor_test_add("/visitor/input/alternate-number",
                            &in_visitor_data, test_visitor_in_alternate_number);
     input_visitor_test_add("/visitor/input/native_list/int",
-- 
2.4.3