[Qemu-devel] [PATCH v3 5/5] tests: Add check-qobject for equality tests

[Max Reitz <mreitz@redhat.com>]

Add a new test file (check-qobject.c) for unit tests that concern
QObjects as a whole.

Its only purpose for now is to test the qobject_is_equal() function.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/Makefile.include |   4 +-
 tests/check-qobject.c  | 312 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 315 insertions(+), 1 deletion(-)
 create mode 100644 tests/check-qobject.c

diff --git a/tests/Makefile.include b/tests/Makefile.include
index c738e92..ff0022d 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -18,6 +18,7 @@ check-unit-y += tests/check-qlist$(EXESUF)
 gcov-files-check-qlist-y = qobject/qlist.c
 check-unit-y += tests/check-qnull$(EXESUF)
 gcov-files-check-qnull-y = qobject/qnull.c
+check-unit-y += tests/check-qobject$(EXESUF)
 check-unit-y += tests/check-qjson$(EXESUF)
 gcov-files-check-qjson-y = qobject/qjson.c
 check-unit-y += tests/test-qobject-output-visitor$(EXESUF)
@@ -507,7 +508,7 @@ GENERATED_FILES += tests/test-qapi-types.h tests/test-qapi-visit.h \
 	tests/test-qmp-introspect.h
 
 test-obj-y = tests/check-qnum.o tests/check-qstring.o tests/check-qdict.o \
-	tests/check-qlist.o tests/check-qnull.o \
+	tests/check-qlist.o tests/check-qnull.o tests/check-qobject.o \
 	tests/check-qjson.o \
 	tests/test-coroutine.o tests/test-string-output-visitor.o \
 	tests/test-string-input-visitor.o tests/test-qobject-output-visitor.o \
@@ -540,6 +541,7 @@ tests/check-qstring$(EXESUF): tests/check-qstring.o $(test-util-obj-y)
 tests/check-qdict$(EXESUF): tests/check-qdict.o $(test-util-obj-y)
 tests/check-qlist$(EXESUF): tests/check-qlist.o $(test-util-obj-y)
 tests/check-qnull$(EXESUF): tests/check-qnull.o $(test-util-obj-y)
+tests/check-qobject$(EXESUF): tests/check-qobject.o $(test-util-obj-y)
 tests/check-qjson$(EXESUF): tests/check-qjson.o $(test-util-obj-y)
 tests/check-qom-interface$(EXESUF): tests/check-qom-interface.o $(test-qom-obj-y)
 tests/check-qom-proplist$(EXESUF): tests/check-qom-proplist.o $(test-qom-obj-y)
diff --git a/tests/check-qobject.c b/tests/check-qobject.c
new file mode 100644
index 0000000..a68cb1e
--- /dev/null
+++ b/tests/check-qobject.c
@@ -0,0 +1,312 @@
+/*
+ * Generic QObject unit-tests.
+ *
+ * Copyright (C) 2017 Red Hat Inc.
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+#include "qemu/osdep.h"
+
+#include "qapi/qmp/types.h"
+#include "qemu-common.h"
+
+/* Marks the end of the test_equality() argument list.
+ * We cannot use NULL there because that is a valid argument. */
+static QObject _test_equality_end_of_arguments;
+
+/**
+ * Test whether all variadic QObject *arguments are equal (@expected
+ * is true) or whether they are all not equal (@expected is false).
+ * Every QObject is tested to be equal to itself (to test
+ * reflexivity), all tests are done both ways (to test symmetry), and
+ * transitivity is not assumed but checked (each object is compared to
+ * every other one).
+ *
+ * Note that qobject_is_equal() is not really an equivalence relation,
+ * so this function may not be used for all objects (reflexivity is
+ * not guaranteed).
+ */
+static void do_test_equality(bool expected, ...)
+{
+    va_list ap_count, ap_extract;
+    QObject **args;
+    int arg_count = 0;
+    int i, j;
+
+    va_start(ap_count, expected);
+    va_copy(ap_extract, ap_count);
+    while (va_arg(ap_count, QObject *) != &_test_equality_end_of_arguments) {
+        arg_count++;
+    }
+    va_end(ap_count);
+
+    args = g_new(QObject *, arg_count);
+    for (i = 0; i < arg_count; i++) {
+        args[i] = va_arg(ap_extract, QObject *);
+    }
+    va_end(ap_extract);
+
+    for (i = 0; i < arg_count; i++) {
+        g_assert(qobject_is_equal(args[i], args[i]) == true);
+
+        for (j = i + 1; j < arg_count; j++) {
+            g_assert(qobject_is_equal(args[i], args[j]) == expected);
+        }
+    }
+}
+
+#define test_equality(expected, ...) \
+    do_test_equality(expected, __VA_ARGS__, &_test_equality_end_of_arguments)
+
+static void do_free_all(int _, ...)
+{
+    va_list ap;
+    QObject *obj;
+
+    va_start(ap, _);
+    while ((obj = va_arg(ap, QObject *)) != NULL) {
+        qobject_decref(obj);
+    }
+    va_end(ap);
+}
+
+#define free_all(...) \
+    do_free_all(0, __VA_ARGS__, NULL)
+
+static void qobject_is_equal_null_test(void)
+{
+    test_equality(false, qnull(), NULL);
+}
+
+static void qobject_is_equal_num_test(void)
+{
+    QNum *u0, *i0, *d0, *d0p25, *dnan, *um42, *im42, *dm42;
+    QString *s0, *s_empty;
+    QBool *bfalse;
+
+    u0 = qnum_from_uint(0u);
+    i0 = qnum_from_int(0);
+    d0 = qnum_from_double(0.0);
+    d0p25 = qnum_from_double(0.25);
+    dnan = qnum_from_double(0.0 / 0.0);
+    um42 = qnum_from_uint((uint64_t)-42);
+    im42 = qnum_from_int(-42);
+    dm42 = qnum_from_int(-42.0);
+
+    s0 = qstring_from_str("0");
+    s_empty = qstring_new();
+    bfalse = qbool_from_bool(false);
+
+    /* The internal representation should not matter, as long as the
+     * precision is sufficient */
+    test_equality(true, u0, i0, d0);
+
+    /* No automatic type conversion */
+    test_equality(false, u0, s0, s_empty, bfalse, qnull(), NULL);
+    test_equality(false, i0, s0, s_empty, bfalse, qnull(), NULL);
+    test_equality(false, d0, s0, s_empty, bfalse, qnull(), NULL);
+
+    /* Do not round */
+    test_equality(false, u0, d0p25);
+    test_equality(false, i0, d0p25);
+
+    /* Do not assume any object is equal to itself */
+    g_assert(qobject_is_equal(QOBJECT(dnan), QOBJECT(dnan)) == false);
+
+    /* No unsigned overflow */
+    test_equality(false, um42, im42);
+    test_equality(false, um42, dm42);
+    test_equality(true, im42, dm42);
+
+    free_all(u0, i0, d0, d0p25, dnan, um42, im42, dm42, s0, s_empty, bfalse);
+}
+
+static void qobject_is_equal_bool_test(void)
+{
+    QBool *btrue_0, *btrue_1, *bfalse_0, *bfalse_1;
+
+    /* Automatic type conversion is tested in the QNum test */
+
+    btrue_0 = qbool_from_bool(true);
+    btrue_1 = qbool_from_bool(true);
+    bfalse_0 = qbool_from_bool(false);
+    bfalse_1 = qbool_from_bool(false);
+
+    test_equality(true, btrue_0, btrue_1);
+    test_equality(true, bfalse_0, bfalse_1);
+    test_equality(false, btrue_0, bfalse_0);
+    test_equality(false, btrue_1, bfalse_1);
+
+    free_all(btrue_0, btrue_1, bfalse_0, bfalse_1);
+}
+
+static void qobject_is_equal_string_test(void)
+{
+    QString *str_base, *str_whitespace_0, *str_whitespace_1, *str_whitespace_2;
+    QString *str_whitespace_3, *str_case, *str_built;
+
+    str_base = qstring_from_str("foo");
+    str_whitespace_0 = qstring_from_str(" foo");
+    str_whitespace_1 = qstring_from_str("foo ");
+    str_whitespace_2 = qstring_from_str("foo\b");
+    str_whitespace_3 = qstring_from_str("fooo\b");
+    str_case = qstring_from_str("Foo");
+
+    /* Should yield "foo" */
+    str_built = qstring_from_substr("form", 0, 1);
+    qstring_append_chr(str_built, 'o');
+
+    test_equality(false, str_base, str_whitespace_0, str_whitespace_1,
+                         str_whitespace_2, str_whitespace_3, str_case);
+
+    test_equality(true, str_base, str_built);
+
+    free_all(str_base, str_whitespace_0, str_whitespace_1, str_whitespace_2,
+             str_whitespace_3, str_case, str_built);
+}
+
+static void qobject_is_equal_list_test(void)
+{
+    QList *list_0, *list_1, *list_cloned;
+    QList *list_reordered, *list_longer, *list_shorter;
+
+    list_0 = qlist_new();
+    list_1 = qlist_new();
+    list_reordered = qlist_new();
+    list_longer = qlist_new();
+    list_shorter = qlist_new();
+
+    qlist_append_int(list_0, 1);
+    qlist_append_int(list_0, 2);
+    qlist_append_int(list_0, 3);
+
+    qlist_append_int(list_1, 1);
+    qlist_append_int(list_1, 2);
+    qlist_append_int(list_1, 3);
+
+    qlist_append_int(list_reordered, 1);
+    qlist_append_int(list_reordered, 3);
+    qlist_append_int(list_reordered, 2);
+
+    qlist_append_int(list_longer, 1);
+    qlist_append_int(list_longer, 2);
+    qlist_append_int(list_longer, 3);
+    qlist_append_obj(list_longer, qnull());
+
+    qlist_append_int(list_shorter, 1);
+    qlist_append_int(list_shorter, 2);
+
+    list_cloned = qlist_copy(list_0);
+
+    test_equality(true, list_0, list_1, list_cloned);
+    test_equality(false, list_0, list_reordered, list_longer, list_shorter);
+
+    /* With a NaN in it, the list should no longer compare equal to
+     * itself */
+    qlist_append(list_0, qnum_from_double(0.0 / 0.0));
+    g_assert(qobject_is_equal(QOBJECT(list_0), QOBJECT(list_0)) == false);
+
+    free_all(list_0, list_1, list_cloned, list_reordered, list_longer, list_shorter);
+}
+
+static void qobject_is_equal_dict_test(void)
+{
+    Error *local_err = NULL;
+    QDict *dict_0, *dict_1, *dict_cloned;
+    QDict *dict_different_key, *dict_different_value, *dict_different_null_key;
+    QDict *dict_longer, *dict_shorter, *dict_nested;
+    QDict *dict_crumpled;
+
+    dict_0 = qdict_new();
+    dict_1 = qdict_new();
+    dict_different_key = qdict_new();
+    dict_different_value = qdict_new();
+    dict_different_null_key = qdict_new();
+    dict_longer = qdict_new();
+    dict_shorter = qdict_new();
+    dict_nested = qdict_new();
+
+    qdict_put_int(dict_0, "f.o", 1);
+    qdict_put_int(dict_0, "bar", 2);
+    qdict_put_int(dict_0, "baz", 3);
+    qdict_put_obj(dict_0, "null", qnull());
+
+    qdict_put_int(dict_1, "f.o", 1);
+    qdict_put_int(dict_1, "bar", 2);
+    qdict_put_int(dict_1, "baz", 3);
+    qdict_put_obj(dict_1, "null", qnull());
+
+    qdict_put_int(dict_different_key, "F.o", 1);
+    qdict_put_int(dict_different_key, "bar", 2);
+    qdict_put_int(dict_different_key, "baz", 3);
+    qdict_put_obj(dict_different_key, "null", qnull());
+
+    qdict_put_int(dict_different_value, "f.o", 42);
+    qdict_put_int(dict_different_value, "bar", 2);
+    qdict_put_int(dict_different_value, "baz", 3);
+    qdict_put_obj(dict_different_value, "null", qnull());
+
+    qdict_put_int(dict_different_null_key, "f.o", 1);
+    qdict_put_int(dict_different_null_key, "bar", 2);
+    qdict_put_int(dict_different_null_key, "baz", 3);
+    qdict_put_obj(dict_different_null_key, "none", qnull());
+
+    qdict_put_int(dict_longer, "f.o", 1);
+    qdict_put_int(dict_longer, "bar", 2);
+    qdict_put_int(dict_longer, "baz", 3);
+    qdict_put_int(dict_longer, "xyz", 4);
+    qdict_put_obj(dict_longer, "null", qnull());
+
+    qdict_put_int(dict_shorter, "f.o", 1);
+    qdict_put_int(dict_shorter, "bar", 2);
+    qdict_put_int(dict_shorter, "baz", 3);
+
+    qdict_put(dict_nested, "f", qdict_new());
+    qdict_put_int(qdict_get_qdict(dict_nested, "f"), "o", 1);
+    qdict_put_int(dict_nested, "bar", 2);
+    qdict_put_int(dict_nested, "baz", 3);
+    qdict_put_obj(dict_nested, "null", qnull());
+
+    dict_cloned = qdict_clone_shallow(dict_0);
+
+    test_equality(true, dict_0, dict_1, dict_cloned);
+    test_equality(false, dict_0, dict_different_key, dict_different_value,
+                         dict_different_null_key, dict_longer, dict_shorter,
+                         dict_nested);
+
+    dict_crumpled = qobject_to_qdict(qdict_crumple(dict_1, &local_err));
+    g_assert(!local_err);
+    test_equality(true, dict_crumpled, dict_nested);
+
+    qdict_flatten(dict_nested);
+    test_equality(true, dict_0, dict_nested);
+
+    /* Containing an NaN value will make this dict compare unequal to
+     * itself */
+    qdict_put(dict_0, "NaN", qnum_from_double(0.0 / 0.0));
+    g_assert(qobject_is_equal(QOBJECT(dict_0), QOBJECT(dict_0)) == false);
+
+    free_all(dict_0, dict_1, dict_cloned, dict_different_key,
+             dict_different_value, dict_different_null_key, dict_longer,
+             dict_shorter, dict_nested, dict_crumpled);
+}
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+
+    g_test_add_func("/public/qobject_is_equal_null",
+                    qobject_is_equal_null_test);
+    g_test_add_func("/public/qobject_is_equal_num", qobject_is_equal_num_test);
+    g_test_add_func("/public/qobject_is_equal_bool",
+                    qobject_is_equal_bool_test);
+    g_test_add_func("/public/qobject_is_equal_string",
+                    qobject_is_equal_string_test);
+    g_test_add_func("/public/qobject_is_equal_list",
+                    qobject_is_equal_list_test);
+    g_test_add_func("/public/qobject_is_equal_dict",
+                    qobject_is_equal_dict_test);
+
+    return g_test_run();
+}
-- 
2.9.4