tests: add AioContext unit tests

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

2 files changed, 669 insertions, 0 deletions

diff --git a/tests/Makefile b/tests/Makefile
index ca680e5644..61cbe3b5fa 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -15,6 +15,7 @@ check-unit-y += tests/test-string-output-visitor$(EXESUF)
 check-unit-y += tests/test-coroutine$(EXESUF)
 check-unit-y += tests/test-visitor-serialization$(EXESUF)
 check-unit-y += tests/test-iov$(EXESUF)
+check-unit-y += tests/test-aio$(EXESUF)
 
 check-block-$(CONFIG_POSIX) += tests/qemu-iotests-quick.sh
 
@@ -49,6 +50,7 @@ tests/check-qlist$(EXESUF): tests/check-qlist.o qlist.o qint.o
 tests/check-qfloat$(EXESUF): tests/check-qfloat.o qfloat.o
 tests/check-qjson$(EXESUF): tests/check-qjson.o $(qobject-obj-y) qemu-tool.o
 tests/test-coroutine$(EXESUF): tests/test-coroutine.o $(coroutine-obj-y) $(tools-obj-y) $(block-obj-y) iov.o libqemustub.a
+tests/test-aio$(EXESUF): tests/test-aio.o $(coroutine-obj-y) $(tools-obj-y) $(block-obj-y) libqemustub.a
 tests/test-iov$(EXESUF): tests/test-iov.o iov.o
 
 tests/test-qapi-types.c tests/test-qapi-types.h :\
diff --git a/tests/test-aio.c b/tests/test-aio.c
new file mode 100644
index 0000000000..f53c908707
--- /dev/null
+++ b/tests/test-aio.c
@@ -0,0 +1,667 @@
+/*
+ * AioContext tests
+ *
+ * Copyright Red Hat, Inc. 2012
+ *
+ * Authors:
+ *  Paolo Bonzini    <pbonzini@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#include <glib.h>
+#include "qemu-aio.h"
+
+AioContext *ctx;
+
+/* Simple callbacks for testing.  */
+
+typedef struct {
+    QEMUBH *bh;
+    int n;
+    int max;
+} BHTestData;
+
+static void bh_test_cb(void *opaque)
+{
+    BHTestData *data = opaque;
+    if (++data->n < data->max) {
+        qemu_bh_schedule(data->bh);
+    }
+}
+
+static void bh_delete_cb(void *opaque)
+{
+    BHTestData *data = opaque;
+    if (++data->n < data->max) {
+        qemu_bh_schedule(data->bh);
+    } else {
+        qemu_bh_delete(data->bh);
+        data->bh = NULL;
+    }
+}
+
+typedef struct {
+    EventNotifier e;
+    int n;
+    int active;
+    bool auto_set;
+} EventNotifierTestData;
+
+static int event_active_cb(EventNotifier *e)
+{
+    EventNotifierTestData *data = container_of(e, EventNotifierTestData, e);
+    return data->active > 0;
+}
+
+static void event_ready_cb(EventNotifier *e)
+{
+    EventNotifierTestData *data = container_of(e, EventNotifierTestData, e);
+    g_assert(event_notifier_test_and_clear(e));
+    data->n++;
+    if (data->active > 0) {
+        data->active--;
+    }
+    if (data->auto_set && data->active) {
+        event_notifier_set(e);
+    }
+}
+
+/* Tests using aio_*.  */
+
+static void test_notify(void)
+{
+    g_assert(!aio_poll(ctx, false));
+    aio_notify(ctx);
+    g_assert(!aio_poll(ctx, true));
+    g_assert(!aio_poll(ctx, false));
+}
+
+static void test_flush(void)
+{
+    g_assert(!aio_poll(ctx, false));
+    aio_notify(ctx);
+    aio_flush(ctx);
+    g_assert(!aio_poll(ctx, false));
+}
+
+static void test_bh_schedule(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(aio_poll(ctx, true));
+    g_assert_cmpint(data.n, ==, 1);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_bh_schedule10(void)
+{
+    BHTestData data = { .n = 0, .max = 10 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+
+    g_assert(aio_poll(ctx, true));
+    g_assert_cmpint(data.n, ==, 2);
+
+    aio_flush(ctx);
+    g_assert_cmpint(data.n, ==, 10);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 10);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_bh_cancel(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    qemu_bh_cancel(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_bh_delete(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    qemu_bh_delete(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+}
+
+static void test_bh_delete_from_cb(void)
+{
+    BHTestData data1 = { .n = 0, .max = 1 };
+
+    data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
+
+    qemu_bh_schedule(data1.bh);
+    g_assert_cmpint(data1.n, ==, 0);
+
+    aio_flush(ctx);
+    g_assert_cmpint(data1.n, ==, data1.max);
+    g_assert(data1.bh == NULL);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert(!aio_poll(ctx, true));
+}
+
+static void test_bh_delete_from_cb_many(void)
+{
+    BHTestData data1 = { .n = 0, .max = 1 };
+    BHTestData data2 = { .n = 0, .max = 3 };
+    BHTestData data3 = { .n = 0, .max = 2 };
+    BHTestData data4 = { .n = 0, .max = 4 };
+
+    data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
+    data2.bh = aio_bh_new(ctx, bh_delete_cb, &data2);
+    data3.bh = aio_bh_new(ctx, bh_delete_cb, &data3);
+    data4.bh = aio_bh_new(ctx, bh_delete_cb, &data4);
+
+    qemu_bh_schedule(data1.bh);
+    qemu_bh_schedule(data2.bh);
+    qemu_bh_schedule(data3.bh);
+    qemu_bh_schedule(data4.bh);
+    g_assert_cmpint(data1.n, ==, 0);
+    g_assert_cmpint(data2.n, ==, 0);
+    g_assert_cmpint(data3.n, ==, 0);
+    g_assert_cmpint(data4.n, ==, 0);
+
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data1.n, ==, 1);
+    g_assert_cmpint(data2.n, ==, 1);
+    g_assert_cmpint(data3.n, ==, 1);
+    g_assert_cmpint(data4.n, ==, 1);
+    g_assert(data1.bh == NULL);
+
+    aio_flush(ctx);
+    g_assert_cmpint(data1.n, ==, data1.max);
+    g_assert_cmpint(data2.n, ==, data2.max);
+    g_assert_cmpint(data3.n, ==, data3.max);
+    g_assert_cmpint(data4.n, ==, data4.max);
+    g_assert(data1.bh == NULL);
+    g_assert(data2.bh == NULL);
+    g_assert(data3.bh == NULL);
+    g_assert(data4.bh == NULL);
+}
+
+static void test_bh_flush(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    aio_flush(ctx);
+    g_assert_cmpint(data.n, ==, 1);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_set_event_notifier(void)
+{
+    EventNotifierTestData data = { .n = 0, .active = 0 };
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, event_active_cb);
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+    event_notifier_cleanup(&data.e);
+}
+
+static void test_wait_event_notifier(void)
+{
+    EventNotifierTestData data = { .n = 0, .active = 1 };
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, event_active_cb);
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+    g_assert_cmpint(data.active, ==, 1);
+
+    event_notifier_set(&data.e);
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert_cmpint(data.active, ==, 0);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert_cmpint(data.active, ==, 0);
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+
+    event_notifier_cleanup(&data.e);
+}
+
+static void test_flush_event_notifier(void)
+{
+    EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, event_active_cb);
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+    g_assert_cmpint(data.active, ==, 10);
+
+    event_notifier_set(&data.e);
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert_cmpint(data.active, ==, 9);
+    g_assert(aio_poll(ctx, false));
+
+    aio_flush(ctx);
+    g_assert_cmpint(data.n, ==, 10);
+    g_assert_cmpint(data.active, ==, 0);
+    g_assert(!aio_poll(ctx, false));
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    g_assert(!aio_poll(ctx, false));
+    event_notifier_cleanup(&data.e);
+}
+
+static void test_wait_event_notifier_noflush(void)
+{
+    EventNotifierTestData data = { .n = 0 };
+    EventNotifierTestData dummy = { .n = 0, .active = 1 };
+
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, NULL);
+
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 0);
+
+    /* Until there is an active descriptor, aio_poll may or may not call
+     * event_ready_cb.  Still, it must not block.  */
+    event_notifier_set(&data.e);
+    g_assert(!aio_poll(ctx, true));
+    data.n = 0;
+
+    /* An active event notifier forces aio_poll to look at EventNotifiers.  */
+    event_notifier_init(&dummy.e, false);
+    aio_set_event_notifier(ctx, &dummy.e, event_ready_cb, event_active_cb);
+
+    event_notifier_set(&data.e);
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 1);
+
+    event_notifier_set(&data.e);
+    g_assert(aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 2);
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 2);
+
+    event_notifier_set(&dummy.e);
+    aio_flush(ctx);
+    g_assert_cmpint(data.n, ==, 2);
+    g_assert_cmpint(dummy.n, ==, 1);
+    g_assert_cmpint(dummy.active, ==, 0);
+
+    aio_set_event_notifier(ctx, &dummy.e, NULL, NULL);
+    event_notifier_cleanup(&dummy.e);
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    g_assert(!aio_poll(ctx, false));
+    g_assert_cmpint(data.n, ==, 2);
+
+    event_notifier_cleanup(&data.e);
+}
+
+/* Now the same tests, using the context as a GSource.  They are
+ * very similar to the ones above, with g_main_context_iteration
+ * replacing aio_poll.  However:
+ * - sometimes both the AioContext and the glib main loop wake
+ *   themselves up.  Hence, some "g_assert(!aio_poll(ctx, false));"
+ *   are replaced by "while (g_main_context_iteration(NULL, false));".
+ * - there is no exact replacement for aio_flush's blocking wait.
+ *   "while (g_main_context_iteration(NULL, true)" seems to work,
+ *   but it is not documented _why_ it works.  For these tests a
+ *   non-blocking loop like "while (g_main_context_iteration(NULL, false)"
+ *   works well, and that's what I am using.
+ */
+
+static void test_source_notify(void)
+{
+    while (g_main_context_iteration(NULL, false));
+    aio_notify(ctx);
+    g_assert(g_main_context_iteration(NULL, true));
+    g_assert(!g_main_context_iteration(NULL, false));
+}
+
+static void test_source_flush(void)
+{
+    g_assert(!g_main_context_iteration(NULL, false));
+    aio_notify(ctx);
+    while (g_main_context_iteration(NULL, false));
+    g_assert(!g_main_context_iteration(NULL, false));
+}
+
+static void test_source_bh_schedule(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(g_main_context_iteration(NULL, true));
+    g_assert_cmpint(data.n, ==, 1);
+
+    g_assert(!g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_source_bh_schedule10(void)
+{
+    BHTestData data = { .n = 0, .max = 10 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+
+    g_assert(g_main_context_iteration(NULL, true));
+    g_assert_cmpint(data.n, ==, 2);
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 10);
+
+    g_assert(!g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 10);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_source_bh_cancel(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    qemu_bh_cancel(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_source_bh_delete(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    qemu_bh_delete(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+}
+
+static void test_source_bh_delete_from_cb(void)
+{
+    BHTestData data1 = { .n = 0, .max = 1 };
+
+    data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
+
+    qemu_bh_schedule(data1.bh);
+    g_assert_cmpint(data1.n, ==, 0);
+
+    g_main_context_iteration(NULL, true);
+    g_assert_cmpint(data1.n, ==, data1.max);
+    g_assert(data1.bh == NULL);
+
+    g_assert(!g_main_context_iteration(NULL, false));
+}
+
+static void test_source_bh_delete_from_cb_many(void)
+{
+    BHTestData data1 = { .n = 0, .max = 1 };
+    BHTestData data2 = { .n = 0, .max = 3 };
+    BHTestData data3 = { .n = 0, .max = 2 };
+    BHTestData data4 = { .n = 0, .max = 4 };
+
+    data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
+    data2.bh = aio_bh_new(ctx, bh_delete_cb, &data2);
+    data3.bh = aio_bh_new(ctx, bh_delete_cb, &data3);
+    data4.bh = aio_bh_new(ctx, bh_delete_cb, &data4);
+
+    qemu_bh_schedule(data1.bh);
+    qemu_bh_schedule(data2.bh);
+    qemu_bh_schedule(data3.bh);
+    qemu_bh_schedule(data4.bh);
+    g_assert_cmpint(data1.n, ==, 0);
+    g_assert_cmpint(data2.n, ==, 0);
+    g_assert_cmpint(data3.n, ==, 0);
+    g_assert_cmpint(data4.n, ==, 0);
+
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data1.n, ==, 1);
+    g_assert_cmpint(data2.n, ==, 1);
+    g_assert_cmpint(data3.n, ==, 1);
+    g_assert_cmpint(data4.n, ==, 1);
+    g_assert(data1.bh == NULL);
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data1.n, ==, data1.max);
+    g_assert_cmpint(data2.n, ==, data2.max);
+    g_assert_cmpint(data3.n, ==, data3.max);
+    g_assert_cmpint(data4.n, ==, data4.max);
+    g_assert(data1.bh == NULL);
+    g_assert(data2.bh == NULL);
+    g_assert(data3.bh == NULL);
+    g_assert(data4.bh == NULL);
+}
+
+static void test_source_bh_flush(void)
+{
+    BHTestData data = { .n = 0 };
+    data.bh = aio_bh_new(ctx, bh_test_cb, &data);
+
+    qemu_bh_schedule(data.bh);
+    g_assert_cmpint(data.n, ==, 0);
+
+    g_assert(g_main_context_iteration(NULL, true));
+    g_assert_cmpint(data.n, ==, 1);
+
+    g_assert(!g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+    qemu_bh_delete(data.bh);
+}
+
+static void test_source_set_event_notifier(void)
+{
+    EventNotifierTestData data = { .n = 0, .active = 0 };
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, event_active_cb);
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+    event_notifier_cleanup(&data.e);
+}
+
+static void test_source_wait_event_notifier(void)
+{
+    EventNotifierTestData data = { .n = 0, .active = 1 };
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, event_active_cb);
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+    g_assert_cmpint(data.active, ==, 1);
+
+    event_notifier_set(&data.e);
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert_cmpint(data.active, ==, 0);
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert_cmpint(data.active, ==, 0);
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+
+    event_notifier_cleanup(&data.e);
+}
+
+static void test_source_flush_event_notifier(void)
+{
+    EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, event_active_cb);
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+    g_assert_cmpint(data.active, ==, 10);
+
+    event_notifier_set(&data.e);
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert_cmpint(data.active, ==, 9);
+    g_assert(g_main_context_iteration(NULL, false));
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 10);
+    g_assert_cmpint(data.active, ==, 0);
+    g_assert(!g_main_context_iteration(NULL, false));
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    while (g_main_context_iteration(NULL, false));
+    event_notifier_cleanup(&data.e);
+}
+
+static void test_source_wait_event_notifier_noflush(void)
+{
+    EventNotifierTestData data = { .n = 0 };
+    EventNotifierTestData dummy = { .n = 0, .active = 1 };
+
+    event_notifier_init(&data.e, false);
+    aio_set_event_notifier(ctx, &data.e, event_ready_cb, NULL);
+
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 0);
+
+    /* Until there is an active descriptor, glib may or may not call
+     * event_ready_cb.  Still, it must not block.  */
+    event_notifier_set(&data.e);
+    g_main_context_iteration(NULL, true);
+    data.n = 0;
+
+    /* An active event notifier forces aio_poll to look at EventNotifiers.  */
+    event_notifier_init(&dummy.e, false);
+    aio_set_event_notifier(ctx, &dummy.e, event_ready_cb, event_active_cb);
+
+    event_notifier_set(&data.e);
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+    g_assert(!g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 1);
+
+    event_notifier_set(&data.e);
+    g_assert(g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 2);
+    g_assert(!g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 2);
+
+    event_notifier_set(&dummy.e);
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 2);
+    g_assert_cmpint(dummy.n, ==, 1);
+    g_assert_cmpint(dummy.active, ==, 0);
+
+    aio_set_event_notifier(ctx, &dummy.e, NULL, NULL);
+    event_notifier_cleanup(&dummy.e);
+
+    aio_set_event_notifier(ctx, &data.e, NULL, NULL);
+    while (g_main_context_iteration(NULL, false));
+    g_assert_cmpint(data.n, ==, 2);
+
+    event_notifier_cleanup(&data.e);
+}
+
+/* End of tests.  */
+
+int main(int argc, char **argv)
+{
+    GSource *src;
+
+    ctx = aio_context_new();
+    src = aio_get_g_source(ctx);
+    g_source_attach(src, NULL);
+    g_source_unref(src);
+
+    while (g_main_context_iteration(NULL, false));
+
+    g_test_init(&argc, &argv, NULL);
+    g_test_add_func("/aio/notify",                  test_notify);
+    g_test_add_func("/aio/flush",                   test_flush);
+    g_test_add_func("/aio/bh/schedule",             test_bh_schedule);
+    g_test_add_func("/aio/bh/schedule10",           test_bh_schedule10);
+    g_test_add_func("/aio/bh/cancel",               test_bh_cancel);
+    g_test_add_func("/aio/bh/delete",               test_bh_delete);
+    g_test_add_func("/aio/bh/callback-delete/one",  test_bh_delete_from_cb);
+    g_test_add_func("/aio/bh/callback-delete/many", test_bh_delete_from_cb_many);
+    g_test_add_func("/aio/bh/flush",                test_bh_flush);
+    g_test_add_func("/aio/event/add-remove",        test_set_event_notifier);
+    g_test_add_func("/aio/event/wait",              test_wait_event_notifier);
+    g_test_add_func("/aio/event/wait/no-flush-cb",  test_wait_event_notifier_noflush);
+    g_test_add_func("/aio/event/flush",             test_flush_event_notifier);
+
+    g_test_add_func("/aio-gsource/notify",                  test_source_notify);
+    g_test_add_func("/aio-gsource/flush",                   test_source_flush);
+    g_test_add_func("/aio-gsource/bh/schedule",             test_source_bh_schedule);
+    g_test_add_func("/aio-gsource/bh/schedule10",           test_source_bh_schedule10);
+    g_test_add_func("/aio-gsource/bh/cancel",               test_source_bh_cancel);
+    g_test_add_func("/aio-gsource/bh/delete",               test_source_bh_delete);
+    g_test_add_func("/aio-gsource/bh/callback-delete/one",  test_source_bh_delete_from_cb);
+    g_test_add_func("/aio-gsource/bh/callback-delete/many", test_source_bh_delete_from_cb_many);
+    g_test_add_func("/aio-gsource/bh/flush",                test_source_bh_flush);
+    g_test_add_func("/aio-gsource/event/add-remove",        test_source_set_event_notifier);
+    g_test_add_func("/aio-gsource/event/wait",              test_source_wait_event_notifier);
+    g_test_add_func("/aio-gsource/event/wait/no-flush-cb",  test_source_wait_event_notifier_noflush);
+    g_test_add_func("/aio-gsource/event/flush",             test_source_flush_event_notifier);
+    return g_test_run();
+}