[PATCH 2/3] tests: add unit tests for wl_signal

[Marek Ch]

Test wl_signal initialization, adding and getting listeners and emitting
---
 tests/Makefile.am   |   4 +-
 tests/signal-test.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+), 1 deletion(-)
 create mode 100644 tests/signal-test.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 54157bc..3806cb6 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -10,7 +10,8 @@ TESTS =						\
 	os-wrappers-test			\
 	sanity-test				\
 	socket-test				\
-	queue-test
+	queue-test				\
+	signal-test
 
 check_PROGRAMS =				\
 	$(TESTS)				\
@@ -32,6 +33,7 @@ map_test_SOURCES = map-test.c $(test_runner_src)
 sanity_test_SOURCES = sanity-test.c $(test_runner_src)
 socket_test_SOURCES = socket-test.c $(test_runner_src)
 queue_test_SOURCES = queue-test.c $(test_runner_src)
+signal_test_SOURCES = signal-test.c $(test_runner_src)
 
 fixed_benchmark_SOURCES = fixed-benchmark.c
 
diff --git a/tests/signal-test.c b/tests/signal-test.c
new file mode 100644
index 0000000..db83abc
--- /dev/null
+++ b/tests/signal-test.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright © 2013 Marek Chalupa
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <assert.h>
+
+#include "wayland-server.h"
+#include "test-runner.h"
+
+static void
+signal_notify(struct wl_listener *listener, void *data)
+{
+	/* only increase counter*/
+	++(*((int *) data));
+}
+
+TEST(signal_init)
+{
+	struct wl_signal signal;
+
+	wl_signal_init(&signal);
+
+	/* Test if listeners' list is initialized */
+	assert(&signal.listener_list == signal.listener_list.next
+		&& "Maybe wl_signal implementation changed?");
+	assert(signal.listener_list.next == signal.listener_list.prev
+		&& "Maybe wl_signal implementation changed?");
+}
+
+TEST(signal_add_get)
+{
+	struct wl_signal signal;
+
+	/* we just need different values of notify */
+	struct wl_listener l1 = {.notify = (wl_notify_func_t) 0x1};
+	struct wl_listener l2 = {.notify = (wl_notify_func_t) 0x2};
+	struct wl_listener l3 = {.notify = (wl_notify_func_t) 0x3};
+	/* one real, why not */
+	struct wl_listener l4 = {.notify = signal_notify};
+
+	wl_signal_init(&signal);
+
+	wl_signal_add(&signal, &l1);
+	wl_signal_add(&signal, &l2);
+	wl_signal_add(&signal, &l3);
+	wl_signal_add(&signal, &l4);
+
+	assert(wl_signal_get(&signal, signal_notify) == &l4);
+	assert(wl_signal_get(&signal, (wl_notify_func_t) 0x3) == &l3);
+	assert(wl_signal_get(&signal, (wl_notify_func_t) 0x2) == &l2);
+	assert(wl_signal_get(&signal, (wl_notify_func_t) 0x1) == &l1);
+
+	/* get should not be destructive */
+	assert(wl_signal_get(&signal, signal_notify) == &l4);
+	assert(wl_signal_get(&signal, (wl_notify_func_t) 0x3) == &l3);
+	assert(wl_signal_get(&signal, (wl_notify_func_t) 0x2) == &l2);
+	assert(wl_signal_get(&signal, (wl_notify_func_t) 0x1) == &l1);
+}
+
+TEST(signal_emit_to_one_listener)
+{
+	int count = 0;
+	int counter;
+
+	struct wl_signal signal;
+	struct wl_listener l1 = {.notify = signal_notify};
+
+	wl_signal_init(&signal);
+	wl_signal_add(&signal, &l1);
+
+	for (counter = 0; counter < 100; counter++)
+		wl_signal_emit(&signal, &count);
+
+	assert(counter == count);
+}
+
+TEST(signal_emit_to_more_listeners)
+{
+	int count = 0;
+	int counter;
+
+	struct wl_signal signal;
+	struct wl_listener l1 = {.notify = signal_notify};
+	struct wl_listener l2 = {.notify = signal_notify};
+	struct wl_listener l3 = {.notify = signal_notify};
+
+	wl_signal_init(&signal);
+	wl_signal_add(&signal, &l1);
+	wl_signal_add(&signal, &l2);
+	wl_signal_add(&signal, &l3);
+
+	for (counter = 0; counter < 100; counter++)
+		wl_signal_emit(&signal, &count);
+
+	assert(3 * counter == count);
+}
-- 
1.8.3.1