tests: Add event-test, which tests for a few incoming events

We check that we get surface.enter_output and move the pointer into
the window and make sure we get input_device.pointer_enter with
the right coordinates.

There's a lot of code for a very simple test here, so we need to
figure out how to reuse most of the event handling and such.  It's also
not clear that a custom, text based protocol is practical here, we might
just use a wayland extension after all.
diff --git a/tests/event-test.c b/tests/event-test.c
new file mode 100644
index 0000000..737e227
--- /dev/null
+++ b/tests/event-test.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <assert.h>
+#include <unistd.h>
+
+#include <string.h>
+
+#include "test-runner.h"
+
+static void
+handle_surface(struct test_client *client)
+{
+	uint32_t id;
+	struct wl_resource *resource;
+	struct weston_surface *surface;
+	struct weston_layer *layer = client->data;
+	struct wl_input_device *device;
+
+	assert(sscanf(client->buf, "surface %u", &id) == 1);
+	fprintf(stderr, "got surface id %u\n", id);
+	resource = wl_client_get_object(client->client, id);
+	assert(resource);
+	assert(strcmp(resource->object.interface->name, "wl_surface") == 0);
+
+	surface = (struct weston_surface *) resource;
+
+	weston_surface_configure(surface, 100, 100, 200, 200);
+	weston_surface_assign_output(surface);
+	weston_surface_set_color(surface, 0.0, 0.0, 0.0, 1.0);
+	wl_list_insert(&layer->surface_list, &surface->layer_link);
+	weston_surface_damage(surface);
+
+	device = client->compositor->input_device;
+	client->compositor->focus = 1; /* Make it work even if pointer is
+					* outside X window. */
+	notify_motion(device, 100, 150, 150);
+
+	test_client_send(client, "bye\n");
+}
+
+TEST(event_test)
+{
+	struct test_client *client;
+	struct weston_layer *layer;
+
+	client = test_client_launch(compositor);
+	client->terminate = 1;
+
+	test_client_send(client, "create-surface\n");
+	client->handle = handle_surface;
+
+	layer = malloc(sizeof *layer);
+	assert(layer);
+	weston_layer_init(layer, &compositor->cursor_layer.link);
+	client->data = layer;
+}