1 files changed, 124 insertions, 0 deletions
diff --git a/test/test_update.c b/test/test_update.c
new file mode 100644
index 0000000..bbda94a
--- /dev/null
+++ b/test/test_update.c
@@ -0,0 +1,124 @@
+/*
+  Copyright 2020 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, 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.
+*/
+
+/*
+  Tests that redisplays posted in the event handler are dispatched at the end
+  of the same event loop iteration.
+*/
+
+#undef NDEBUG
+
+#include "test_utils.h"
+
+#include "pugl/pugl.h"
+#include "pugl/pugl_stub.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#ifdef __APPLE__
+static const double timeout = 1 / 60.0;
+#else
+static const double timeout = -1.0;
+#endif
+
+typedef enum {
+	START,
+	EXPOSED1,
+	UPDATED,
+	EXPOSED2,
+} State;
+
+typedef struct {
+	PuglTestOptions opts;
+	PuglWorld*      world;
+	PuglView*       view;
+	State           state;
+} PuglTest;
+
+static PuglStatus
+onEvent(PuglView* view, const PuglEvent* event)
+{
+	PuglTest* test = (PuglTest*)puglGetHandle(view);
+
+	if (test->opts.verbose) {
+		printEvent(event, "Event: ", true);
+	}
+
+	switch (event->type) {
+	case PUGL_EXPOSE:
+		switch (test->state) {
+		case START:
+			test->state = EXPOSED1;
+			break;
+		case UPDATED:
+			test->state = EXPOSED2;
+			break;
+		default:
+			break;
+		}
+		break;
+
+	case PUGL_UPDATE:
+		if (test->state == EXPOSED1) {
+			puglPostRedisplay(view);
+			test->state = UPDATED;
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return PUGL_SUCCESS;
+}
+
+int
+main(int argc, char** argv)
+{
+	PuglTest app = {puglParseTestOptions(&argc, &argv),
+	                puglNewWorld(PUGL_PROGRAM, 0),
+	                NULL,
+	                START};
+
+	// Set up view
+	app.view = puglNewView(app.world);
+	puglSetClassName(app.world, "Pugl Test");
+	puglSetBackend(app.view, puglStubBackend());
+	puglSetHandle(app.view, &app);
+	puglSetEventFunc(app.view, onEvent);
+
+	// Create and show window
+	assert(!puglCreateWindow(app.view, "Pugl Test"));
+	assert(!puglShowWindow(app.view));
+
+	// Tick until an expose happens
+	while (app.state <= EXPOSED1) {
+		assert(!puglUpdate(app.world, timeout));
+		assert(app.state != UPDATED);
+	}
+
+	// Tick once and ensure the update and the expose it posted both happened
+	assert(!puglUpdate(app.world, 0.0));
+	assert(app.state == EXPOSED2);
+
+	// Tear down
+	puglFreeView(app.view);
+	puglFreeWorld(app.world);
+
+	return 0;
+}