--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-drawable.c	Wed Oct 14 14:52:26 2020 +0200
@@ -0,0 +1,319 @@
+/*
+ * test-action.c -- test actions
+ *
+ * Copyright (c) 2020 David Demelier <markand@malikania.fr>
+ *
+ * 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.
+ *
+ * THE 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.
+ */
+
+#define GREATEST_USE_ABBREVS 0
+#include <greatest.h>
+
+#include <core/drawable.h>
+#include <core/event.h>
+
+struct invokes {
+	bool update;
+	bool draw;
+	bool end;
+	bool finish;
+};
+
+#define INIT(dat, up) {         \
+        .data = (dat),          \
+        .update = (up),         \
+        .draw = my_draw,        \
+        .end = my_end,          \
+        .finish = my_finish     \
+}
+
+static bool
+my_update_false(struct drawable *dw, unsigned int ticks)
+{
+	(void)ticks;
+
+	((struct invokes *)dw->data)->update = true;
+
+	return false;
+}
+
+static bool
+my_update_true(struct drawable *dw, unsigned int ticks)
+{
+	(void)ticks;
+
+	((struct invokes *)dw->data)->update = true;
+
+	return true;
+}
+
+static void
+my_draw(struct drawable *dw)
+{
+	((struct invokes *)dw->data)->draw = true;
+}
+
+static void
+my_end(struct drawable *dw)
+{
+	((struct invokes *)dw->data)->end = true;
+}
+
+static void
+my_finish(struct drawable *dw)
+{
+	((struct invokes *)dw->data)->finish = true;
+}
+
+GREATEST_TEST
+basics_update(void)
+{
+	struct {
+		struct invokes inv;
+		struct drawable dw;
+	} table[] = {
+		{ .dw = INIT(&table[0], my_update_true)        },
+		{ .dw = INIT(&table[1], my_update_false)       }
+	};
+
+	/* True version. */
+	GREATEST_ASSERT(drawable_update(&table[0].dw, 0));
+	GREATEST_ASSERT(table[0].inv.update);
+	GREATEST_ASSERT(!table[0].inv.draw);
+	GREATEST_ASSERT(!table[0].inv.end);
+	GREATEST_ASSERT(!table[0].inv.finish);
+
+	/* False version. */
+	GREATEST_ASSERT(!drawable_update(&table[1].dw, 0));
+	GREATEST_ASSERT(table[1].inv.update);
+	GREATEST_ASSERT(!table[1].inv.draw);
+	GREATEST_ASSERT(!table[1].inv.end);
+	GREATEST_ASSERT(!table[1].inv.finish);
+	
+	GREATEST_PASS();
+}
+
+GREATEST_TEST
+basics_draw(void)
+{
+	struct invokes inv = {0};
+	struct drawable dw = INIT(&inv, my_update_true);
+
+	drawable_draw(&dw);
+
+	GREATEST_ASSERT(!inv.update);
+	GREATEST_ASSERT(inv.draw);
+	GREATEST_ASSERT(!inv.end);
+	GREATEST_ASSERT(!inv.finish);
+	GREATEST_PASS();
+}
+
+GREATEST_TEST
+basics_end(void)
+{
+	struct invokes inv = {0};
+	struct drawable dw = INIT(&inv, my_update_true);
+
+	drawable_end(&dw);
+
+	GREATEST_ASSERT(!inv.update);
+	GREATEST_ASSERT(!inv.draw);
+	GREATEST_ASSERT(inv.end);
+	GREATEST_ASSERT(!inv.finish);
+	GREATEST_PASS();
+}
+
+GREATEST_TEST
+basics_finish(void)
+{
+	struct invokes inv = {0};
+	struct drawable dw = INIT(&inv, my_update_true);
+
+	drawable_finish(&dw);
+
+	GREATEST_ASSERT(!inv.update);
+	GREATEST_ASSERT(!inv.draw);
+	GREATEST_ASSERT(!inv.end);
+	GREATEST_ASSERT(inv.finish);
+	GREATEST_PASS();
+}
+
+GREATEST_SUITE(suite_basics)
+{
+	GREATEST_RUN_TEST(basics_update);
+	GREATEST_RUN_TEST(basics_draw);
+	GREATEST_RUN_TEST(basics_end);
+	GREATEST_RUN_TEST(basics_finish);
+}
+
+GREATEST_TEST
+stack_add(void)
+{
+	struct drawable_stack st = {0};
+	struct drawable dw = {0};
+
+	GREATEST_ASSERT(drawable_stack_add(&st, &dw));
+
+	/* Now fill up. */
+	for (int i = 0; i < DRAWABLE_STACK_MAX - 1; ++i)
+		GREATEST_ASSERT(drawable_stack_add(&st, &dw));
+
+	/* This one should not fit in. */
+	GREATEST_ASSERT(!drawable_stack_add(&st, &dw));
+
+	GREATEST_PASS();
+}
+
+GREATEST_TEST
+stack_update(void)
+{
+	struct {
+		struct invokes inv;
+		struct drawable dw;
+	} table[] = {
+		{ .dw = INIT(&table[0], my_update_false)       },
+		{ .dw = INIT(&table[1], my_update_true)        },
+		{ .dw = INIT(&table[2], my_update_false)       },
+		{ .dw = INIT(&table[3], my_update_false)       },
+		{ .dw = INIT(&table[4], my_update_true)        },
+		{ .dw = INIT(&table[5], my_update_true)        },
+		{ .dw = INIT(&table[6], my_update_false)	},
+	};
+
+	struct drawable_stack st = {0};
+
+	drawable_stack_add(&st, &table[0].dw);
+	drawable_stack_add(&st, &table[1].dw);
+	drawable_stack_add(&st, &table[2].dw);
+	drawable_stack_add(&st, &table[3].dw);
+	drawable_stack_add(&st, &table[4].dw);
+	drawable_stack_add(&st, &table[5].dw);
+	drawable_stack_add(&st, &table[6].dw);
+
+	GREATEST_ASSERT(!drawable_stack_update(&st, 0));
+
+	GREATEST_ASSERT(table[0].inv.update);
+	GREATEST_ASSERT(table[1].inv.update);
+	GREATEST_ASSERT(table[2].inv.update);
+	GREATEST_ASSERT(table[3].inv.update);
+	GREATEST_ASSERT(table[4].inv.update);
+	GREATEST_ASSERT(table[5].inv.update);
+	GREATEST_ASSERT(table[6].inv.update);
+
+	GREATEST_ASSERT(!table[0].inv.draw);
+	GREATEST_ASSERT(!table[1].inv.draw);
+	GREATEST_ASSERT(!table[2].inv.draw);
+	GREATEST_ASSERT(!table[3].inv.draw);
+	GREATEST_ASSERT(!table[4].inv.draw);
+	GREATEST_ASSERT(!table[5].inv.draw);
+	GREATEST_ASSERT(!table[6].inv.draw);
+
+	GREATEST_ASSERT(!table[0].inv.end);
+	GREATEST_ASSERT(table[1].inv.end);
+	GREATEST_ASSERT(!table[2].inv.end);
+	GREATEST_ASSERT(!table[3].inv.end);
+	GREATEST_ASSERT(table[4].inv.end);
+	GREATEST_ASSERT(table[5].inv.end);
+	GREATEST_ASSERT(!table[6].inv.end);
+
+	GREATEST_ASSERT(!table[0].inv.finish);
+	GREATEST_ASSERT(table[1].inv.finish);
+	GREATEST_ASSERT(!table[2].inv.finish);
+	GREATEST_ASSERT(!table[3].inv.finish);
+	GREATEST_ASSERT(table[4].inv.finish);
+	GREATEST_ASSERT(table[5].inv.finish);
+	GREATEST_ASSERT(!table[6].inv.finish);
+
+	/* The following must still be there. */
+	GREATEST_ASSERT_EQ(st.objects[0], &table[0].dw);
+	GREATEST_ASSERT_EQ(st.objects[2], &table[2].dw);
+	GREATEST_ASSERT_EQ(st.objects[3], &table[3].dw);
+	GREATEST_ASSERT_EQ(st.objects[6], &table[6].dw);
+
+	/* The following must have been NULL-ed. */
+	GREATEST_ASSERT_EQ(st.objects[1], NULL);
+	GREATEST_ASSERT_EQ(st.objects[4], NULL);
+	GREATEST_ASSERT_EQ(st.objects[5], NULL);
+	
+	/*
+	 * Now make all actions to return true and check if it cleans the stack.
+	 */
+	table[0].dw.update =
+	    table[2].dw.update =
+	    table[3].dw.update =
+	    table[6].dw.update = my_update_true;
+
+	GREATEST_ASSERT(drawable_stack_update(&st, 0));
+	GREATEST_ASSERT_EQ(st.objects[0], NULL);
+	GREATEST_ASSERT_EQ(st.objects[1], NULL);
+	GREATEST_ASSERT_EQ(st.objects[2], NULL);
+	GREATEST_ASSERT_EQ(st.objects[3], NULL);
+	GREATEST_ASSERT_EQ(st.objects[4], NULL);
+	GREATEST_ASSERT_EQ(st.objects[5], NULL);
+	GREATEST_ASSERT_EQ(st.objects[6], NULL);
+
+	GREATEST_PASS();
+}
+
+GREATEST_TEST
+stack_finish(void)
+{
+	struct {
+		struct invokes inv;
+		struct drawable dw;
+	} table[] = {
+		{ .dw = INIT(&table[0], my_update_true)        },
+		{ .dw = INIT(&table[0], my_update_false)       },
+	};
+	struct drawable_stack st = {0};
+
+	drawable_stack_add(&st, &table[0].dw);
+	drawable_stack_add(&st, &table[1].dw);
+	drawable_stack_finish(&st);
+
+	GREATEST_ASSERT(!table[0].inv.update);
+	GREATEST_ASSERT(!table[0].inv.draw);
+	GREATEST_ASSERT(table[0].inv.end);
+	GREATEST_ASSERT(table[0].inv.finish);
+
+	GREATEST_ASSERT(!table[0].inv.update);
+	GREATEST_ASSERT(!table[0].inv.draw);
+	GREATEST_ASSERT(table[0].inv.end);
+	GREATEST_ASSERT(table[0].inv.finish);
+
+	/* They should also be NULL'ed. */
+	GREATEST_ASSERT_EQ(st.objects[0], NULL);
+	GREATEST_ASSERT_EQ(st.objects[1], NULL);
+
+	GREATEST_PASS();
+}
+
+GREATEST_SUITE(suite_stack)
+{
+	GREATEST_RUN_TEST(stack_add);
+	GREATEST_RUN_TEST(stack_update);
+	GREATEST_RUN_TEST(stack_finish);
+}
+
+GREATEST_MAIN_DEFS();
+
+int
+main(int argc, char **argv)
+{
+	GREATEST_MAIN_BEGIN();
+	GREATEST_RUN_SUITE(suite_basics);
+	GREATEST_RUN_SUITE(suite_stack);
+	GREATEST_MAIN_END();
+
+	return 0;
+}