1 files changed, 72 insertions, 0 deletions
diff --git a/test/test-render.cpp b/test/test-render.cpp
index f2f658f..590f8b3 100644
--- a/test/test-render.cpp
+++ b/test/test-render.cpp
@@ -47,6 +47,78 @@ public:
 };
 
 BOOST_GLOBAL_FIXTURE(ApplicationBase);
+
+#define TEST_WINDOW_PARAMS __FILE__, 0, 0, 640, 480, SDL_WINDOW_OPENGL | SDL_WINDOW_HIDDEN
+static void
+CreateProgramTest()
+{
+	ProgramRef p;
+	BOOST_REQUIRE(p);
+}
+BOOST_AUTO_TEST_CASE(windowContextThingsBehaviour1)
+{
+	BOOST_REQUIRE(!glCreateProgram); // Init not called yet
+	{
+		SDL_WindowPtr window {TEST_WINDOW_PARAMS};
+		BOOST_REQUIRE(window);
+		BOOST_REQUIRE(!glCreateProgram);
+		BOOST_REQUIRE_NE(glewInit(), GLEW_OK); // No context yet
+		{
+			SDL_GLContextPtr context {window};
+			BOOST_REQUIRE(context);
+			BOOST_REQUIRE(!glCreateProgram);
+			BOOST_REQUIRE_EQUAL(glewInit(), GLEW_OK);
+			BOOST_REQUIRE(glCreateProgram);
+			CreateProgramTest();
+		} // Context destroyed
+		BOOST_REQUIRE(glCreateProgram); // Functions still set
+		BOOST_REQUIRE_THROW({ ProgramRef p; }, std::exception); // Get fails with no context
+		{
+			SDL_GLContextPtr context {window};
+			BOOST_REQUIRE(context);
+			CreateProgramTest();
+		}
+	}
+	{
+		SDL_WindowPtr window {TEST_WINDOW_PARAMS};
+		BOOST_REQUIRE(window);
+		SDL_GLContextPtr context {window};
+		BOOST_REQUIRE(context);
+		CreateProgramTest();
+	}
+}
+
+BOOST_AUTO_TEST_CASE(windowContextThingsBehaviour2)
+{
+	SDL_WindowPtr window1 {TEST_WINDOW_PARAMS};
+	BOOST_REQUIRE(window1);
+	{
+		SDL_WindowPtr window2 {TEST_WINDOW_PARAMS};
+		BOOST_REQUIRE(window2);
+		SDL_GLContextPtr context {window2};
+		BOOST_REQUIRE(context);
+		CreateProgramTest();
+	}
+	BOOST_REQUIRE_THROW({ ProgramRef p; }, std::exception); // Get fails with no context
+}
+
+BOOST_AUTO_TEST_CASE(windowContextThingsBehaviour3)
+{
+	std::optional<SDL_WindowPtr> window1 {std::in_place, TEST_WINDOW_PARAMS};
+	std::optional<SDL_WindowPtr> window2 {std::in_place, TEST_WINDOW_PARAMS};
+	BOOST_REQUIRE(window1);
+	BOOST_REQUIRE(window1.value());
+	SDL_GLContextPtr context {window1.value()};
+	BOOST_REQUIRE(context);
+	CreateProgramTest();
+	window1.reset();
+	BOOST_REQUIRE_THROW({ ProgramRef p; }, std::exception); // Get fails with context's window gone
+	window1.emplace(TEST_WINDOW_PARAMS);
+	BOOST_REQUIRE(window1);
+	BOOST_REQUIRE(window1.value());
+	BOOST_REQUIRE_THROW({ ProgramRef p; }, std::exception); // Get still fails with context's window gone
+}
+
 BOOST_FIXTURE_TEST_SUITE(w, TestRenderWindow);
 
 BOOST_AUTO_TEST_CASE(basic)