Context test

Author: einarf

tests/test_context.py

@@ -0,0 +1,24 @@
+import moderngl
+
+from demosys.test import DemosysTestCase
+from demosys import geometry
+
+
+class ContextTestCase(DemosysTestCase):
+    """Test the headless context/window"""
+
+    def test_properties(self):
+        self.assertEqual(type(self.window.ctx), moderngl.Context)
+        # We don't have a default framebuffer in headless mode
+        self.assertIsNone(self.ctx.screen)
+        self.assertIsNotNone(self.window.fbo)
+
+    def test_basic_render(self):
+        """Ensure we actually draw something to the screen"""
+        vao = geometry.quad_fs()
+        shader = self.create_shader(path='vf_pos_color.glsl')
+        shader.uniform("color", (1.0, 1.0, 1.0, 1.0))
+        vao.draw(shader)
+
+        data = self.window.fbo.read()
+        self.assertEqual(data[:10], b'\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff')