This tests framebuffer/renderbuffer-related functions On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Canvas.getContext PASS context exists Checking framebuffer/renderbuffer stuff. PASS calling getFramebufferAttachmentParameter on the default framebuffer should generate INVALID_OPERATION. PASS calling checkFramebufferStatus on the default framebuffer should generate FRAMEBUFFER_COMPLETE. PASS trying to attach a texture to default framebuffer should generate INVALID_OPERATION. PASS trying to detach default renderbuffer from default framebuffer should generate INVALID_OPERATION. PASS allocating renderbuffer storage of a newly created renderbuffer should succeed. PASS trying to attach a renderbuffer to the default framebuffer should generate INVALID_OPERATION. PASS binding a newly created framebuffer should succeed. PASS calling getFramebufferAttachmentParameter with target = READ_FRAMEBUFFER should generate INVALID_ENUM. PASS calling checkFramebufferStatus with target = READ_FRAMEBUFFER should return 0. PASS calling checkFramebufferStatus with target = READ_FRAMEBUFFER should generate INVALID_ENUM. PASS calling bindFramebuffer with target = READ_FRAMEBUFFER should generate INVALID_ENUM. PASS calling bindFramebuffer with target = READ_FRAMEBUFFER should not change FRAMEBUFFER_BINDING. PASS calling getFramebufferAttachmentParameter with target = READ_FRAMEBUFFER should generate INVALID_ENUM. PASS calling framebufferTexImage2D with target = READ_FRAMEBUFFER should generate INVALID_ENUM. PASS calling framebufferRenderbuffer with target = READ_FRAMEBUFFER should generate INVALID_ENUM. PASS calling framebufferTexImage2D with attachment = COLOR_ATTACHMENT1 should generate INVALID_ENUM. PASS calling framebufferRenderbuffer with attachment = COLOR_ATTACHMENT1 should generate INVALID_ENUM. PASS calling getFramebufferAttachmentParameter with pname = GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING should generate INVALID_ENUM. PASS attaching a texture to a framebuffer should succeed. PASS detaching a texture from a framebuffer should succeed. PASS calling framebufferTexture2D with non-zero mipmap level should generate INVALID_VALUE. PASS attaching a renderbuffer to a framebuffer should succeed. PASS detaching a renderbuffer from a framebuffer should succeed. PASS binding default (null) framebuffer should succeed. PASS successfullyParsed is true TEST COMPLETE