Assertion: To verify that: when animation-timing-function is set to cubic-bezier with parameters (0,0,1,1) (this is same as setting time function to linear); animation is rendered with constant speed from begining till end.

• PASS if blue box with text "CSS3 Testing Content" moves from right to left with constant speed
• FAIL if box is moved with accelerated/decelerated speed OR fails to move left(no animation).