This tests that calc() expressions depending on transitioning elements behave correctly.
PASS - "width" property for "inner" element at 0s was: 60
PASS - "width" property for "inner" element at 0.25s was: 110
PASS - "width" property for "inner" element at 0.5s was: 160
PASS - "width" property for "inner" element at 0.75s was: 210
PASS - "width" property for "inner" element at 1s was: 260
PASS - "width" property for "innerTransition" element at 0s was: 20
PASS - "width" property for "innerTransition" element at 0.25s was: 70
PASS - "width" property for "innerTransition" element at 0.5s was: 165
PASS - "width" property for "innerTransition" element at 0.75s was: 305
PASS - "width" property for "innerTransition" element at 1s was: 490