[offset-anchor-interpolation.html]
  ["220px 240px" and "300px 400px" are valid offset-anchor values]
    expected: FAIL

  [Animation between "220px 240px" and "300px 400px" at progress -1]
    expected: FAIL

  [Animation between "220px 240px" and "300px 400px" at progress 0]
    expected: FAIL

  [Animation between "220px 240px" and "300px 400px" at progress 0.125]
    expected: FAIL

  [Animation between "220px 240px" and "300px 400px" at progress 0.875]
    expected: FAIL

  [Animation between "220px 240px" and "300px 400px" at progress 1]
    expected: FAIL

  [Animation between "220px 240px" and "300px 400px" at progress 2]
    expected: FAIL

  ["left 480px top 400px" and "right -140% bottom -60%" are valid offset-anchor values]
    expected: FAIL

  [Animation between "left 480px top 400px" and "right -140% bottom -60%" at progress -1]
    expected: FAIL

  [Animation between "left 480px top 400px" and "right -140% bottom -60%" at progress 0]
    expected: FAIL

  [Animation between "left 480px top 400px" and "right -140% bottom -60%" at progress 0.125]
    expected: FAIL

  [Animation between "left 480px top 400px" and "right -140% bottom -60%" at progress 0.875]
    expected: FAIL

  [Animation between "left 480px top 400px" and "right -140% bottom -60%" at progress 1]
    expected: FAIL

  [Animation between "left 480px top 400px" and "right -140% bottom -60%" at progress 2]
    expected: FAIL

  ["left top" and "left 8px bottom 20%" are valid offset-anchor values]
    expected: FAIL

  [Animation between "left top" and "left 8px bottom 20%" at progress -1]
    expected: FAIL

  [Animation between "left top" and "left 8px bottom 20%" at progress 0]
    expected: FAIL

  [Animation between "left top" and "left 8px bottom 20%" at progress 0.125]
    expected: FAIL

  [Animation between "left top" and "left 8px bottom 20%" at progress 0.875]
    expected: FAIL

  [Animation between "left top" and "left 8px bottom 20%" at progress 1]
    expected: FAIL

  [Animation between "left top" and "left 8px bottom 20%" at progress 2]
    expected: FAIL

  ["right 10px top 20%" and "auto" are valid offset-anchor values]
    expected: FAIL

  [Animation between "right 10px top 20%" and "auto" at progress -1]
    expected: FAIL

  [Animation between "right 10px top 20%" and "auto" at progress 0]
    expected: FAIL

  [Animation between "right 10px top 20%" and "auto" at progress 0.125]
    expected: FAIL

  [Animation between "right 10px top 20%" and "auto" at progress 0.875]
    expected: FAIL

  [Animation between "right 10px top 20%" and "auto" at progress 1]
    expected: FAIL

  [Animation between "right 10px top 20%" and "auto" at progress 2]
    expected: FAIL