| <!DOCTYPE html> | 
 | <meta charset="UTF-8"> | 
 | <title>shape-margin interpolation</title> | 
 | <link rel="help" href="https://drafts.csswg.org/css-shapes/#shape-margin-property"> | 
 | <meta name="assert" content="shape-margin supports animation by computed value"> | 
 |  | 
 | <script src="/resources/testharness.js"></script> | 
 | <script src="/resources/testharnessreport.js"></script> | 
 | <script src="/css/support/interpolation-testcommon.js"></script> | 
 |  | 
 | <style> | 
 | .parent { | 
 |   shape-margin: 30px; | 
 | } | 
 | .target { | 
 |   shape-margin: 10px; | 
 | } | 
 | </style> | 
 |  | 
 | <body></body> | 
 |  | 
 | <script> | 
 | test_interpolation({ | 
 |   property: 'shape-margin', | 
 |   from: neutralKeyframe, | 
 |   to: '20px', | 
 | }, [ | 
 |   {at: -0.3, expect: '7px'}, | 
 |   {at: 0, expect: '10px'}, | 
 |   {at: 0.3, expect: '13px'}, | 
 |   {at: 0.6, expect: '16px'}, | 
 |   {at: 1, expect: '20px'}, | 
 |   {at: 1.5, expect: '25px'}, | 
 | ]); | 
 |  | 
 | test_interpolation({ | 
 |   property: 'shape-margin', | 
 |   from: 'initial', | 
 |   to: '20px', | 
 | }, [ | 
 |   {at: -0.3, expect: '0px'}, | 
 |   {at: 0, expect: '0px'}, | 
 |   {at: 0.3, expect: '6px'}, | 
 |   {at: 0.6, expect: '12px'}, | 
 |   {at: 1, expect: '20px'}, | 
 |   {at: 1.5, expect: '30px'}, | 
 | ]); | 
 |  | 
 | test_interpolation({ | 
 |   property: 'shape-margin', | 
 |   from: 'inherit', | 
 |   to: '20px', | 
 | }, [ | 
 |   {at: -0.3, expect: '33px'}, | 
 |   {at: 0, expect: '30px'}, | 
 |   {at: 0.3, expect: '27px'}, | 
 |   {at: 0.6, expect: '24px'}, | 
 |   {at: 1, expect: '20px'}, | 
 |   {at: 1.5, expect: '15px'}, | 
 | ]); | 
 |  | 
 | test_interpolation({ | 
 |   property: 'shape-margin', | 
 |   from: 'unset', | 
 |   to: '20px', | 
 | }, [ | 
 |   {at: -0.3, expect: '0px'}, | 
 |   {at: 0, expect: '0px'}, | 
 |   {at: 0.3, expect: '6px'}, | 
 |   {at: 0.6, expect: '12px'}, | 
 |   {at: 1, expect: '20px'}, | 
 |   {at: 1.5, expect: '30px'}, | 
 | ]); | 
 |  | 
 | test_interpolation({ | 
 |   property: 'shape-margin', | 
 |   from: '0px', | 
 |   to: '100px' | 
 | }, [ | 
 |   {at: -0.3, expect: '0px'}, // CSS shape-margin can't be negative. | 
 |   {at: 0, expect: '0px'}, | 
 |   {at: 0.3, expect: '30px'}, | 
 |   {at: 0.6, expect: '60px'}, | 
 |   {at: 1, expect: '100px'}, | 
 |   {at: 1.5, expect: '150px'}, | 
 | ]); | 
 | </script> |