This is a testharness.js-based test.
[FAIL] SMIL: Interpolate attribute <points> with underlying [10 10, 20 20] from add [40 40, 30 30] to add [90 90, -10 -10, 50 50] at (0) is [50 50, 50 50]
assert_equals: expected "50 , 50 , 50 , 50 " but got "40 , 40 , 30 , 30 "
[FAIL] SMIL: Interpolate attribute <points> with underlying [10 10, 20 20] from add [40 40, 30 30] to add [90 90, -10 -10, 50 50] at (0.2) is [50 50, 50 50]
assert_equals: expected "50 , 50 , 50 , 50 " but got "40 , 40 , 30 , 30 "
Harness: the test ran to completion.