mirror of
https://github.com/chartjs/Chart.js.git
synced 2024-10-06 12:19:08 +02:00
391e4b6f2e
* generate a flat helpers package * move helpers built files to dist * upgrade docs for flat helpers
36 lines
2.1 KiB
JavaScript
36 lines
2.1 KiB
JavaScript
const {_pointInLine, _steppedInterpolation, _bezierInterpolation} = Chart.helpers;
|
|
|
|
describe('helpers.interpolation', function() {
|
|
it('Should interpolate a point in line', function() {
|
|
expect(_pointInLine({x: 10, y: 10}, {x: 20, y: 20}, 0)).toEqual({x: 10, y: 10});
|
|
expect(_pointInLine({x: 10, y: 10}, {x: 20, y: 20}, 0.5)).toEqual({x: 15, y: 15});
|
|
expect(_pointInLine({x: 10, y: 10}, {x: 20, y: 20}, 1)).toEqual({x: 20, y: 20});
|
|
});
|
|
|
|
it('Should intepolate a point in stepped line', function() {
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0, 'before')).toEqual({x: 10, y: 10});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0.4, 'before')).toEqual({x: 14, y: 20});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0.5, 'before')).toEqual({x: 15, y: 20});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 1, 'before')).toEqual({x: 20, y: 20});
|
|
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0, 'middle')).toEqual({x: 10, y: 10});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0.4, 'middle')).toEqual({x: 14, y: 10});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0.5, 'middle')).toEqual({x: 15, y: 20});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 1, 'middle')).toEqual({x: 20, y: 20});
|
|
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0, 'after')).toEqual({x: 10, y: 10});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0.4, 'after')).toEqual({x: 14, y: 10});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 0.5, 'after')).toEqual({x: 15, y: 10});
|
|
expect(_steppedInterpolation({x: 10, y: 10}, {x: 20, y: 20}, 1, 'after')).toEqual({x: 20, y: 20});
|
|
});
|
|
|
|
it('Should interpolate a point in curve', function() {
|
|
const pt1 = {x: 10, y: 10, controlPointNextX: 12, controlPointNextY: 12};
|
|
const pt2 = {x: 20, y: 30, controlPointPreviousX: 18, controlPointPreviousY: 28};
|
|
|
|
expect(_bezierInterpolation(pt1, pt2, 0)).toEqual({x: 10, y: 10});
|
|
expect(_bezierInterpolation(pt1, pt2, 0.2)).toBeCloseToPoint({x: 11.616, y: 12.656});
|
|
expect(_bezierInterpolation(pt1, pt2, 1)).toEqual({x: 20, y: 30});
|
|
});
|
|
});
|