1// Tests for util-related things
2jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000;
3describe('PathKit\'s CubicMap Behavior', function() {
4    // Note, don't try to print the PathKit object - it can cause Karma/Jasmine to lock up.
5    var PathKit = null;
6    const LoadPathKit = new Promise(function(resolve, reject) {
7        if (PathKit) {
8            resolve();
9        } else {
10            PathKitInit({
11                locateFile: (file) => '/pathkit/'+file,
12            }).ready().then((_PathKit) => {
13                PathKit = _PathKit;
14                resolve();
15            });
16        }
17    });
18
19    it('computes YFromX correctly', function(done) {
20        LoadPathKit.then(catchException(done, () => {
21            // Spot check a few points
22            const testcases = [
23                // input x, expected y
24                [0.025391,  0.117627],
25                [0.333984,  0.276221],
26                [0.662109,  0.366052],
27                [0.939453,  0.643296],
28            ];
29            for (tc of testcases) {
30                expect(PathKit.cubicYFromX(0, 0.5, 1.0, 0, tc[0])).toBeCloseTo(tc[1], 5);
31            }
32            done();
33        }));
34    });
35    it('computes a point from T correctly', function(done) {
36        LoadPathKit.then(catchException(done, () => {
37            // Spot check a few points
38            const testcases = [
39                // input t, expected x, expected y
40                [0.25, [0.128125, 0.240625]],
41                [0.5,  [0.35, 0.35]],
42                [0.75, [0.646875, 0.534375]],
43                [1.0, [1.0, 1.0]],
44            ];
45            for (tc of testcases) {
46                let ans = PathKit.cubicPtFromT(0.1, 0.5, 0.5, 0.1, tc[0]);
47                expect(ans).toBeTruthy();
48                expect(ans.length).toBe(2);
49                expect(ans[0]).toBeCloseTo(tc[1][0]);
50                expect(ans[1]).toBeCloseTo(tc[1][1]);
51            }
52            done();
53        }));
54    });
55
56    it('does not leak, with or without cache', function(done) {
57        LoadPathKit.then(catchException(done, () => {
58            // Run it a lot to make sure we don't leak.
59            for (let i = 0; i < 300000; i++) {
60                PathKit.cubicYFromX(0.1, 0.5, 0.5, 0.1, 0.1);
61                PathKit.cubicPtFromT(0.1, 0.5, 0.5, 0.1, 0.1);
62            }
63            done();
64        }));
65    });
66
67});
68