1 // Tests for util-related things 2 jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000; 3 describe('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
