36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
import {createSnapToZero} from '../../../src/ol/rotationconstraint.js';
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describe('ol.rotationconstraint', function() {
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describe('SnapToZero', function() {
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it('returns expected rotation value', function() {
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const rotationConstraint = createSnapToZero(0.3);
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expect(rotationConstraint(0.1, 0)).to.eql(0);
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expect(rotationConstraint(0.2, 0)).to.eql(0);
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expect(rotationConstraint(0.3, 0)).to.eql(0);
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expect(rotationConstraint(0.4, 0)).to.eql(0.4);
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expect(rotationConstraint(-0.1, 0)).to.eql(0);
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expect(rotationConstraint(-0.2, 0)).to.eql(0);
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expect(rotationConstraint(-0.3, 0)).to.eql(0);
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expect(rotationConstraint(-0.4, 0)).to.eql(-0.4);
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expect(rotationConstraint(1, -0.9)).to.eql(0);
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expect(rotationConstraint(1, -0.8)).to.eql(0);
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// floating-point arithmetic
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expect(rotationConstraint(1, -0.7)).not.to.eql(0);
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expect(rotationConstraint(1, -0.6)).to.eql(0.4);
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expect(rotationConstraint(-1, 0.9)).to.eql(0);
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expect(rotationConstraint(-1, 0.8)).to.eql(0);
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// floating-point arithmetic
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expect(rotationConstraint(-1, 0.7)).not.to.eql(0);
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expect(rotationConstraint(-1, 0.6)).to.eql(-0.4);
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});
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});
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});
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