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31 lines
1.3 KiB
JavaScript
31 lines
1.3 KiB
JavaScript
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import {_lookup, _lookupByKey, _rlookupByKey} from '../../src/helpers/helpers.collection';
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describe('helpers.interpolation', function() {
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it('Should do binary search', function() {
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const data = [0, 2, 6, 9];
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expect(_lookup(data, 0)).toEqual({lo: 0, hi: 1});
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expect(_lookup(data, 1)).toEqual({lo: 0, hi: 1});
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expect(_lookup(data, 3)).toEqual({lo: 1, hi: 2});
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expect(_lookup(data, 6)).toEqual({lo: 1, hi: 2});
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expect(_lookup(data, 9)).toEqual({lo: 2, hi: 3});
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});
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it('Should do binary search by key', function() {
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const data = [{x: 0}, {x: 2}, {x: 6}, {x: 9}];
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expect(_lookupByKey(data, 'x', 0)).toEqual({lo: 0, hi: 1});
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expect(_lookupByKey(data, 'x', 1)).toEqual({lo: 0, hi: 1});
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expect(_lookupByKey(data, 'x', 3)).toEqual({lo: 1, hi: 2});
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expect(_lookupByKey(data, 'x', 6)).toEqual({lo: 1, hi: 2});
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expect(_lookupByKey(data, 'x', 9)).toEqual({lo: 2, hi: 3});
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});
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it('Should do reverse binary search by key', function() {
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const data = [{x: 10}, {x: 7}, {x: 3}, {x: 0}];
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expect(_rlookupByKey(data, 'x', 0)).toEqual({lo: 2, hi: 3});
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expect(_rlookupByKey(data, 'x', 3)).toEqual({lo: 2, hi: 3});
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expect(_rlookupByKey(data, 'x', 5)).toEqual({lo: 1, hi: 2});
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expect(_rlookupByKey(data, 'x', 8)).toEqual({lo: 0, hi: 1});
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expect(_rlookupByKey(data, 'x', 10)).toEqual({lo: 0, hi: 1});
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});
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});
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