33 lines
877 B
JavaScript
33 lines
877 B
JavaScript
const expect = require('expect');
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const filterNonUniqueBy = require('./filterNonUniqueBy.js');
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test('filterNonUniqueBy is a Function', () => {
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expect(filterNonUniqueBy).toBeInstanceOf(Function);
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});
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test('filterNonUniqueBy works for properties', () => {
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expect(filterNonUniqueBy(
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[
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{ id: 0, value: 'a' },
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{ id: 1, value: 'b' },
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{ id: 2, value: 'c' },
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{ id: 1, value: 'd' },
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{ id: 0, value: 'e' },
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],
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(a, b) => a.id == b.id
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)).toEqual([ { id: 2, value: 'c' } ]);
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});
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test('filterNonUniqueBy works for nested properties', () => {
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expect(filterNonUniqueBy(
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[
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{ id: 0, value: 'a', n: {p: 0} },
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{ id: 1, value: 'b', n: {p: 1} },
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{ id: 2, value: 'c', n: {p: 2} },
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{ id: 1, value: 'd', n: {p: 0} },
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{ id: 0, value: 'e', n: {p: 1} },
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],
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(a, b) => a.id == b.id
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)).toEqual([ { id: 2, value: 'c', n: {p: 2} } ]);
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});
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