83a6a6ea32
* chore: make aware eslint that we use jest By setting up the jest environment, we no longer need to declare the 'test' global in the configuration. * chore: don't need to import expect, it's a jest environment global * chore: don't need to import expect when creating undefined test
40 lines
1.0 KiB
JavaScript
40 lines
1.0 KiB
JavaScript
const {uniqueElementsBy} = require('./_30s.js');
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test('uniqueElementsBy is a Function', () => {
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expect(uniqueElementsBy).toBeInstanceOf(Function);
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});
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test('uniqueElementsBy works for properties', () => {
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expect(
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uniqueElementsBy(
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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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)
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).toEqual([{ id: 0, value: 'a' }, { id: 1, value: 'b' }, { id: 2, value: 'c' }]);
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});
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test('uniqueElementsBy works for nested properties', () => {
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expect(
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uniqueElementsBy(
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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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)
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).toEqual([
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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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]);
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});
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