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48 lines
1.3 KiB
TypeScript
48 lines
1.3 KiB
TypeScript
import { assign } from '../assign';
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describe('assign', () => {
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it('will merge many objects together', () => {
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expect(assign({ a: 1 }, { b: 2 })).toEqual({ a: 1, b: 2 });
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expect(assign({ a: 1 }, { b: 2 }, { c: 3 })).toEqual({
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a: 1,
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b: 2,
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c: 3,
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});
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expect(assign({ a: 1 }, { b: 2 }, { c: 3 }, { d: 4 })).toEqual({
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a: 1,
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b: 2,
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c: 3,
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d: 4,
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});
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});
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it('will merge many objects together shallowly', () => {
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expect(assign({ x: { a: 1 } }, { x: { b: 2 } })).toEqual({ x: { b: 2 } });
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expect(assign({ x: { a: 1 } }, { x: { b: 2 } }, { x: { c: 3 } })).toEqual({
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x: { c: 3 },
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});
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expect(
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assign(
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{ x: { a: 1 } },
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{ x: { b: 2 } },
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{ x: { c: 3 } },
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{ x: { d: 4 } },
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),
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).toEqual({ x: { d: 4 } });
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});
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it('will mutate and return the source objects', () => {
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const source1 = { a: 1 };
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const source2 = { a: 1 };
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const source3 = { a: 1 };
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expect(assign(source1, { b: 2 })).toEqual(source1);
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expect(assign(source2, { b: 2 }, { c: 3 })).toEqual(source2);
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expect(assign(source3, { b: 2 }, { c: 3 }, { d: 4 })).toEqual(source3);
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expect(source1).toEqual({ a: 1, b: 2 });
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expect(source2).toEqual({ a: 1, b: 2, c: 3 });
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expect(source3).toEqual({ a: 1, b: 2, c: 3, d: 4 });
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});
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});
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