75 lines
1.7 KiB
TypeScript
75 lines
1.7 KiB
TypeScript
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import { expect } from 'chai'
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import { describe, it } from 'mocha'
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import { memoizeGetters } from '../src/utils/memoize'
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describe('memoizeGetters', () => {
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it('should memoize getters', () => {
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class Test {
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private _value = 0
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get value() {
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return this._value++
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}
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}
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memoizeGetters(Test, ['value'])
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const test = new Test()
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expect(test.value).to.equal(0)
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expect(test.value).to.equal(0)
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expect(test.value).to.equal(0)
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})
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it('should not share state across multiple instances', () => {
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class Test {
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get value() {
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return Math.random()
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}
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}
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memoizeGetters(Test, ['value'])
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const test1 = new Test()
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const test2 = new Test()
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const val = test1.value
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expect(test1.value).to.equal(val)
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expect(test2.value).to.not.equal(val)
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})
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it('should only memoize the specified getters', () => {
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class Test {
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get memoized() {
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return Math.random()
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}
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get other() {
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return Math.random()
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}
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}
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memoizeGetters(Test, ['memoized'])
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const test = new Test()
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expect(test.memoized).to.equal(test.memoized)
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expect(test.other).to.not.equal(test.other)
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})
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it('should propagate errors', () => {
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class Test {
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get value() {
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throw new Error('test')
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}
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}
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memoizeGetters(Test, ['value'])
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const test = new Test()
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expect(() => test.value).to.throw('test')
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expect(() => test.value).to.throw('test')
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})
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})
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