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fix: concurrent write on LRU cache (#200)

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harttle
2020-03-10 01:09:41 +08:00
parent 06ad0481db
commit 6de933897e
3 changed files with 69 additions and 13 deletions
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test/unit/cache/lru.ts
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+33 -1
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@@ -20,7 +20,31 @@ describe('LRU', () => {
expect(lru.size).to.equal(0)
expect(lru.read('foo')).to.be.undefined
})
it('should remove lrc item when full(2)', () => {
it('should remove lrc item when full(limit=-1)', () => {
const lru = new LRU(-1)
lru.write('foo', 'FOO')
lru.write('bar', 'BAR')
expect(lru.size).to.equal(0)
expect(lru.read('foo')).to.be.undefined
expect(lru.read('bar')).to.be.undefined
})
it('should remove lrc item when full(limit=0)', () => {
const lru = new LRU(0)
lru.write('foo', 'FOO')
lru.write('bar', 'BAR')
expect(lru.size).to.equal(0)
expect(lru.read('foo')).to.be.undefined
expect(lru.read('bar')).to.be.undefined
})
it('should remove lrc item when full(limit=1)', () => {
const lru = new LRU(1)
lru.write('foo', 'FOO')
lru.write('bar', 'BAR')
expect(lru.size).to.equal(1)
expect(lru.read('foo')).to.be.undefined
expect(lru.read('bar')).to.equal('BAR')
})
it('should remove lrc item when full(limit=2)', () => {
const lru = new LRU(2)
expect(lru.size).to.equal(0)
lru.write('foo', 'FOO')
@@ -33,4 +57,12 @@ describe('LRU', () => {
expect(lru.read('bar')).to.equal('BAR')
expect(lru.read('coo')).to.equal('COO')
})
it('should overwrite item the with same key', () => {
const lru = new LRU(2)
lru.write('foo', 'FOO')
expect(lru.size).to.equal(1)
lru.write('foo', 'BAR')
expect(lru.size).to.equal(1)
expect(lru.read('foo')).to.equal('BAR')
})
})