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test.js
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test.js
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'use strict'
const test = require('tape')
const suite = require('abstract-level/test')
const { MemoryLevel } = require('.')
const { Buffer } = require('buffer')
// Test abstract-level compliance
suite({
test,
factory: (...args) => new MemoryLevel(...args)
})
// Test with custom store encodings
for (const storeEncoding of ['view', 'utf8']) {
suite({
test,
factory (options) {
return new MemoryLevel({ ...options, storeEncoding })
}
})
}
// Additional tests for this implementation of abstract-level
test('iterator does not clone buffers', function (t) {
const db = new MemoryLevel({ keyEncoding: 'buffer', valueEncoding: 'buffer' })
const buf = Buffer.from('a')
db.open(function (err) {
t.ifError(err, 'no open() error')
db.put(buf, buf, function (err) {
t.ifError(err, 'no put() error')
db.iterator().all(function (err, entries) {
t.ifError(err, 'no all() error')
t.is(entries[0][0], buf, 'key is same buffer')
t.is(entries[0][1], buf, 'value is same buffer')
t.end()
})
})
})
})
test('throws on unsupported storeEncoding', function (t) {
t.throws(() => new MemoryLevel({ storeEncoding: 'foo' }), (err) => err.code === 'LEVEL_ENCODING_NOT_SUPPORTED')
t.end()
})
test('throws on legacy level-mem options', function (t) {
t.throws(() => new MemoryLevel(() => {}), (err) => err.code === 'LEVEL_LEGACY')
t.throws(() => new MemoryLevel('x', () => {}), (err) => err.code === 'LEVEL_LEGACY')
t.throws(() => new MemoryLevel('x', {}, () => {}), (err) => err.code === 'LEVEL_LEGACY')
t.end()
})