91 lines
2.3 KiB
JavaScript
91 lines
2.3 KiB
JavaScript
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'use strict'
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const kNone = Symbol('none')
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const kProtected = Symbol('protected')
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function testCommon (options) {
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const factory = options.factory
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const test = options.test
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if (typeof factory !== 'function') {
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throw new TypeError('factory must be a function')
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}
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if (typeof test !== 'function') {
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throw new TypeError('test must be a function')
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}
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if (options.legacyRange != null) {
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throw new Error('The legacyRange option has been removed')
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}
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let supports = kNone
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return protect(options, {
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test: test,
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factory: factory,
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internals: options.internals || {},
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// Expose manifest through testCommon to more easily skip tests based on
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// supported features. Use a getter to only create a db once. Implicitly
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// we also test that the manifest doesn't change after the db constructor.
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get supports () {
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if (supports === kNone) this.supports = this.factory().supports
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return supports
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},
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// Prefer assigning early via manifest-test unless test.only() is used
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// in which case we create the manifest on-demand. Copy it to be safe.
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set supports (value) {
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if (supports === kNone) supports = JSON.parse(JSON.stringify(value))
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}
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})
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}
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module.exports = testCommon
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// To help migrating from abstract-leveldown.
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// Throw if test suite options are used instead of db.supports
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function protect (options, testCommon) {
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const legacyOptions = [
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['createIfMissing', true],
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['errorIfExists', true],
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['snapshots', true],
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['seek', true],
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['encodings', true],
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['deferredOpen', true],
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['streams', true],
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['clear', true],
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['getMany', true],
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['bufferKeys', false],
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['serialize', false],
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['idempotentOpen', false],
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['passiveOpen', false],
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['openCallback', false]
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]
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Object.defineProperty(testCommon, kProtected, {
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value: true
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})
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for (const [k, exists] of legacyOptions) {
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const msg = exists ? 'has moved to db.supports' : 'has been removed'
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// Options may be a testCommon instance
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if (!options[kProtected] && k in options) {
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throw new Error(`The test suite option '${k}' ${msg}`)
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}
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Object.defineProperty(testCommon, k, {
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get () {
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throw new Error(`The test suite option '${k}' ${msg}`)
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},
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set () {
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throw new Error(`The test suite option '${k}' ${msg}`)
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}
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})
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}
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return testCommon
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}
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