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98 lines
3.1 KiB
98 lines
3.1 KiB
const expect = require('expect.js') |
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const co = require('co') |
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const _ = require('lodash') |
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const describe = require('mocha').describe |
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const it = require('mocha').it |
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const Pool = require('../') |
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describe('maxUses', () => { |
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it( |
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'can create a single client and use it once', |
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co.wrap(function* () { |
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const pool = new Pool({ maxUses: 2 }) |
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expect(pool.waitingCount).to.equal(0) |
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const client = yield pool.connect() |
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const res = yield client.query('SELECT $1::text as name', ['hi']) |
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expect(res.rows[0].name).to.equal('hi') |
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client.release() |
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pool.end() |
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}) |
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) |
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it( |
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'getting a connection a second time returns the same connection and releasing it also closes it', |
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co.wrap(function* () { |
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const pool = new Pool({ maxUses: 2 }) |
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expect(pool.waitingCount).to.equal(0) |
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const client = yield pool.connect() |
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client.release() |
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const client2 = yield pool.connect() |
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expect(client).to.equal(client2) |
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expect(client2._ending).to.equal(false) |
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client2.release() |
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expect(client2._ending).to.equal(true) |
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return yield pool.end() |
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}) |
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) |
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it( |
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'getting a connection a third time returns a new connection', |
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co.wrap(function* () { |
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const pool = new Pool({ maxUses: 2 }) |
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expect(pool.waitingCount).to.equal(0) |
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const client = yield pool.connect() |
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client.release() |
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const client2 = yield pool.connect() |
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expect(client).to.equal(client2) |
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client2.release() |
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const client3 = yield pool.connect() |
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expect(client3).not.to.equal(client2) |
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client3.release() |
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return yield pool.end() |
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}) |
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) |
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it( |
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'getting a connection from a pending request gets a fresh client when the released candidate is expended', |
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co.wrap(function* () { |
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const pool = new Pool({ max: 1, maxUses: 2 }) |
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expect(pool.waitingCount).to.equal(0) |
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const client1 = yield pool.connect() |
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pool.connect().then((client2) => { |
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expect(client2).to.equal(client1) |
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expect(pool.waitingCount).to.equal(1) |
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// Releasing the client this time should also expend it since maxUses is 2, causing client3 to be a fresh client |
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client2.release() |
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}) |
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const client3Promise = pool.connect().then((client3) => { |
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// client3 should be a fresh client since client2's release caused the first client to be expended |
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expect(pool.waitingCount).to.equal(0) |
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expect(client3).not.to.equal(client1) |
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return client3.release() |
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}) |
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// There should be two pending requests since we have 3 connect requests but a max size of 1 |
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expect(pool.waitingCount).to.equal(2) |
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// Releasing the client should not yet expend it since maxUses is 2 |
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client1.release() |
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yield client3Promise |
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return yield pool.end() |
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}) |
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) |
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it( |
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'logs when removing an expended client', |
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co.wrap(function* () { |
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const messages = [] |
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const log = function (msg) { |
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messages.push(msg) |
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} |
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const pool = new Pool({ maxUses: 1, log }) |
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const client = yield pool.connect() |
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client.release() |
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expect(messages).to.contain('remove expended client') |
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return yield pool.end() |
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}) |
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) |
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})
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