any-db-transaction/tests/connection-event-forwarding.js

Transaction object for Any-DB adapters

var begin = require('../')

require('../test')('Forwarding of connection events', function(conn, t) {
  var tx1 = begin(conn)

  t.test('root transaction', function(t) {
    t.ok(
      conn.listeners('error').indexOf(tx1.handleError) > -1,
      "Transaction forwards 'error' event",
    )

    t.ok(conn.listeners('query').indexOf(tx1._emitQuery) > -1, "Transaction forwards 'query' event")

    t.end()
  })

  t.test('With nested transaction in progress', function(t) {
    begin(tx1, function(err, tx2) {
      if (err) throw err

      t.ok(
        conn.listeners('error').indexOf(tx2.handleError) > -1,
        "Child transaction forwards 'error' event",
      )

      t.ok(
        conn.listeners('query').indexOf(tx2._emitQuery) > -1,
        "Child transaction forwards 'query' event",
      )

      t.ok(
        tx2.listeners('query').indexOf(tx1._emitQuery) > -1,
        "Parent transaction forwards child 'query' event",
      )

      t.ok(
        conn.listeners('error').indexOf(tx1.handleError) < 0,
        "Parent transaction does *not* forward connection 'error' event",
      )

      t.ok(
        conn.listeners('query').indexOf(tx1._emitQuery) < 0,
        "Parent transaction does *not* forward connection 'query' event",
      )

      tx2.commit(function(err) {
        if (err) throw err
        t.end()
      })
    })
  })

  t.test('After nested transaction completes', function(t) {
    t.ok(
      conn.listeners('error').indexOf(tx1.handleError) > -1,
      "Transaction forwards 'error' event again",
    )

    t.ok(
      conn.listeners('query').indexOf(tx1._emitQuery) > -1,
      "Transaction forwards 'query' event again",
    )

    tx1.commit(function(err) {
      if (err) throw err
      t.end()
    })
  })
})