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'use strict';
const start = require('./common');
const Collection = require('../lib/collection');const assert = require('assert');
const mongoose = start.mongoose;
describe('collections:', function() {  it('should buffer commands until connection is established', function(done) {    const db = mongoose.createConnection();    const collection = db.collection('test-buffering-collection');    let connected = false;    let insertedId = undefined;    let pending = 2;
    function finish() {      if (--pending) {        return;      }      assert.ok(connected);      assert.ok(insertedId !== undefined);      collection.findOne({ _id: insertedId }).then(doc => {        assert.strictEqual(doc.foo, 'bar');        db.close();        done();      });    }
    collection.insertOne({ foo: 'bar' }, {}, function(err, result) {      assert.ok(connected);      insertedId = result.insertedId;      finish();    });
    const uri = start.uri;    db.openUri(process.env.MONGOOSE_TEST_URI || uri, function(err) {      connected = !err;      finish();    });  });
  it('returns a promise if buffering and no callback (gh-7676)', function(done) {    const db = mongoose.createConnection();    const collection = db.collection('gh7676');
    const promise = collection.insertOne({ foo: 'bar' }, {})      .then(result =>        collection.findOne({ _id: result.insertedId })      ).then(doc => {        assert.strictEqual(doc.foo, 'bar');      });
    db.openUri(start.uri, function(err) {      assert.ifError(err);      promise.then(() => done(), done);    });  });
  it('methods should that throw (unimplemented)', function() {    const collection = new Collection('test', mongoose.connection);    let thrown = false;
    try {      collection.getIndexes();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.update();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.save();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.insertOne();    } catch (e) {      assert.ok(/unimplemented/.test(e.message), e.message);      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.find();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.findOne();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.findAndModify();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;
    try {      collection.ensureIndex();    } catch (e) {      assert.ok(/unimplemented/.test(e.message));      thrown = true;    }
    assert.ok(thrown);    thrown = false;  });
  it('buffers for sync methods (gh-10610)', function(done) {    const db = mongoose.createConnection();    const collection = db.collection('gh10610');
    collection.find({}, {}, function(err, res) {      assert.ifError(err);      assert.equal(typeof res.toArray, 'function');      done();    });
    const uri = start.uri;    db.openUri(process.env.MONGOOSE_TEST_URI || uri);  });});