loopback-datasource-juggler/test/datasource.test.js

// Copyright IBM Corp. 2016. All Rights Reserved.
// Node module: loopback-datasource-juggler
// This file is licensed under the MIT License.
// License text available at https://opensource.org/licenses/MIT

'use strict';

var should = require('./init.js');
var DataSource = require('../lib/datasource.js').DataSource;

describe('DataSource', function() {
  it('reports helpful error when connector init throws', function() {
    var throwingConnector = {
      name: 'loopback-connector-throwing',
      initialize: function(ds, cb) {
        throw new Error('expected test error');
      },
    };

    (function() {
      // this is what LoopBack does
      return new DataSource({
        name: 'dsname',
        connector: throwingConnector,
      });
    }).should.throw(/loopback-connector-throwing/);
  });

  it('reports helpful error when connector init via short name throws', function() {
    (function() {
      // this is what LoopBack does
      return new DataSource({
        name: 'dsname',
        connector: 'throwing',
      });
    }).should.throw(/expected test error/);
  });

  it('reports helpful error when connector init via long name throws', function() {
    (function() {
      // this is what LoopBack does
      return new DataSource({
        name: 'dsname',
        connector: 'loopback-connector-throwing',
      });
    }).should.throw(/expected test error/);
  });

  it('should retain the name assigned to it', function() {
    var dataSource = new DataSource('ram', {
      connector: 'memory',
    });

    dataSource.name.should.equal('ram');
  });

  it('should allow the name assigned to it to take precedence over the settings name', function() {
    var dataSource = new DataSource('ram', {
      name: 'temp',
      connector: 'memory',
    });

    dataSource.name.should.equal('ram');
  });

  it('should retain the name from the settings if no name is assigned', function() {
    var dataSource = new DataSource({
      name: 'temp',
      connector: 'memory',
    });

    dataSource.name.should.equal('temp');
  });

  it('should use the connector name if no name is provided', function() {
    var dataSource = new DataSource({
      connector: 'memory',
    });

    dataSource.name.should.equal('memory');
  });
});