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

// Copyright IBM Corp. 2013,2016. 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

// This test written in mocha+should.js
var should = require('./init.js');
var assert = require('assert');

var jdb = require('../');
var ModelBuilder = jdb.ModelBuilder;
var DataSource = jdb.DataSource;
var Memory = require('../lib/connectors/memory');

var ModelDefinition = require('../lib/model-definition');

describe('ModelDefinition class', function() {
  var memory;
  beforeEach(function() {
    memory = new DataSource({ connector: Memory });
  });

  it('should be able to define plain models', function(done) {
    var modelBuilder = new ModelBuilder();

    var User = new ModelDefinition(modelBuilder, 'User', {
      name: 'string',
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: 'number',
    });

    User.build();
    assert.equal(User.properties.name.type, String);
    assert.equal(User.properties.bio.type, ModelBuilder.Text);
    assert.equal(User.properties.approved.type, Boolean);
    assert.equal(User.properties.joinedAt.type, Date);
    assert.equal(User.properties.age.type, Number);

    var json = User.toJSON();
    assert.equal(json.name, 'User');
    assert.equal(json.properties.name.type, 'String');
    assert.equal(json.properties.bio.type, 'Text');
    assert.equal(json.properties.approved.type, 'Boolean');
    assert.equal(json.properties.joinedAt.type, 'Date');
    assert.equal(json.properties.age.type, 'Number');

    assert.deepEqual(User.toJSON(), json);

    done();

  });

  it('should be able to define additional properties', function(done) {
    var modelBuilder = new ModelBuilder();

    var User = new ModelDefinition(modelBuilder, 'User', {
      name: 'string',
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: 'number',
    });

    User.build();

    var json = User.toJSON();

    User.defineProperty('id', { type: 'number', id: true });
    assert.equal(User.properties.name.type, String);
    assert.equal(User.properties.bio.type, ModelBuilder.Text);
    assert.equal(User.properties.approved.type, Boolean);
    assert.equal(User.properties.joinedAt.type, Date);
    assert.equal(User.properties.age.type, Number);

    assert.equal(User.properties.id.type, Number);

    json = User.toJSON();
    assert.deepEqual(json.properties.id, { type: 'Number', id: true });

    done();

  });

  it('should be able to define nesting models', function(done) {
    var modelBuilder = new ModelBuilder();

    var User = new ModelDefinition(modelBuilder, 'User', {
      name: String,
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: Number,
      address: {
        street: String,
        city: String,
        zipCode: String,
        state: String,
      },
    });

    User.build();
    assert.equal(User.properties.name.type, String);
    assert.equal(User.properties.bio.type, ModelBuilder.Text);
    assert.equal(User.properties.approved.type, Boolean);
    assert.equal(User.properties.joinedAt.type, Date);
    assert.equal(User.properties.age.type, Number);
    assert.equal(typeof User.properties.address.type, 'function');

    var json = User.toJSON();
    assert.equal(json.name, 'User');
    assert.equal(json.properties.name.type, 'String');
    assert.equal(json.properties.bio.type, 'Text');
    assert.equal(json.properties.approved.type, 'Boolean');
    assert.equal(json.properties.joinedAt.type, 'Date');
    assert.equal(json.properties.age.type, 'Number');

    assert.deepEqual(json.properties.address.type, { street: { type: 'String' },
      city: { type: 'String' },
      zipCode: { type: 'String' },
      state: { type: 'String' }});

    done();

  });

  it('should be able to define referencing models', function(done) {
    var modelBuilder = new ModelBuilder();

    var Address = modelBuilder.define('Address', {
      street: String,
      city: String,
      zipCode: String,
      state: String,
    });
    var User = new ModelDefinition(modelBuilder, 'User', {
      name: String,
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: Number,
      address: Address,

    });

    User.build();
    assert.equal(User.properties.name.type, String);
    assert.equal(User.properties.bio.type, ModelBuilder.Text);
    assert.equal(User.properties.approved.type, Boolean);
    assert.equal(User.properties.joinedAt.type, Date);
    assert.equal(User.properties.age.type, Number);
    assert.equal(User.properties.address.type, Address);

    var json = User.toJSON();
    assert.equal(json.name, 'User');
    assert.equal(json.properties.name.type, 'String');
    assert.equal(json.properties.bio.type, 'Text');
    assert.equal(json.properties.approved.type, 'Boolean');
    assert.equal(json.properties.joinedAt.type, 'Date');
    assert.equal(json.properties.age.type, 'Number');

    assert.equal(json.properties.address.type, 'Address');

    done();

  });

  it('should be able to define referencing models by name', function(done) {
    var modelBuilder = new ModelBuilder();

    var Address = modelBuilder.define('Address', {
      street: String,
      city: String,
      zipCode: String,
      state: String,
    });
    var User = new ModelDefinition(modelBuilder, 'User', {
      name: String,
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: Number,
      address: 'Address',

    });

    User.build();
    assert.equal(User.properties.name.type, String);
    assert.equal(User.properties.bio.type, ModelBuilder.Text);
    assert.equal(User.properties.approved.type, Boolean);
    assert.equal(User.properties.joinedAt.type, Date);
    assert.equal(User.properties.age.type, Number);
    assert.equal(User.properties.address.type, Address);

    var json = User.toJSON();
    assert.equal(json.name, 'User');
    assert.equal(json.properties.name.type, 'String');
    assert.equal(json.properties.bio.type, 'Text');
    assert.equal(json.properties.approved.type, 'Boolean');
    assert.equal(json.properties.joinedAt.type, 'Date');
    assert.equal(json.properties.age.type, 'Number');

    assert.equal(json.properties.address.type, 'Address');

    done();

  });

  it('should report correct id names', function(done) {
    var modelBuilder = new ModelBuilder();

    var User = new ModelDefinition(modelBuilder, 'User', {
      userId: { type: String, id: true },
      name: 'string',
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: 'number',
    });

    assert.equal(User.idName(), 'userId');
    assert.deepEqual(User.idNames(), ['userId']);
    done();
  });

  it('should sort id properties by its index', function() {
    var modelBuilder = new ModelBuilder();

    var User = new ModelDefinition(modelBuilder, 'User', {
      userId: { type: String, id: 2 },
      userType: { type: String, id: 1 },
      name: 'string',
      bio: ModelBuilder.Text,
      approved: Boolean,
      joinedAt: Date,
      age: 'number',
    });

    var ids = User.ids();
    assert.ok(Array.isArray(ids));
    assert.equal(ids.length, 2);
    assert.equal(ids[0].id, 1);
    assert.equal(ids[0].name, 'userType');
    assert.equal(ids[1].id, 2);
    assert.equal(ids[1].name, 'userId');
  });

  it('should report correct table/column names', function(done) {
    var modelBuilder = new ModelBuilder();

    var User = new ModelDefinition(modelBuilder, 'User', {
      userId: { type: String, id: true, oracle: { column: 'ID' }},
      name: 'string',
    }, { oracle: { table: 'USER' }});

    assert.equal(User.tableName('oracle'), 'USER');
    assert.equal(User.tableName('mysql'), 'User');
    assert.equal(User.columnName('oracle', 'userId'), 'ID');
    assert.equal(User.columnName('mysql', 'userId'), 'userId');
    done();
  });

  it('should inherit prototype using option.base', function() {
    var modelBuilder = memory.modelBuilder;
    var parent = memory.createModel('parent', {}, {
      relations: {
        children: {
          type: 'hasMany',
          model: 'anotherChild',
        },
      },
    });
    var baseChild = modelBuilder.define('baseChild');
    baseChild.attachTo(memory);
    // the name of this must begin with a letter < b
    // for this test to fail
    var anotherChild = baseChild.extend('anotherChild');

    assert(anotherChild.prototype instanceof baseChild);
  });

  it('should ignore inherited options.base', function() {
    var modelBuilder = memory.modelBuilder;
    var base = modelBuilder.define('base');
    var child = base.extend('child', {}, { base: 'base' });
    var grandChild = child.extend('grand-child');
    assert.equal('child', grandChild.base.modelName);
    assert(grandChild.prototype instanceof child);
  });

  it('should ignore inherited options.super', function() {
    var modelBuilder = memory.modelBuilder;
    var base = modelBuilder.define('base');
    var child = base.extend('child', {}, { super: 'base' });
    var grandChild = child.extend('grand-child');
    assert.equal('child', grandChild.base.modelName);
    assert(grandChild.prototype instanceof child);
  });

  it('should serialize protected properties into JSON', function() {
    var modelBuilder = memory.modelBuilder;
    var ProtectedModel = memory.createModel('protected', {}, {
      protected: ['protectedProperty'],
    });
    var pm = new ProtectedModel({
      id: 1, foo: 'bar', protectedProperty: 'protected',
    });
    var serialized = pm.toJSON();
    assert.deepEqual(serialized, {
      id: 1, foo: 'bar', protectedProperty: 'protected',
    });
  });

  it('should not serialize protected properties of nested models into JSON', function(done) {
    var modelBuilder = memory.modelBuilder;
    var Parent = memory.createModel('parent');
    var Child = memory.createModel('child', {}, { protected: ['protectedProperty'] });
    Parent.hasMany(Child);
    Parent.create({
      name: 'parent',
    }, function(err, parent) {
      parent.children.create({
        name: 'child',
        protectedProperty: 'protectedValue',
      }, function(err, child) {
        Parent.find({ include: 'children' }, function(err, parents) {
          var serialized = parents[0].toJSON();
          var child = serialized.children[0];
          assert.equal(child.name, 'child');
          assert.notEqual(child.protectedProperty, 'protectedValue');
          done();
        });
      });
    });
  });

  it('should not serialize hidden properties into JSON', function() {
    var modelBuilder = memory.modelBuilder;
    var HiddenModel = memory.createModel('hidden', {}, {
      hidden: ['secret'],
    });
    var hm = new HiddenModel({
      id: 1,
      foo: 'bar',
      secret: 'secret',
    });
    var serialized = hm.toJSON();
    assert.deepEqual(serialized, {
      id: 1,
      foo: 'bar',
    });
  });

  it('should not serialize hidden properties of nested models into JSON', function(done) {
    var modelBuilder = memory.modelBuilder;
    var Parent = memory.createModel('parent');
    var Child = memory.createModel('child', {}, { hidden: ['secret'] });
    Parent.hasMany(Child);
    Parent.create({
      name: 'parent',
    }, function(err, parent) {
      parent.children.create({
        name: 'child',
        secret: 'secret',
      }, function(err, child) {
        Parent.find({ include: 'children' }, function(err, parents) {
          var serialized = parents[0].toJSON();
          var child = serialized.children[0];
          assert.equal(child.name, 'child');
          assert.notEqual(child.secret, 'secret');
          done();
        });
      });
    });
  });

  it('should throw error for property names containing dot', function() {
    (function() { memory.createModel('Dotted', { 'dot.name': String }); })
      .should
      .throw(/dot\(s\).*Dotted.*dot\.name/);
  });

  it('should report deprecation warning for property named constructor', function() {
    var message = 'deprecation not reported';
    process.once('deprecation', function(err) { message = err.message; });

    memory.createModel('Ctor', { 'constructor': String });

    message.should.match(/Property name should not be "constructor" in Model: Ctor/);
  });

  it('should throw error for dynamic property names containing dot',
    function(done) {
      var Model = memory.createModel('DynamicDotted');
      Model.create({ 'dot.name': 'dot.value' }, function(err) {
        err.should.be.instanceOf(Error);
        err.message.should.match(/dot\(s\).*DynamicDotted.*dot\.name/);
        done();
      });
    });

  it('should throw error for dynamic property named constructor', function(done) {
    var Model = memory.createModel('DynamicCtor');
    Model.create({ 'constructor': 'myCtor' }, function(err) {
      assert.equal(err.message, 'Property name "constructor" is not allowed in DynamicCtor data');
      done();
    });
  });

  it('should support "array" type shortcut', function() {
    var Model = memory.createModel('TwoArrays', {
      regular: Array,
      sugar: 'array',
    });

    var props = Model.definition.properties;
    props.regular.type.should.equal(props.sugar.type);
  });

  context('hasPK', function() {
    context('with primary key defined', function() {
      var Todo;
      before(function prepModel() {
        Todo = new ModelDefinition(new ModelBuilder(), 'Todo', {
          content: 'string',
        });
        Todo.defineProperty('id', {
          type: 'number',
          id: true,
        });
        Todo.build();
      });

      it('should return true', function() {
        Todo.hasPK().should.be.ok;
      });
    });

    context('without primary key defined', function() {
      var Todo;
      before(function prepModel() {
        Todo = new ModelDefinition(new ModelBuilder(), 'Todo', {
          content: 'string',
        });
        Todo.build();
      });

      it('should return false', function() {
        Todo.hasPK().should.not.be.ok;
      });
    });
  });
});