js-data-projector/src/projection-schema-registry.spec.js

import {expect} from 'chai';
import {ProjectionSchemaRegistry} from './projection-schema-registry.js';

describe('ProjectionSchemaRegistry', function () {
  describe('defineSchema', function () {
    it('should validate the given definition', function () {
      const S = new ProjectionSchemaRegistry();
      const throwable = () => S.defineSchema({});
      expect(throwable).to.throw(
        'Definition option "name" must be a non-empty String, ' +
          'but undefined was given.',
      );
    });

    it('should register the given definition', function () {
      const def = {name: 'mySchema', schema: {}};
      const S = new ProjectionSchemaRegistry();
      S.defineSchema(def);
      const res = S.getDefinition(def.name);
      expect(res).to.be.eql(def);
    });

    it('should throw an error if the schema name is already registered', function () {
      const S = new ProjectionSchemaRegistry();
      const def = {name: 'mySchema', schema: {}};
      S.defineSchema(def);
      const throwable = () => S.defineSchema(def);
      expect(throwable).to.throw(
        'Projection schema "mySchema" is already registered.',
      );
    });
  });

  describe('hasSchema', function () {
    it('should return true when the given name is registered', function () {
      const S = new ProjectionSchemaRegistry();
      expect(S.hasSchema('mySchema')).to.be.false;
      S.defineSchema({name: 'mySchema', schema: {}});
      expect(S.hasSchema('mySchema')).to.be.true;
    });
  });

  describe('getSchema', function () {
    it('should throw an error if the given name is not registered', function () {
      const S = new ProjectionSchemaRegistry();
      const throwable = () => S.getSchema('mySchema');
      expect(throwable).to.throw('Projection schema "mySchema" is not found.');
    });

    it('should return a registered schema by the given name', function () {
      const def = {name: 'mySchema', schema: {foo: true, bar: false}};
      const S = new ProjectionSchemaRegistry();
      S.defineSchema(def);
      const res = S.getSchema(def.name);
      expect(res).to.be.eql(def.schema);
    });
  });

  describe('getDefinition', function () {
    it('should throw an error if the given name is not registered', function () {
      const S = new ProjectionSchemaRegistry();
      const throwable = () => S.getDefinition('mySchema');
      expect(throwable).to.throw('Schema definition "mySchema" is not found.');
    });

    it('should return a registered definition by the given name', function () {
      const def = {name: 'mySchema', schema: {}};
      const S = new ProjectionSchemaRegistry();
      S.defineSchema(def);
      const res = S.getDefinition(def.name);
      expect(res).to.be.eql(def);
    });
  });
});