@mysql/xdevapi/test/unit/Protocol/Wrappers/Messages/Crud/Column.js

MySQL Connector/Node.js - A Node.js driver for MySQL using the X Protocol and X DevAPI.

/*
 * Copyright (c) 2020, 2022, Oracle and/or its affiliates.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2.0, as
 * published by the Free Software Foundation.
 *
 * This program is also distributed with certain software (including
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 * as designated in a particular file or component or in included license
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 */

'use strict';

/* eslint-env node, mocha */

const expect = require('chai').expect;
const td = require('testdouble');

// subject under test needs to be reloaded with replacement fakes
let Column = require('../../../../../../lib/Protocol/Wrappers/Messages/Crud/Column');

describe('Mysqlx.Crud.Column wrapper', () => {
    let CrudStub;

    beforeEach('replace dependencies with test doubles', () => {
        CrudStub = td.replace('../../../../../../lib/Protocol/Stubs/mysqlx_crud_pb');
        // reload module with the replacements
        Column = require('../../../../../../lib/Protocol/Wrappers/Messages/Crud/Column');
    });

    afterEach('restore original dependencies', () => {
        td.reset();
    });

    context('class methods', () => {
        context('create()', () => {
            let wraps;

            beforeEach('replace dependencies with test doubles', () => {
                wraps = td.replace('../../../../../../lib/Protocol/Wrappers/Traits/Wraps');
                // reload module with the replacements
                Column = require('../../../../../../lib/Protocol/Wrappers/Messages/Crud/Column');
            });

            it('creates Mysqlx.Crud.Column wrap instance with a given name', () => {
                const name = 'foo';
                const proto = new CrudStub.Column();
                const protoValue = 'bar';

                td.when(wraps(proto)).thenReturn({ valueOf: () => protoValue });

                expect(Column.create(name).valueOf()).to.deep.equal(protoValue);
                expect(td.explain(proto.setName).callCount).to.equal(1);
                expect(td.explain(proto.setName).calls[0].args[0]).to.equal(name);
            });
        });
    });

    context('instance methods', () => {
        context('toJSON()', () => {
            it('returns a textual representation of a Mysqlx.Crud.Column message', () => {
                const proto = new CrudStub.Column();
                const expected = { name: 'foo' };

                td.when(proto.getName()).thenReturn(expected.name);

                expect(Column(proto).toJSON()).to.deep.equal(expected);
            });
        });

        context('valueOf()', () => {
            let wraps;

            beforeEach('replace dependencies with test doubles', () => {
                wraps = td.replace('../../../../../../lib/Protocol/Wrappers/Traits/Wraps');
                // reload module with the replacements
                Column = require('../../../../../../lib/Protocol/Wrappers/Messages/Crud/Column');
            });

            it('returns the underlying protobuf stub instance', () => {
                const proto = new CrudStub.Column();
                const expected = 'foo';

                td.when(wraps(proto)).thenReturn({ valueOf: () => expected });

                expect(Column(proto).valueOf()).to.equal(expected);
            });
        });
    });
});