@mysql/xdevapi/test/unit/DevAPI/SortExprStr.js

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

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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 test doubles
let SortExprStr = require('../../../lib/DevAPI/SortExprStr');

describe('SortExprStr informal type', () => {
    let ExprParser, parseInDocumentMode, parseInTableMode;

    beforeEach('replace dependencies with test doubles', () => {
        ExprParser = td.replace('../../../lib/ExprParser');

        parseInDocumentMode = td.function();
        parseInTableMode = td.function();

        td.when(ExprParser({ type: ExprParser.Type.SORT_EXPR })).thenReturn({ parse: parseInDocumentMode });
        td.when(ExprParser({ mode: ExprParser.Mode.TABLE, type: ExprParser.Type.SORT_EXPR })).thenReturn({ parse: parseInTableMode });

        // reload module with the replacements
        SortExprStr = require('../../../lib/DevAPI/SortExprStr');
    });

    context('getValue()', () => {
        it('parses the value using the SorExpr parser in document mode by default', () => {
            const sortExpr = 'foo';
            const expected = 'bar';

            td.when(parseInDocumentMode(sortExpr)).thenReturn(expected);

            expect(SortExprStr({ value: sortExpr }).getValue()).to.equal(expected);
            expect(td.explain(parseInTableMode).callCount).to.equal(0);
        });

        it('parses the value using the SorExpr parser in table mode when specified', () => {
            const dataModel = ExprParser.Mode.TABLE;
            const sortExpr = 'bar';
            const expected = 'baz';

            td.when(parseInTableMode(sortExpr)).thenReturn(expected);

            expect(SortExprStr({ dataModel, value: sortExpr }).getValue()).to.equal(expected);
            expect(td.explain(parseInDocumentMode).callCount).to.equal(0);
        });
    });
});