toMatch not working with page object in Protractor

Question

I'm fairly new to Jasmine, and I'm using Protractor with page object. Here's the page object as it appears, complete with function called by the spec:

'use strict';

module.exports = {
    structure: {
        cliButton: element(by.id('cliSubmit')),
        cliInput: element(by.id('commandLineInterface')),
        casDrawButton: element(by.id('casdrawTrigger')),
        benzeneIcon: element(by.id('cdBenzene')),
        casDrawCanvas: element(by.id('cdCanvasContainer')),
        saveUploadButton: element(by.id('cdOK')),
        lastCommandResponse: element(by.id('commandResponse3')),
        myFilesLink: element(by.id('my-stn-toggle')),
        structuresLink: element(by.id('structureOptionsToggle')),
        firstStructureName: element(by.id('structureNameLabel-0')),
        returnHome: element(by.className('return-link')),
        importStructure: element(by.id('importStructure')),
        importBrowse: element(by.id('structureImportBrowse')),
        importOK: element(by.id('structureImportModalOk')),
        editStructureName: element(by.id('editStructureNameSave-0')),
        structureDateTime: element(by.id('structureDate-0')),
        structureSnippet: element(by.id('structureImage-0')),
        firstEditButton: element(by.id('editStructure-0')),
        firstUploadButton: element(by.id('uploadStructure-0')),
        firstActionsButton: element(by.id('scriptActions-0')),
        firstDeleteButton: element(by.id('confirmDelete-0')),
        selectAll: element(by.id('selectAll')),
        deleteAll: element(by.id('deleteStructures')),
        selectCheckboxes: element(by.xpath("//*[contains(@id,'selectStructure')]"))
    },

    casDrawSteps: function () {
        var structure = this.structure;
        var today = new Date();
        var year = today.getFullYear();

        structure.cliInput.sendKeys('fil reg');
        structure.cliButton.click();
        structure.casDrawButton.click();
        browser.sleep(6000);
        structure.benzeneIcon.isEnabled();
        structure.casDrawCanvas.isEnabled();
        structure.benzeneIcon.click();
        structure.casDrawCanvas.click();
        structure.saveUploadButton.click();
        structure.cliButton.isEnabled();
        browser.sleep(6000);
        expect(structure.lastCommandResponse.getText()).toContain('STRUCTURE UPLOADED');
        structure.myFilesLink.click();
        structure.structuresLink.click();
        expect(structure.firstStructureName.getText()).toMatch(year + '_' + /\d*/ + '_Structure');
        structure.returnHome.click();
        structure.cliButton.isEnabled()

    },
};

The problem is that the toMatch after the getText is not matching the regex, and according to all regex references I can find, it should. I have jasmine-matchers installed, so I'm uncertain why this is happening. Here's the stack I receive when I run the spec with this function:

Failures:
1) Protractor STNext Smoke Test - Structure: CASDraw creates a structure in CasDraw and verifies the response in Messenger
  Message:
    Expected '2017_0013_Structure' to match '2017_/\d*/_Structure'.
  Stack:
    Error: Failed expectation
        at Object.casDrawSteps (/home/heb29/Desktop/casnc/repos/stn-kraken-qa/spec/pages/structure_page.js:50:56)
        at UserContext.<anonymous> (/home/heb29/Desktop/casnc/repos/stn-kraken-qa/spec/smoke_spec.js:93:23)
        at /usr/local/lib/node_modules/protractor/node_modules/jasminewd2/index.js:112:25
        at new ManagedPromise (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:1067:7)
        at ControlFlow.promise (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2396:12)
        at schedulerExecute (/usr/local/lib/node_modules/protractor/node_modules/jasminewd2/index.js:95:18)
        at TaskQueue.execute_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2970:14)
        at TaskQueue.executeNext_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2953:27)
        at asyncRun (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2860:25)

What am I missing?

Answer 1

You need to concatenate regular expressions and regular strings correctly:

var text = structure.firstStructureName.getText();
expect(text).toMatch(year + /_\d*_Structure/.source);