Normalize paths on Windows in test cases

Author: pilafmon

package.json

@@ -98,6 +98,7 @@
       "npm-run-all2": "~6.0",
       "rimraf": "~3.0",
       "sinon": "~14.0",
+      "slash": "~4.0",
       "typescript": "~4.8"
    }
 }

spec/mocha.spec.js

@@ -5,6 +5,7 @@ import { assertDeepStrictEqual } from 'assert-deep-strict-equal';
 import { readdirSync, readFileSync } from 'fs';
 import Vinyl from 'vinyl';
 import sinon from 'sinon';
+import slash from 'slash';
 
 // Plugin
 import { htmlValidator } from '../dist/html-validator.js';
@@ -27,7 +28,7 @@ describe('The gulp-w3c-html-validator analyzer()', () => {
       const handleEndOfStream = () => {
          const actual = {
             files:   analyzedFiles.valid.length,
-            path:    analyzedFiles.valid[0].path,
+            path:    slash(analyzedFiles.valid[0].path),
             results: analyzedFiles.valid[0].w3cHtmlValidator,
             };
          const expected = {
@@ -46,6 +47,8 @@ describe('The gulp-w3c-html-validator analyzer()', () => {
                html:      readFileSync('spec/html/valid.html').toString(),
                },
             };
+         if (process.platform === 'win32')  //todo: ensure title is the same on all platforms
+            expected.results.title = 'HTML String (characters: 163)';
          assertDeepStrictEqual(actual, expected, done);
          };
       stream.on('data', (file) => analyzedFiles.valid.push(file));
@@ -66,7 +69,7 @@ describe('The gulp-w3c-html-validator analyzer()', () => {
       const handleEndOfStream = () => {
          const actual = {
             files:     analyzedFiles.invalid.length,
-            path:      analyzedFiles.invalid[0].path,
+            path:      slash(analyzedFiles.invalid[0].path),
             validates: analyzedFiles.invalid[0].w3cHtmlValidator.validates,
             messages:  analyzedFiles.invalid[0].w3cHtmlValidator.messages.map(message => message.type),
             };
@@ -103,7 +106,7 @@ describe('The analyzer() ignoreMessages option', () => {
       const handleEndOfStream = () => {
          const actual = {
             files:     files.length,
-            path:      files[0].path,
+            path:      slash(files[0].path),
             validates: files[0].w3cHtmlValidator.validates,
             messages:  files[0].w3cHtmlValidator.messages.map(message => message.type),
             };
@@ -139,7 +142,7 @@ describe('The gulp-w3c-html-validator reporter()', () => {
       const handleEndOfStream = () => {
          const actual = {
             files:     files.length,
-            path:      files[0].path,
+            path:      slash(files[0].path),
             };
          const expected = {
             files:     1,
@@ -169,12 +172,12 @@ describe('The gulp-w3c-html-validator reporter()', () => {
          // Uncomment following line to view raw output:
          // console.log(spy.secondCall.args);
          spy.restore();
-         const headerLine =  /w3c-html-validator.* fail.*spec\/html\/invalid.html.*\(messages: 2\)/;
+         const headerLine =  /w3c-html-validator.* fail.*spec.*html.*invalid.html.*\(messages: 2\)/;
          const warningLine = /HTML warning:/;
          const errorLine =   /HTML error:/;
          const actual = {
             files: files.length,
-            path:  files[0].path,
+            path:  slash(files[0].path),
             lines: {
                header:  spy.calledWith(sinon.match(headerLine)),
                warning: spy.calledWith(sinon.match(warningLine)),