test(client): reg exp progress test

lib/options.json

@@ -425,7 +425,7 @@
       "pfx": "should be {String|Buffer} (https://webpack.js.org/configuration/dev-server/#devserverpfx)",
       "pfxPassphrase": "should be {String} (https://webpack.js.org/configuration/dev-server/#devserverpfxpassphrase)",
       "port": "should be {Number|String|Null} (https://webpack.js.org/configuration/dev-server/#devserverport)",
-      "profile": "should be {Boolean}",
+      "profile": "should be {Boolean} (https://webpack.js.org/configuration/dev-server/#devserverprofile)",
       "progress": "should be {Boolean} (https://webpack.js.org/configuration/dev-server/#devserverprogress---cli-only)",
       "proxy": "should be {Object|Array} (https://webpack.js.org/configuration/dev-server/#devserverproxy)",
       "public": "should be {String} (https://webpack.js.org/configuration/dev-server/#devserverpublic)",

test/e2e/Progress.test.js

@@ -48,10 +48,16 @@ describe('client progress', () => {
             );
             page.waitFor(10000).then(() => {
               browser.close().then(() => {
-                expect(res).toMatchSnapshot();
+                // example output that would match:
+                // "[WDS] 40% - building (0/1 modules)."
+                const testExp = /\[WDS\] [0-9]{1,3}% - building \([0-1]\/1 modules\)\./;
+                const match = res.find((line) => {
+                  return testExp.test(line);
+                });
+                // eslint-disable-next-line no-undefined
+                expect(match).not.toEqual(undefined);
                 done();
               });
-              browser.close().then(done);
             });
           });