Make React related integration tests work

[0pdd]

The puzzle 1057-d01039f1 from #1057 has to be resolved:

mystamps/pom.xml

Line 1061 in 6b40dca

<!-- @todo #1057 Make React related integration tests work -->

The puzzle was created by @php-coder on 23-Jun-19.

[php-coder]

At this moment, they fail with:

Import a series sale with invalid url                                 | FAIL |
ReferenceError: "Headers" is not defined. (http://127.0.0.1:8080/public/react-dom/16.8.6/umd/react-dom.production.min.js#17)

Most likely, this will be fixed with a new version of Selenium and htmlunit (see #1001)

[php-coder]

Most likely, this will be fixed with a new version of Selenium and htmlunit (see #1001)

No, it wasn't or at least not fully.

ReferenceError: "Headers" is not defined.

This one can be workarounded with

--- src/main/frontend/src/components/SeriesSaleImportForm.js
+++ src/main/frontend/src/components/SeriesSaleImportForm.js
@@ -40,9 +40,10 @@ class SeriesSaleImportForm extends React.Component {
                        validationErrors: []
                });

-               const headers = new Headers();
-               headers.set('Content-Type', 'application/json; charset=UTF-8');
-               headers.set(this.props.csrfHeaderName, this.props.csrfTokenValue);
+               const headers = new Headers([
+                       [ 'Content-Type', 'application/json; charset=UTF-8' ],
+                       [ this.props.csrfHeaderName, this.props.csrfTokenValue ]
+               ]);

                const request = new Request(
                        this.props.url,

But after that there will be another error: ReferenceError: "fetch" is not defined I've submited HtmlUnit/htmlunit#78 for that.

[php-coder]

We can try to use axios instead or wait until #966 will be solved.