fix(e2e): migrate predams test to WebdriverIO

refs #618

e2e/prebarrages-results.e2e-spec.ts

 import { ListPage } from "./list.po";
 import { CalculatorPage } from "./calculator.po";
 import { Navbar } from "./navbar.po";
-import { browser, by, element } from "protractor";
-import { AppPage } from "./app.po";
-import { SideNav } from "./sidenav.po";
 import { PreferencesPage } from "./preferences.po";
-import { changeSelectValue, scrollPageToTop } from "./util.po";
+import { browser, $, $$, expect } from '@wdio/globals'
+import { scrollToElement } from "./util.po";
 
 /**
  * Clone calculators
@@ -27,26 +25,31 @@ describe("Prébarrages results - ", () => {
     beforeEach(async () => {
         // disable evil option "empty fields on module creation"
         await prefPage.navigateTo();
+        await browser.pause(200);
         await prefPage.disableEvilEmptyFields();
-        await browser.sleep(200);
+        await browser.pause(200);
     });
 
     it("every module shoud have results", async () => {
         // create prébarrage calculator
         await navBar.clickNewCalculatorButton();
+        await browser.pause(200);
         await listPage.clickMenuEntryForCalcType(30);
+        await browser.pause(200);
 
         // run calculation
-        const calcButton = calcPage.getCalculateButton();
+        const calcButton = await calcPage.getCalculateButton();
         await calcButton.click();
-        await browser.sleep(200);
+        await browser.pause(200);
 
-        const nodes = element.all(by.css("g.nodes > g"));
-        const nb = await nodes.count();
+        const nodes = await $$("g.nodes > g");
+        const nb = nodes.length;
         for (let n = 0; n < nb; n++) {
-            const node = nodes.get(n);
+            const node = nodes[n];
+            await scrollToElement(node);
+            await browser.pause(100);
             await node.click();
-            await browser.sleep(200);
+            await browser.pause(200);
 
             // check that result is not empty
             const hasResults = await calcPage.hasResults();