Resolve "Solveur: le paramètre recherché n'est pas conservé"

Closes #555 (closed)

e2e/solveur.e2e-spec.ts

@@ -170,4 +170,20 @@ describe("Solveur - ", () => {
         // check "search parameter" value has not changed
         expect(await calcPage.getSelectValueText(sel)).toEqual(selText);
     });
+    
+    it("check solver searched parameter is set to 'bottom slope'", async () => {
+        // open "canal critical slope" example
+        const examples = await element.all(by.css("#examples-list .load-example"));
+        await examples[3].click();
+        await browser.sleep(500);
+
+        // select solver tab
+        await navbar.clickCalculatorTab(2);
+        await browser.sleep(500);
+
+        // check selected searched parameter text
+        const sel = calcPage.getSelectById("select_searched_param");
+        const selText = await calcPage.getSelectValueText(sel);
+        expect(selText).toEqual("If - Pente du fond (Sec. param.)");
+    });
 });