test(e2e): check calculate button is disabled when a parallel structures input is empty

refs #616

e2e/calculate-button-validation.e2e-spec.ts

@@ -138,4 +138,42 @@ describe("Calculate button - ", () => {
             expect(await upstream.getAttribute('class')).not.toContain("node-error");
         });
     });
+
+    async function checkCalculateButtonValidity(calcType: number) {
+        // open calculator
+        await navBar.clickNewCalculatorButton();
+        await listPage.clickMenuEntryForCalcType(calcType);
+        await browser.sleep(200);
+
+        // for each input, set empty and check calculate button is not active
+
+        const inputs = calcPage.getParamInputs();
+        const ninp = await inputs.count();
+        for (let i = 0; i < ninp; i++) {
+            const inp = inputs.get(i);
+            // set input to fixed mode
+            await calcPage.setParamMode(inp, "fix");
+            await browser.sleep(100);
+
+            // clear input
+            await calcPage.clearInput(inp);
+            await browser.sleep(10);
+
+            // check calculate button is disabled
+            await calcPage.checkCalcButtonEnabled(false);
+            await browser.sleep(100);
+
+            // refill input
+            await inp.sendKeys("1");
+            await browser.sleep(100);
+        }
+    }
+
+    it("check status for various calculators", async () => {
+        // "parallel structures" calculator
+        await checkCalculateButtonValidity(8);
+
+        // "fish ladder : cross walls" calculator
+        await checkCalculateButtonValidity(10);
+    });
 });