add setRuleChain()

msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/base/AbstractDriverBaseTest.java

@@ -207,4 +207,11 @@ abstract public class AbstractDriverBaseTest extends AbstractContainerTest {
             ruleChains.forEach(rc -> testRestClient.deleteRuleChain(rc.getId()));
         }
     }
+
+    public void setRootRuleChain(String ruleChainName) {
+        List<RuleChain> ruleChains = getRuleChainsByName(ruleChainName);
+        if (!ruleChains.isEmpty()) {
+            testRestClient.setRootRuleChain(ruleChains.stream().findFirst().get().getId());
+        }
+    }
 }

msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests/rulechainssmoke/MakeRuleChainRootTest.java

@@ -27,7 +27,7 @@ public class MakeRuleChainRootTest extends AbstractRuleChainTest {
 
     @AfterMethod
     public void makeRoot() {
-        testRestClient.setRootRuleChain(getRuleChainByName("Root Rule Chain").getId());
+        setRootRuleChain("Root Rule Chain");
     }
 
     @Test(priority = 10, groups = "smoke")

msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests/rulechainssmoke/OpenRuleChainTest.java

@@ -39,7 +39,6 @@ public class OpenRuleChainTest extends AbstractRuleChainTest {
         ruleChainsPage.entity(ruleChainName).click();
         openRuleChainPage.setHeadName();
 
-        assertThat(ruleChain).as("Rule chain created").isNotNull();
         assertThat(urlContains(ruleChain.getUuidId().toString())).as("URL contains rule chain's ID").isTrue();
         assertIsDisplayed(openRuleChainPage.headRuleChainName());
         assertIsDisplayed(openRuleChainPage.inputNode());