add guide for run tests on built UI

msa/black-box-tests/README.md

@@ -42,6 +42,8 @@ As result, in REPOSITORY column, next images should be present:
 
         mvn clean install -DblackBoxTests.skip=false -Dsuite=all 
 
-
-
-
+### To run a separate test manually on a built UI:
+1. Add the black-box-tests module in the [pom.xml](../pom.xml)
+2. Add Vm Option "-DrunLocal=true -Dtb.baseUiUrl=http://localhost:4200/" in Run -> Edit Configuration -> Edit Configuration Templates -> TestNG
+3. Go to the test class you need in the [UI tests directory](../black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests) and run the test in it 
+or go to the [resources](../black-box-tests/src/test/resources) and run test suite you need

msa/black-box-tests/src/test/java/org/thingsboard/server/msa/TestProperties.java

@@ -36,33 +36,20 @@ public class TestProperties {
         if (instance.isActive()) {
             return HTTPS_URL;
         }
-        return getProperties().getProperty("tb.baseUrl");
+        return System.getProperty("tb.baseUrl", "http://localhost:8080");
     }
 
     public static String getBaseUiUrl() {
         if (instance.isActive()) {
             return "https://host.docker.internal";
         }
-        return getProperties().getProperty("tb.baseUrl");
+        return System.getProperty("tb.baseUiUrl", "http://localhost:8080");
     }
 
     public static String getWebSocketUrl() {
         if (instance.isActive()) {
             return WSS_URL;
         }
-        return getProperties().getProperty("tb.wsUrl");
+        return System.getProperty("tb.wsUrl", "ws://localhost:8080");
     }
-
-    private static Properties getProperties() {
-        if (properties == null) {
-            try (InputStream input = TestProperties.class.getClassLoader().getResourceAsStream("config.properties")) {
-                properties = new Properties();
-                properties.load(input);
-            } catch (IOException ex) {
-                log.error("Exception while reading test properties " + ex.getMessage());
-            }
-        }
-        return properties;
-    }
-
 }

msa/black-box-tests/src/test/resources/config.properties

@@ -1,2 +0,0 @@
-tb.baseUrl=http://localhost:8080
-tb.wsUrl=ws://localhost:8080