[#207]: fix(api): clean up

README.md

@@ -156,6 +156,7 @@ For example, if you want to use an environment variable to set the `name` parame
 |`KAFKA_CLUSTERS_0_NAME` | Cluster name
 |`KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS` 	|Address where to connect 
 |`KAFKA_CLUSTERS_0_ZOOKEEPER` 	| Zookeper service address 
+|`KAFKA_CLUSTERS_0_KSQLDBSERVER` 	| KSQL DB server address 
 |`KAFKA_CLUSTERS_0_PROPERTIES_SECURITY_PROTOCOL` 	|Security protocol to connect to the brokers. For SSL connection use "SSL", for plaintext connection don't set this environment variable
 |`KAFKA_CLUSTERS_0_SCHEMAREGISTRY`   	|SchemaRegistry's address
 |`KAFKA_CLUSTERS_0_SCHEMANAMETEMPLATE`  |How keys are saved to schemaRegistry

kafka-ui-api/src/main/java/com/provectus/kafka/ui/client/KsqlClient.java

@@ -4,7 +4,7 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.provectus.kafka.ui.exception.UnprocessableEntityException;
 import com.provectus.kafka.ui.model.KsqlCommandResponse;
-import com.provectus.kafka.ui.strategy.ksql.statement.KsqlStatementStrategy;
+import com.provectus.kafka.ui.strategy.ksql.statement.BaseStrategy;
 import lombok.RequiredArgsConstructor;
 import lombok.SneakyThrows;
 import lombok.extern.log4j.Log4j2;
@@ -23,7 +23,7 @@ public class KsqlClient {
   private final WebClient webClient;
   private final ObjectMapper mapper;
 
-  public Mono<KsqlCommandResponse> execute(KsqlStatementStrategy ksqlStatement) {
+  public Mono<KsqlCommandResponse> execute(BaseStrategy ksqlStatement) {
     return webClient.post()
         .uri(ksqlStatement.getUri())
         .accept(new MediaType("application", "vnd.ksql.v1+json"))

kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KsqlService.java

@@ -7,7 +7,7 @@ import com.provectus.kafka.ui.exception.UnprocessableEntityException;
 import com.provectus.kafka.ui.model.KafkaCluster;
 import com.provectus.kafka.ui.model.KsqlCommand;
 import com.provectus.kafka.ui.model.KsqlCommandResponse;
-import com.provectus.kafka.ui.strategy.ksql.statement.KsqlStatementStrategy;
+import com.provectus.kafka.ui.strategy.ksql.statement.BaseStrategy;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -18,7 +18,7 @@ import reactor.core.publisher.Mono;
 public class KsqlService {
   private final KsqlClient ksqlClient;
   private final ClustersStorage clustersStorage;
-  private final List<KsqlStatementStrategy> ksqlStatementStrategies;
+  private final List<BaseStrategy> ksqlStatementStrategies;
 
   public Mono<KsqlCommandResponse> executeKsqlCommand(String clusterName,
                                                       Mono<KsqlCommand> ksqlCommand) {
@@ -36,7 +36,7 @@ public class KsqlService {
         .flatMap(ksqlClient::execute);
   }
 
-  private Mono<KsqlStatementStrategy> getStatementStrategyForKsqlCommand(
+  private Mono<BaseStrategy> getStatementStrategyForKsqlCommand(
       Mono<KsqlCommand> ksqlCommand) {
     return ksqlCommand
         .map(command -> ksqlStatementStrategies.stream()

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/BaseStrategy.java

@@ -15,7 +15,10 @@ import java.util.stream.IntStream;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
-public abstract class KsqlStatementStrategy {
+public abstract class BaseStrategy {
+  protected static final String ksqlRequestPath = "/ksql";
+  protected static final String queryRequestPath = "/query";
+  private static final String mappingExceptionMessage = "KSQL DB response mapping error";
   protected String host = null;
   protected KsqlCommand ksqlCommand = null;
 
@@ -23,14 +26,14 @@ public abstract class KsqlStatementStrategy {
     if (this.host != null) {
       return this.host + this.getRequestPath();
     }
-    return null;
+    throw new UnprocessableEntityException("Strategy doesn't have host");
   }
 
   public boolean test(String sql) {
     return sql.trim().toLowerCase().matches(getTestRegExp());
   }
 
-  public KsqlStatementStrategy host(String host) {
+  public BaseStrategy host(String host) {
     this.host = host;
     return this;
   }
@@ -39,7 +42,7 @@ public abstract class KsqlStatementStrategy {
     return ksqlCommand;
   }
 
-  public KsqlStatementStrategy ksqlCommand(KsqlCommand ksqlCommand) {
+  public BaseStrategy ksqlCommand(KsqlCommand ksqlCommand) {
     this.ksqlCommand = ksqlCommand;
     return this;
   }
@@ -52,7 +55,7 @@ public abstract class KsqlStatementStrategy {
       Table table = items.isArray() ? getTableFromArray(items) : getTableFromObject(items);
       return commandResponse.data(table);
     }
-    throw new UnprocessableEntityException("KSQL DB response mapping error");
+    throw new UnprocessableEntityException(mappingExceptionMessage);
   }
 
   protected KsqlCommandResponse serializeMessageResponse(JsonNode response, String path) {
@@ -62,7 +65,7 @@ public abstract class KsqlStatementStrategy {
       JsonNode item = first.path(path);
       return commandResponse.message(getMessageFromObject(item));
     }
-    throw new UnprocessableEntityException("KSQL DB response mapping error");
+    throw new UnprocessableEntityException(mappingExceptionMessage);
   }
 
   protected KsqlCommandResponse serializeQueryResponse(JsonNode response) {
@@ -73,7 +76,7 @@ public abstract class KsqlStatementStrategy {
           .rows(getQueryResponseRows(response));
       return commandResponse.data(table);
     }
-    throw new UnprocessableEntityException("KSQL DB response mapping error");
+    throw new UnprocessableEntityException(mappingExceptionMessage);
   }
 
   private List<String> getQueryResponseHeader(JsonNode response) {
@@ -121,7 +124,7 @@ public abstract class KsqlStatementStrategy {
     if (node.isObject() && node.has("message")) {
       return node.get("message").asText();
     }
-    throw new UnprocessableEntityException("KSQL DB response mapping error");
+    throw new UnprocessableEntityException(mappingExceptionMessage);
   }
 
   private List<List<String>> getTableRows(JsonNode node, List<String> keys) {
@@ -137,7 +140,7 @@ public abstract class KsqlStatementStrategy {
     if (node.isArray() && node.size() > 0) {
       return StreamSupport.stream(node.spliterator(), false);
     }
-    throw new UnprocessableEntityException("KSQL DB response mapping error");
+    throw new UnprocessableEntityException(mappingExceptionMessage);
   }
 
   private List<String> getJsonObjectKeys(JsonNode node) {
@@ -146,7 +149,7 @@ public abstract class KsqlStatementStrategy {
           Spliterators.spliteratorUnknownSize(node.fieldNames(), Spliterator.ORDERED), false
       ).collect(Collectors.toList());
     }
-    throw new UnprocessableEntityException("KSQL DB response mapping error");
+    throw new UnprocessableEntityException(mappingExceptionMessage);
   }
 
   private List<String> getJsonObjectValues(JsonNode node) {

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/CreateStrategy.java

@@ -4,11 +4,9 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.provectus.kafka.ui.model.KsqlCommandResponse;
 import org.springframework.stereotype.Component;
 
-
 @Component
-public class CreateStrategy extends KsqlStatementStrategy {
+public class CreateStrategy extends BaseStrategy {
-  private final String requestPath = "/ksql";
+  private static final String responseValueKey = "commandStatus";
-  private final String responseValueKey = "commandStatus";
 
   @Override
   public KsqlCommandResponse serializeResponse(JsonNode response) {
@@ -17,7 +15,7 @@ public class CreateStrategy extends KsqlStatementStrategy {
 
   @Override
   protected String getRequestPath() {
-    return requestPath;
+    return BaseStrategy.ksqlRequestPath;
   }
 
   @Override

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/DescribeStrategy.java

@@ -4,11 +4,9 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.provectus.kafka.ui.model.KsqlCommandResponse;
 import org.springframework.stereotype.Component;
 
-
 @Component
-public class DescribeStrategy extends KsqlStatementStrategy {
+public class DescribeStrategy extends BaseStrategy {
-  private final String requestPath = "/ksql";
+  private static final String responseValueKey = "sourceDescription";
-  private final String responseValueKey = "sourceDescription";
 
   @Override
   public KsqlCommandResponse serializeResponse(JsonNode response) {
@@ -17,7 +15,7 @@ public class DescribeStrategy extends KsqlStatementStrategy {
 
   @Override
   protected String getRequestPath() {
-    return requestPath;
+    return BaseStrategy.ksqlRequestPath;
   }
 
   @Override

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/DropStrategy.java

@@ -4,11 +4,9 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.provectus.kafka.ui.model.KsqlCommandResponse;
 import org.springframework.stereotype.Component;
 
-
 @Component
-public class DropStrategy extends KsqlStatementStrategy {
+public class DropStrategy extends BaseStrategy {
-  private final String requestPath = "/ksql";
+  private static final String responseValueKey = "commandStatus";
-  private final String responseValueKey = "commandStatus";
 
   @Override
   public KsqlCommandResponse serializeResponse(JsonNode response) {
@@ -17,7 +15,7 @@ public class DropStrategy extends KsqlStatementStrategy {
 
   @Override
   protected String getRequestPath() {
-    return requestPath;
+    return BaseStrategy.ksqlRequestPath;
   }
 
   @Override

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/ExplainStrategy.java

@@ -5,9 +5,8 @@ import com.provectus.kafka.ui.model.KsqlCommandResponse;
 import org.springframework.stereotype.Component;
 
 @Component
-public class ExplainStrategy extends KsqlStatementStrategy {
+public class ExplainStrategy extends BaseStrategy {
-  private final String requestPath = "/ksql";
+  private static final String responseValueKey = "queryDescription";
-  private final String responseValueKey = "queryDescription";
 
   @Override
   public KsqlCommandResponse serializeResponse(JsonNode response) {
@@ -16,7 +15,7 @@ public class ExplainStrategy extends KsqlStatementStrategy {
 
   @Override
   protected String getRequestPath() {
-    return requestPath;
+    return BaseStrategy.ksqlRequestPath;
   }
 
   @Override

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/ListStrategy.java

@@ -1,49 +0,0 @@
-package com.provectus.kafka.ui.strategy.ksql.statement;
-
-import com.fasterxml.jackson.databind.JsonNode;
-import com.provectus.kafka.ui.model.KsqlCommandResponse;
-import java.util.List;
-import java.util.Optional;
-import org.springframework.stereotype.Component;
-
-@Component
-public class ListStrategy extends KsqlStatementStrategy {
-  private final String requestPath = "/ksql";
-  private final List<String> statements = List.of("functions", "topics", "streams", "tables");
-  private String responseValueKey = "";
-
-  @Override
-  public KsqlCommandResponse serializeResponse(JsonNode response) {
-    return serializeTableResponse(response, responseValueKey);
-  }
-
-  @Override
-  protected String getRequestPath() {
-    return requestPath;
-  }
-
-  @Override
-  public boolean test(String sql) {
-    Optional<String> statement = statements.stream()
-        .filter(s -> sql.trim().toLowerCase().matches(getTestRegExp(s)))
-        .findFirst();
-    if (statement.isPresent()) {
-      setResponseValueKey(statement.get());
-      return true;
-    }
-    return false;
-  }
-
-  @Override
-  protected String getTestRegExp() {
-    return "";
-  }
-
-  private String getTestRegExp(String key) {
-    return "list " + key + ";";
-  }
-
-  private void setResponseValueKey(String path) {
-    responseValueKey = path;
-  }
-}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/SelectStrategy.java

@@ -5,8 +5,7 @@ import com.provectus.kafka.ui.model.KsqlCommandResponse;
 import org.springframework.stereotype.Component;
 
 @Component
-public class SelectStrategy extends KsqlStatementStrategy {
+public class SelectStrategy extends BaseStrategy {
-  private final String requestPath = "/query";
 
   @Override
   public KsqlCommandResponse serializeResponse(JsonNode response) {
@@ -15,7 +14,7 @@ public class SelectStrategy extends KsqlStatementStrategy {
 
   @Override
   protected String getRequestPath() {
-    return requestPath;
+    return BaseStrategy.queryRequestPath;
   }
 
   @Override

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/ShowStrategy.java

@@ -7,10 +7,11 @@ import java.util.Optional;
 import org.springframework.stereotype.Component;
 
 @Component
-public class ShowStrategy extends KsqlStatementStrategy {
+public class ShowStrategy extends BaseStrategy {
-  private final String requestPath = "/ksql";
+  private final List<String> showStatements =
-  private final List<String> statements =
       List.of("functions", "topics", "streams", "tables", "queries", "properties");
+  private final List<String> listStatements =
+      List.of("functions", "topics", "streams", "tables");
   private String responseValueKey = "";
 
   @Override
@@ -18,15 +19,10 @@ public class ShowStrategy extends KsqlStatementStrategy {
     return serializeTableResponse(response, responseValueKey);
   }
 
-  @Override
-  protected String getRequestPath() {
-    return requestPath;
-  }
-
   @Override
   public boolean test(String sql) {
-    Optional<String> statement = statements.stream()
+    Optional<String> statement = showStatements.stream()
-        .filter(s -> sql.trim().toLowerCase().matches(getTestRegExp(s)))
+        .filter(s -> testSql(sql, getShowRegExp(s)) || testSql(sql, getListRegExp(s)))
         .findFirst();
     if (statement.isPresent()) {
       setResponseValueKey(statement.get());
@@ -35,17 +31,32 @@ public class ShowStrategy extends KsqlStatementStrategy {
     return false;
   }
 
+  @Override
+  protected String getRequestPath() {
+    return BaseStrategy.ksqlRequestPath;
+  }
+
   @Override
   protected String getTestRegExp() {
     return "";
   }
 
-  private String getTestRegExp(String key) {
+  protected String getShowRegExp(String key) {
     return "show " + key + ";";
   }
 
+  protected String getListRegExp(String key) {
+    if (listStatements.contains(key)) {
+      return "list " + key + ";";
+    }
+    return "";
+  }
+
   private void setResponseValueKey(String path) {
     responseValueKey = path;
   }
 
+  private boolean testSql(String sql, String pattern) {
+    return sql.trim().toLowerCase().matches(pattern);
+  }
 }

kafka-ui-api/src/main/java/com/provectus/kafka/ui/strategy/ksql/statement/TerminateStrategy.java

@@ -5,9 +5,8 @@ import com.provectus.kafka.ui.model.KsqlCommandResponse;
 import org.springframework.stereotype.Component;
 
 @Component
-public class TerminateStrategy extends KsqlStatementStrategy {
+public class TerminateStrategy extends BaseStrategy {
-  private final String requestPath = "/ksql";
+  private static final String responseValueKey = "commandStatus";
-  private final String responseValueKey = "commandStatus";
 
   @Override
   public KsqlCommandResponse serializeResponse(JsonNode response) {
@@ -16,7 +15,7 @@ public class TerminateStrategy extends KsqlStatementStrategy {
 
   @Override
   protected String getRequestPath() {
-    return requestPath;
+    return BaseStrategy.ksqlRequestPath;
   }
 
   @Override

kafka-ui-api/src/main/resources/application-local.yml

@@ -5,6 +5,7 @@ kafka:
       bootstrapServers: localhost:9092
       zookeeper: localhost:2181
       schemaRegistry: http://localhost:8081
+      ksqldbServer: http://localhost:8088
       kafkaConnect:
         - name: first
           address: http://localhost:8083

kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/KsqlServiceTest.java

@@ -13,7 +13,7 @@ import com.provectus.kafka.ui.exception.UnprocessableEntityException;
 import com.provectus.kafka.ui.model.KafkaCluster;
 import com.provectus.kafka.ui.model.KsqlCommand;
 import com.provectus.kafka.ui.model.KsqlCommandResponse;
-import com.provectus.kafka.ui.strategy.ksql.statement.KsqlStatementStrategy;
+import com.provectus.kafka.ui.strategy.ksql.statement.BaseStrategy;
 import com.provectus.kafka.ui.strategy.ksql.statement.ShowStrategy;
 import java.util.List;
 import java.util.Optional;
@@ -29,7 +29,7 @@ import reactor.test.StepVerifier;
 @ExtendWith(MockitoExtension.class)
 class KsqlServiceTest {
   private KsqlService ksqlService;
-  private KsqlStatementStrategy ksqlStatementStrategy;
+  private BaseStrategy baseStrategy;
 
   @Mock
   private ClustersStorage clustersStorage;
@@ -39,16 +39,16 @@ class KsqlServiceTest {
 
   @BeforeEach
   public void setUp() {
-    this.ksqlStatementStrategy = new ShowStrategy();
+    this.baseStrategy = new ShowStrategy();
     this.ksqlService = new KsqlService(
         this.ksqlClient,
         this.clustersStorage,
-        List.of(ksqlStatementStrategy)
+        List.of(baseStrategy)
     );
   }
 
   @Test
-  public void shouldThrowClusterNotFoundExceptionOnExecuteKsqlCommand() {
+  void shouldThrowClusterNotFoundExceptionOnExecuteKsqlCommand() {
     String clusterName = "test";
     KsqlCommand command = (new KsqlCommand()).ksql("show streams;");
     when(clustersStorage.getClusterByName(clusterName)).thenReturn(Optional.ofNullable(null));
@@ -58,7 +58,7 @@ class KsqlServiceTest {
   }
 
   @Test
-  public void shouldThrowKsqlDbNotFoundExceptionOnExecuteKsqlCommand() {
+  void shouldThrowKsqlDbNotFoundExceptionOnExecuteKsqlCommand() {
     String clusterName = "test";
     KsqlCommand command = (new KsqlCommand()).ksql("show streams;");
     KafkaCluster kafkaCluster = Mockito.mock(KafkaCluster.class);
@@ -71,7 +71,7 @@ class KsqlServiceTest {
   }
 
   @Test
-  public void shouldThrowUnprocessableEntityExceptionOnExecuteKsqlCommand() {
+  void shouldThrowUnprocessableEntityExceptionOnExecuteKsqlCommand() {
     String clusterName = "test";
     KsqlCommand command =
         (new KsqlCommand()).ksql("CREATE STREAM users WITH (KAFKA_TOPIC='users');");
@@ -88,7 +88,7 @@ class KsqlServiceTest {
   }
 
   @Test
-  public void shouldSetHostToStrategy() {
+  void shouldSetHostToStrategy() {
     String clusterName = "test";
     String host = "localhost:8088";
     KsqlCommand command = (new KsqlCommand()).ksql("show streams;");
@@ -100,11 +100,11 @@ class KsqlServiceTest {
     when(ksqlClient.execute(any())).thenReturn(Mono.just(new KsqlCommandResponse()));
 
     ksqlService.executeKsqlCommand(clusterName, Mono.just(command)).block();
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo(host + "/ksql");
+    assertThat(baseStrategy.getUri()).isEqualTo(host + "/ksql");
   }
 
   @Test
-  public void shouldCallClientAndReturnResponse() {
+  void shouldCallClientAndReturnResponse() {
     String clusterName = "test";
     KsqlCommand command = (new KsqlCommand()).ksql("show streams;");
     KafkaCluster kafkaCluster = Mockito.mock(KafkaCluster.class);
@@ -117,7 +117,7 @@ class KsqlServiceTest {
 
     KsqlCommandResponse receivedResponse =
         ksqlService.executeKsqlCommand(clusterName, Mono.just(command)).block();
-    verify(ksqlClient, times(1)).execute(ksqlStatementStrategy);
+    verify(ksqlClient, times(1)).execute(baseStrategy);
     assertThat(receivedResponse).isEqualTo(response);
 
   }

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/CreateStrategyTest.java

@@ -18,29 +18,29 @@ import org.mockito.junit.jupiter.MockitoExtension;
 @ExtendWith(MockitoExtension.class)
 class CreateStrategyTest {
   private final ObjectMapper mapper = new ObjectMapper();
-  private KsqlStatementStrategy ksqlStatementStrategy;
+  private CreateStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new CreateStrategy();
+    strategy = new CreateStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("CREATE STREAM stream WITH (KAFKA_TOPIC='topic');"));
+    assertTrue(strategy.test("CREATE STREAM stream WITH (KAFKA_TOPIC='topic');"));
-    assertTrue(ksqlStatementStrategy.test("CREATE STREAM stream"
+    assertTrue(strategy.test("CREATE STREAM stream"
         + " AS SELECT users.id AS userid FROM users EMIT CHANGES;"
     ));
-    assertTrue(ksqlStatementStrategy.test(
+    assertTrue(strategy.test(
         "CREATE TABLE table (id VARCHAR) WITH (KAFKA_TOPIC='table');"
     ));
-    assertTrue(ksqlStatementStrategy.test(
+    assertTrue(strategy.test(
         "CREATE TABLE pageviews_regions WITH (KEY_FORMAT='JSON')"
             + "  AS SELECT gender, COUNT(*) AS numbers"
             + "  FROM pageviews EMIT CHANGES;"
@@ -48,29 +48,29 @@ class CreateStrategyTest {
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("show streams;"));
+    assertFalse(strategy.test("show streams;"));
-    assertFalse(ksqlStatementStrategy.test("show tables;"));
+    assertFalse(strategy.test("show tables;"));
-    assertFalse(ksqlStatementStrategy.test("CREATE TABLE test;"));
+    assertFalse(strategy.test("CREATE TABLE test;"));
-    assertFalse(ksqlStatementStrategy.test("CREATE STREAM test;"));
+    assertFalse(strategy.test("CREATE STREAM test;"));
   }
 
   @Test
-  public void shouldSerializeResponse() {
+  void shouldSerializeResponse() {
     String message = "updated successful";
     JsonNode node = getResponseWithMessage(message);
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     assertThat(serializedResponse.getMessage()).isEqualTo(message);
 
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode commandStatusNode = mapper.createObjectNode().put("commandStatus", "nodeWithMessage");
     JsonNode node = mapper.createArrayNode().add(mapper.valueToTree(commandStatusNode));
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/DescribeStrategyTest.java

@@ -20,48 +20,48 @@ import org.mockito.junit.jupiter.MockitoExtension;
 @ExtendWith(MockitoExtension.class)
 class DescribeStrategyTest {
   private final ObjectMapper mapper = new ObjectMapper();
-  private KsqlStatementStrategy ksqlStatementStrategy;
+  private DescribeStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new DescribeStrategy();
+    strategy = new DescribeStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("DESCRIBE users;"));
+    assertTrue(strategy.test("DESCRIBE users;"));
-    assertTrue(ksqlStatementStrategy.test("DESCRIBE EXTENDED users;"));
+    assertTrue(strategy.test("DESCRIBE EXTENDED users;"));
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("list streams;"));
+    assertFalse(strategy.test("list streams;"));
-    assertFalse(ksqlStatementStrategy.test("show tables;"));
+    assertFalse(strategy.test("show tables;"));
   }
 
   @Test
-  public void shouldSerializeResponse() {
+  void shouldSerializeResponse() {
     JsonNode node = getResponseWithObjectNode();
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("key", "value"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("name", "kafka")));
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode sourceDescriptionNode =
         mapper.createObjectNode().put("sourceDescription", "nodeWithMessage");
     JsonNode node = mapper.createArrayNode().add(mapper.valueToTree(sourceDescriptionNode));
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/DropStrategyTest.java

@@ -18,49 +18,49 @@ import org.mockito.junit.jupiter.MockitoExtension;
 @ExtendWith(MockitoExtension.class)
 class DropStrategyTest {
   private final ObjectMapper mapper = new ObjectMapper();
-  private KsqlStatementStrategy ksqlStatementStrategy;
+  private DropStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new DropStrategy();
+    strategy = new DropStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("drop table table1;"));
+    assertTrue(strategy.test("drop table table1;"));
-    assertTrue(ksqlStatementStrategy.test("drop stream stream2;"));
+    assertTrue(strategy.test("drop stream stream2;"));
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("show streams;"));
+    assertFalse(strategy.test("show streams;"));
-    assertFalse(ksqlStatementStrategy.test("show tables;"));
+    assertFalse(strategy.test("show tables;"));
-    assertFalse(ksqlStatementStrategy.test("create table test;"));
+    assertFalse(strategy.test("create table test;"));
-    assertFalse(ksqlStatementStrategy.test("create stream test;"));
+    assertFalse(strategy.test("create stream test;"));
   }
 
   @Test
-  public void shouldSerializeResponse() {
+  void shouldSerializeResponse() {
     String message = "updated successful";
     JsonNode node = getResponseWithMessage(message);
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     assertThat(serializedResponse.getMessage()).isEqualTo(message);
 
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode commandStatusNode = mapper.createObjectNode().put("commandStatus", "nodeWithMessage");
     JsonNode node = mapper.createArrayNode().add(mapper.valueToTree(commandStatusNode));
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/ExplainStrategyTest.java

@@ -20,46 +20,46 @@ import org.mockito.junit.jupiter.MockitoExtension;
 @ExtendWith(MockitoExtension.class)
 class ExplainStrategyTest {
   private final ObjectMapper mapper = new ObjectMapper();
-  private KsqlStatementStrategy ksqlStatementStrategy;
+  private ExplainStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new ExplainStrategy();
+    strategy = new ExplainStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("explain users_query_id;"));
+    assertTrue(strategy.test("explain users_query_id;"));
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("show queries;"));
+    assertFalse(strategy.test("show queries;"));
   }
 
   @Test
-  public void shouldSerializeResponse() {
+  void shouldSerializeResponse() {
     JsonNode node = getResponseWithObjectNode();
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("key", "value"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("name", "kafka")));
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode sourceDescriptionNode =
         mapper.createObjectNode().put("sourceDescription", "nodeWithMessage");
     JsonNode node = mapper.createArrayNode().add(mapper.valueToTree(sourceDescriptionNode));
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/ListStrategyTest.java

@@ -1,111 +0,0 @@
-package com.provectus.kafka.ui.strategy.ksql.statement;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.provectus.kafka.ui.exception.UnprocessableEntityException;
-import com.provectus.kafka.ui.model.KsqlCommandResponse;
-import com.provectus.kafka.ui.model.Table;
-import java.util.List;
-import lombok.SneakyThrows;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
-import org.mockito.junit.jupiter.MockitoExtension;
-
-@ExtendWith(MockitoExtension.class)
-class ListStrategyTest {
-  private final ObjectMapper mapper = new ObjectMapper();
-  private KsqlStatementStrategy ksqlStatementStrategy;
-
-  @BeforeEach
-  public void setUp() {
-    ksqlStatementStrategy = new ListStrategy();
-  }
-
-  @Test
-  public void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
-  }
-
-  @Test
-  public void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("LIST STREAMS;"));
-    assertTrue(ksqlStatementStrategy.test("LIST TABLES;"));
-    assertTrue(ksqlStatementStrategy.test("LIST TOPICS;"));
-    assertTrue(ksqlStatementStrategy.test("LIST FUNCTIONS;"));
-  }
-
-  @Test
-  public void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("SHOW STREAMS;"));
-    assertFalse(ksqlStatementStrategy.test("SHOW TABLES;"));
-    assertFalse(ksqlStatementStrategy.test("SHOW TOPICS;"));
-    assertFalse(ksqlStatementStrategy.test("SHOW FUNCTIONS;"));
-  }
-
-  @Test
-  public void shouldSerializeStreamsResponse() {
-    JsonNode node = getResponseWithData("streams");
-    ksqlStatementStrategy.test("list streams;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
-    Table table = serializedResponse.getData();
-    assertThat(table.getHeaders()).isEqualTo(List.of("header"));
-    assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
-  }
-
-  @Test
-  public void shouldSerializeTablesResponse() {
-    JsonNode node = getResponseWithData("tables");
-    ksqlStatementStrategy.test("list tables;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
-    Table table = serializedResponse.getData();
-    assertThat(table.getHeaders()).isEqualTo(List.of("header"));
-    assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
-  }
-
-  @Test
-  public void shouldSerializeTopicsResponse() {
-    JsonNode node = getResponseWithData("topics");
-    ksqlStatementStrategy.test("list topics;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
-    Table table = serializedResponse.getData();
-    assertThat(table.getHeaders()).isEqualTo(List.of("header"));
-    assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
-  }
-
-  @Test
-  public void shouldSerializeFunctionsResponse() {
-    JsonNode node = getResponseWithData("functions");
-    ksqlStatementStrategy.test("list functions;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
-    Table table = serializedResponse.getData();
-    assertThat(table.getHeaders()).isEqualTo(List.of("header"));
-    assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
-  }
-
-  @Test
-  public void shouldSerializeWithException() {
-    JsonNode node = getResponseWithData("streams");
-    ksqlStatementStrategy.test("list tables;");
-    Exception exception = assertThrows(
-        UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
-    );
-
-    assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");
-  }
-
-  @SneakyThrows
-  private JsonNode getResponseWithData(String key) {
-    JsonNode nodeWithDataItem = mapper.createObjectNode().put("header", "value");
-    JsonNode nodeWithData = mapper.createArrayNode().add(nodeWithDataItem);
-    JsonNode nodeWithResponse = mapper.createObjectNode().set(key, nodeWithData);
-    return mapper.createArrayNode().add(mapper.valueToTree(nodeWithResponse));
-  }
-}

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/SelectStrategyTest.java

@@ -19,46 +19,46 @@ import org.mockito.junit.jupiter.MockitoExtension;
 
 @ExtendWith(MockitoExtension.class)
 class SelectStrategyTest {
-  private KsqlStatementStrategy ksqlStatementStrategy;
   private final ObjectMapper mapper = new ObjectMapper();
+  private SelectStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new SelectStrategy();
+    strategy = new SelectStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/query");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/query");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("select * from users;"));
+    assertTrue(strategy.test("select * from users;"));
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("show streams;"));
+    assertFalse(strategy.test("show streams;"));
-    assertFalse(ksqlStatementStrategy.test("select *;"));
+    assertFalse(strategy.test("select *;"));
   }
 
   @Test
-  public void shouldSerializeResponse() {
+  void shouldSerializeResponse() {
     JsonNode node = getResponseWithData();
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header1", "header2"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value1", "value2")));
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode node = mapper.createObjectNode();
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/ShowStrategyTest.java

@@ -19,107 +19,107 @@ import org.mockito.junit.jupiter.MockitoExtension;
 
 @ExtendWith(MockitoExtension.class)
 class ShowStrategyTest {
-  private KsqlStatementStrategy ksqlStatementStrategy;
   private final ObjectMapper mapper = new ObjectMapper();
+  private ShowStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new ShowStrategy();
+    strategy = new ShowStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("SHOW STREAMS;"));
+    assertTrue(strategy.test("SHOW STREAMS;"));
-    assertTrue(ksqlStatementStrategy.test("SHOW TABLES;"));
+    assertTrue(strategy.test("SHOW TABLES;"));
-    assertTrue(ksqlStatementStrategy.test("SHOW TOPICS;"));
+    assertTrue(strategy.test("SHOW TOPICS;"));
-    assertTrue(ksqlStatementStrategy.test("SHOW QUERIES;"));
+    assertTrue(strategy.test("SHOW QUERIES;"));
-    assertTrue(ksqlStatementStrategy.test("SHOW PROPERTIES;"));
+    assertTrue(strategy.test("SHOW PROPERTIES;"));
-    assertTrue(ksqlStatementStrategy.test("SHOW FUNCTIONS;"));
+    assertTrue(strategy.test("SHOW FUNCTIONS;"));
+    assertTrue(strategy.test("LIST STREAMS;"));
+    assertTrue(strategy.test("LIST TABLES;"));
+    assertTrue(strategy.test("LIST TOPICS;"));
+    assertTrue(strategy.test("LIST FUNCTIONS;"));
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("LIST STREAMS;"));
+    assertFalse(strategy.test("LIST QUERIES;"));
-    assertFalse(ksqlStatementStrategy.test("LIST TABLES;"));
+    assertFalse(strategy.test("LIST PROPERTIES;"));
-    assertFalse(ksqlStatementStrategy.test("LIST TOPICS;"));
-    assertFalse(ksqlStatementStrategy.test("LIST QUERIES;"));
-    assertFalse(ksqlStatementStrategy.test("LIST PROPERTIES;"));
-    assertFalse(ksqlStatementStrategy.test("LIST FUNCTIONS;"));
   }
 
   @Test
-  public void shouldSerializeStreamsResponse() {
+  void shouldSerializeStreamsResponse() {
     JsonNode node = getResponseWithData("streams");
-    ksqlStatementStrategy.test("show streams;");
+    strategy.test("show streams;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
   }
 
   @Test
-  public void shouldSerializeTablesResponse() {
+  void shouldSerializeTablesResponse() {
     JsonNode node = getResponseWithData("tables");
-    ksqlStatementStrategy.test("show tables;");
+    strategy.test("show tables;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
   }
 
   @Test
-  public void shouldSerializeTopicsResponse() {
+  void shouldSerializeTopicsResponse() {
     JsonNode node = getResponseWithData("topics");
-    ksqlStatementStrategy.test("show topics;");
+    strategy.test("show topics;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
   }
 
   @Test
-  public void shouldSerializePropertiesResponse() {
+  void shouldSerializePropertiesResponse() {
     JsonNode node = getResponseWithData("properties");
-    ksqlStatementStrategy.test("show properties;");
+    strategy.test("show properties;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
   }
 
   @Test
-  public void shouldSerializeFunctionsResponse() {
+  void shouldSerializeFunctionsResponse() {
     JsonNode node = getResponseWithData("functions");
-    ksqlStatementStrategy.test("show functions;");
+    strategy.test("show functions;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
   }
 
   @Test
-  public void shouldSerializeQueriesResponse() {
+  void shouldSerializeQueriesResponse() {
     JsonNode node = getResponseWithData("queries");
-    ksqlStatementStrategy.test("show queries;");
+    strategy.test("show queries;");
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     Table table = serializedResponse.getData();
     assertThat(table.getHeaders()).isEqualTo(List.of("header"));
     assertThat(table.getRows()).isEqualTo(List.of(List.of("value")));
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode node = getResponseWithData("streams");
-    ksqlStatementStrategy.test("show tables;");
+    strategy.test("show tables;");
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");

kafka-ui-api/src/test/java/com/provectus/kafka/ui/strategy/ksql/statement/TerminateStrategyTest.java

@@ -18,46 +18,46 @@ import org.mockito.junit.jupiter.MockitoExtension;
 @ExtendWith(MockitoExtension.class)
 class TerminateStrategyTest {
   private final ObjectMapper mapper = new ObjectMapper();
-  private KsqlStatementStrategy ksqlStatementStrategy;
+  private TerminateStrategy strategy;
 
   @BeforeEach
-  public void setUp() {
+  void setUp() {
-    ksqlStatementStrategy = new TerminateStrategy();
+    strategy = new TerminateStrategy();
   }
 
   @Test
-  public void shouldReturnUri() {
+  void shouldReturnUri() {
-    ksqlStatementStrategy.host("ksqldb-server:8088");
+    strategy.host("ksqldb-server:8088");
-    assertThat(ksqlStatementStrategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
+    assertThat(strategy.getUri()).isEqualTo("ksqldb-server:8088/ksql");
   }
 
   @Test
-  public void shouldReturnTrueInTest() {
+  void shouldReturnTrueInTest() {
-    assertTrue(ksqlStatementStrategy.test("terminate query_id;"));
+    assertTrue(strategy.test("terminate query_id;"));
   }
 
   @Test
-  public void shouldReturnFalseInTest() {
+  void shouldReturnFalseInTest() {
-    assertFalse(ksqlStatementStrategy.test("show streams;"));
+    assertFalse(strategy.test("show streams;"));
-    assertFalse(ksqlStatementStrategy.test("create table test;"));
+    assertFalse(strategy.test("create table test;"));
   }
 
   @Test
-  public void shouldSerializeResponse() {
+  void shouldSerializeResponse() {
     String message = "query terminated.";
     JsonNode node = getResponseWithMessage(message);
-    KsqlCommandResponse serializedResponse = ksqlStatementStrategy.serializeResponse(node);
+    KsqlCommandResponse serializedResponse = strategy.serializeResponse(node);
     assertThat(serializedResponse.getMessage()).isEqualTo(message);
 
   }
 
   @Test
-  public void shouldSerializeWithException() {
+  void shouldSerializeWithException() {
     JsonNode commandStatusNode = mapper.createObjectNode().put("commandStatus", "nodeWithMessage");
     JsonNode node = mapper.createArrayNode().add(mapper.valueToTree(commandStatusNode));
     Exception exception = assertThrows(
         UnprocessableEntityException.class,
-        () -> ksqlStatementStrategy.serializeResponse(node)
+        () -> strategy.serializeResponse(node)
     );
 
     assertThat(exception.getMessage()).isEqualTo("KSQL DB response mapping error");