chore: Properly shutdown executor service that checks for updates

Author: en-milie

src/main/java/com/endava/cats/command/CatsCommand.java

@@ -55,6 +55,7 @@
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 
 import static org.fusesource.jansi.Ansi.ansi;
@@ -116,7 +117,7 @@
                 GenerateCommand.class,
                 ExplainCommand.class
         })
-public class CatsCommand implements Runnable, CommandLine.IExitCodeGenerator {
+public class CatsCommand implements Runnable, CommandLine.IExitCodeGenerator, AutoCloseable {
 
     private final PrettyLogger logger;
     private static final String SEPARATOR = "-".repeat(ConsoleUtils.getConsoleColumns(22));
@@ -494,4 +495,17 @@ private List<FuzzingData> filterFuzzingData(List<FuzzingData> fuzzingDataListWit
     public int getExitCode() {
         return exitCodeDueToErrors + executionStatisticsListener.getErrors();
     }
+
+    @Override
+    public void close() throws Exception {
+        executor.shutdown();
+        try {
+            if (!executor.awaitTermination(1, TimeUnit.SECONDS)) {
+                executor.shutdownNow();
+            }
+        } catch (InterruptedException e) {
+            executor.shutdownNow();
+            Thread.currentThread().interrupt();
+        }
+    }
 }

src/test/java/com/endava/cats/command/LintCommandTest.java

@@ -28,16 +28,20 @@ class LintCommandTest {
     TestCaseListener testCaseListener;
     @Inject
     FilterArguments filterArguments;
+    picocli.CommandLine.Model.CommandSpec spec;
 
 
     @BeforeEach
     void init() {
+        picocli.CommandLine commandLine = new picocli.CommandLine(lintCommand);
+        spec = commandLine.getCommandSpec();
         ReflectionTestUtils.setField(lintCommand, "contract", "contract");
         ReflectionTestUtils.setField(filterArguments, "fuzzersToBeRunComputed", false);
+        ReflectionTestUtils.setField(filterArguments, "profile", "full");
         ReflectionTestUtils.setField(lintCommand, "catsCommand", catsCommand);
+        ReflectionTestUtils.setField(catsCommand, "spec", spec);
         ReflectionTestUtils.setField(lintCommand, "skipLinters", Collections.emptyList());
         ReflectionTestUtils.setField(testCaseListener, "testReportsGenerator", Mockito.mock(TestReportsGenerator.class));
-
     }
 
     @Test