Added CompletableFuture.supplyAsync mock implementation

Author: Damtev

utbot-framework/src/main/java/org/utbot/engine/overrides/threads/CompletableFuture.java

@@ -3,6 +3,7 @@
 import org.utbot.api.annotation.UtClassMock;
 
 import java.util.concurrent.Executor;
+import java.util.function.Supplier;
 
 @UtClassMock(target = java.util.concurrent.CompletableFuture.class, internalUsage = true)
 public class CompletableFuture {
@@ -16,4 +17,14 @@ public static java.util.concurrent.CompletableFuture<Void> runAsync(Runnable run
     public static java.util.concurrent.CompletableFuture<Void> runAsync(Runnable runnable, Executor ignoredExecutor) {
         return runAsync(runnable);
     }
+
+    public static <U> java.util.concurrent.CompletableFuture<U> supplyAsync(Supplier<U> supplier) {
+        try {
+            final U value = supplier.get();
+
+            return new UtCompletableFuture<>(value).toCompletableFuture();
+        } catch (Throwable e) {
+            return new UtCompletableFuture<U>(e).toCompletableFuture();
+        }
+    }
 }

utbot-sample/src/main/java/org/utbot/examples/threads/FutureExamples.java

@@ -14,7 +14,7 @@ public void throwingRunnableExample() throws ExecutionException, InterruptedExce
         future.get();
     }
 
-    public int  resultFromGet() throws ExecutionException, InterruptedException {
+    public int resultFromGet() throws ExecutionException, InterruptedException {
         final CompletableFuture<Integer> future = CompletableFuture.supplyAsync(() -> 42);
 
         return future.get();