IDEA-161198 Migration from Stream API back to for loops

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterAverageInt.java

@@ -0,0 +1,22 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.OptionalDouble;
+import java.util.stream.IntStream;
+
+public class Main {
+  private static OptionalDouble test(int... numbers) {
+      long sum = 0;
+      long count = 0;
+      for (int x : numbers) {
+          if (x > 0) {
+              sum += x;
+              count++;
+          }
+      }
+      return (count == 0 ? OptionalDouble.empty() : OptionalDouble.of((double) sum / count));
+  }
+
+  public static void main(String[] args) {
+    System.out.println(test(-1,-2,-3));
+  }
+}