StreamToLoop tests grouped

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

@@ -0,0 +1,24 @@
+// "Fix all 'Stream API call chain can be replaced with loop' problems in file" "true"
+
+import java.util.List;
+import java.util.function.Predicate;
+
+public class Main {
+  static Predicate<String> nonEmpty = s -> s != null && !s.isEmpty();
+
+  private static long testFunctionInField(List<String> strings) {
+    return strings.stream().filter(nonEmpty).cou<caret>nt();
+  }
+
+  private static long testStreamOfFunctions(List<Predicate<String>> predicates, List<String> strings) {
+    return predicates.stream().filter(pred -> pred != null)
+             .flatMap(p -> strings.stream().filter(p)).count();
+  }
+
+  public static void main(String[] args) {
+    System.out.println(testStreamOfFunctions(
+      Arrays.asList(String::isEmpty, s -> s.length() > 3),
+      Arrays.asList("", "a", "abcd", "xyz")
+    ));
+  }
+}