IDEA-163405 Migration from Stream API back to for loops: iteration#2

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

@@ -0,0 +1,21 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class Main {
+  public static Map<Integer, String> test(List<String> strings) {
+      Map<Integer, String> map = new HashMap<>();
+      for (String str : strings) {
+          if (map.put(str.length(), str) != null) {
+              throw new IllegalStateException("Duplicate key");
+          }
+      }
+      return map;
+  }
+
+  public static void main(String[] args) {
+    System.out.println(test(Arrays.asList()));
+    System.out.println(test(Arrays.asList("a", "bbb", "cc", "d", "eee", "")));
+  }
+}