IDEA-160802 fixed case with collection summing

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/afterSumCollection.java

@@ -0,0 +1,14 @@
+// "Replace with sum()" "true"
+
+import java.util.List;
+
+public class Main {
+  interface Person {
+    int getAge();
+  }
+
+  public long test(List<Person> collection) {
+      long i = collection.stream().mapToLong(Person::getAge).sum();
+      return i;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamApiMigration/beforeSumCollection.java

@@ -0,0 +1,17 @@
+// "Replace with sum()" "true"
+
+import java.util.List;
+
+public class Main {
+  interface Person {
+    int getAge();
+  }
+
+  public long test(List<Person> collection) {
+    long i = 0;
+    for(Person person : collecti<caret>on) {
+      i = i + person.getAge();
+    }
+    return i;
+  }
+}