Java: When generating return statement where the returned type is an array suggest Collection.toArray() if there's no better option (IDEA-163341)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addReturn/afterArray1.java

@@ -0,0 +1,9 @@
+// "Add 'return' statement" "true"
+import java.util.*;
+class T {
+    String[] f() {
+        List<String> list = new ArrayList<>();
+        list.add("a");
+        return <caret><selection>list.toArray(new String[0])</selection>;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addReturn/afterArray2.java

@@ -0,0 +1,9 @@
+// "Add 'return' statement" "true"
+import java.util.*;
+class T {
+    Object[] f() {
+        Set set = new HashSet();
+        set.add("a");
+        return <caret><selection>set.toArray()</selection>;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addReturn/afterArray3.java

@@ -0,0 +1,11 @@
+// "Add 'return' statement" "true"
+import java.util.*;
+class T {
+    A[] f() {
+        Queue<B> queue = new ArrayDeque<>();
+        queue.add(new B());
+        return <caret><selection>queue.toArray(new A[0])</selection>;
+    }
+}
+class A {}
+class B extends A {}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addReturn/beforeArray1.java

@@ -0,0 +1,8 @@
+// "Add 'return' statement" "true"
+import java.util.*;
+class T {
+    String[] f() {
+        List<String> list = new ArrayList<>();
+        list.add("a");
+        <caret>}
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addReturn/beforeArray2.java

@@ -0,0 +1,8 @@
+// "Add 'return' statement" "true"
+import java.util.*;
+class T {
+    Object[] f() {
+        Set set = new HashSet();
+        set.add("a");
+        <caret>}
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addReturn/beforeArray3.java

@@ -0,0 +1,10 @@
+// "Add 'return' statement" "true"
+import java.util.*;
+class T {
+    A[] f() {
+        Queue<B> queue = new ArrayDeque<>();
+        queue.add(new B());
+        <caret>}
+}
+class A {}
+class B extends A {}