[java] Add test for #2207: AvoidInstantiatingObjectsInLoops false positives

pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/performance/xml/AvoidInstantiatingObjectsInLoops.xml

@@ -89,8 +89,7 @@ public class Foo {
         ]]></code>
     </test-code>
 
-    <!-- FIXME -->
-    <!--test-code>
+    <test-code>
         <description>#278 Semi-false positive for instantiating new object in loop</description>
         <expected-problems>0</expected-problems>
         <code><![CDATA[
@@ -106,7 +105,7 @@ public class Foo {
     }
 }
         ]]></code>
-    </test-code-->
+    </test-code>
 
     <test-code>
         <description>#1215 AvoidInstantiatingObjectsInLoops matches the right side of a list iteration loop</description>
@@ -124,6 +123,46 @@ public class TestInstantiationInLoop {
             System.out.println(filename);
         }
     }
+}
+        ]]></code>
+    </test-code>
+
+    <test-code>
+        <description>[java] False positive: AvoidInstantiatingObjectsInLoops should not flag objects with different parameters or objects assigned or passed as parameters #2207</description>
+        <expected-problems>0</expected-problems>
+        <code><![CDATA[
+import java.awt.Dimension;
+
+public class PMDDemo {
+    public static void main(final String[] args) {
+        final Dimension[] arr = new Dimension[10];
+        for (int i = 0; i < arr.length; i++) {
+            arr[i] = new Dimension(i, i); // rule violation here
+        }
+    }
+}
+        ]]></code>
+    </test-code>
+
+    <test-code>
+        <description>False positive when assigning to a list/array (see #2207 and #1043)</description>
+        <expected-problems>0</expected-problems>
+        <code><![CDATA[
+import java.util.*;
+
+public class PMDDemo {
+    public void checkArray() {
+        Car[] cars = new Car[3];
+        for(int i = 0; i < cars.length; ++i) {
+           cars[i] = new Car();
+        }
+    }
+    public void checkCollection() {
+        Collection<Car> cars = new ArrayList<>();
+        for(int i = 0; i < 3; ++i) {
+           cars.add(new Car());
+        }
+    }
 }
         ]]></code>
     </test-code>