Added unit test for Haehnchen#1599

Author: adamwojs

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/util/PhpElementsUtilTest.java

@@ -2,17 +2,15 @@
 
 import com.intellij.psi.PsiElement;
 import com.intellij.util.containers.ContainerUtil;
+import com.jetbrains.php.PhpIndex;
 import com.jetbrains.php.lang.PhpFileType;
 import com.jetbrains.php.lang.psi.PhpPsiElementFactory;
 import com.jetbrains.php.lang.psi.elements.*;
 import fr.adrienbrault.idea.symfony2plugin.tests.SymfonyLightCodeInsightFixtureTestCase;
 import fr.adrienbrault.idea.symfony2plugin.util.MethodMatcher;
 import fr.adrienbrault.idea.symfony2plugin.util.PhpElementsUtil;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
+import java.util.*;
 
 /**
  * @author Daniel Espendiller <daniel@espendiller.net>
@@ -307,4 +305,21 @@ public void testThatPhpThatStringValueCanBeResolvedViaChainResolve() {
         assertContainsElements(PhpElementsUtil.StringResolver.findStringValues(PhpPsiElementFactory.createPhpPsiFromText(getProject(), ParameterList.class, "<?php $var = 'test.html'; foo($var);").getFirstPsiChild()), "test.html");
         assertContainsElements(PhpElementsUtil.StringResolver.findStringValues(PhpPsiElementFactory.createPhpPsiFromText(getProject(), TernaryExpression.class, "<?php $var = 'test.html'; $x = true == true ? $var : 'test2.html';")), "test.html", "test2.html");
     }
+
+    public void testGetImplementedMethodsForRecursiveClassHierarchy() {
+        myFixture.addFileToProject("First.php", "<?php class First extends Second { public function method() {} }");
+        myFixture.addFileToProject("Second.php", "<?php class Second extends First { public function method() {} }");
+
+        var firstClass = PhpIndex.getInstance(getProject()).getClassByName("First");
+        var secondClass = PhpIndex.getInstance(getProject()).getClassByName("Second");
+
+        var actualResult = PhpElementsUtil.getImplementedMethods(
+            secondClass.findOwnMethodByName("method")
+        );
+
+        assertEquals(new Method[] {
+            secondClass.findOwnMethodByName("method"),
+            firstClass.findOwnMethodByName("method")
+        }, actualResult);
+    }
 }