From 75bbe05d18cf446ffde1f13329d7a2fe8b36b9e1 Mon Sep 17 00:00:00 2001
From: Bas Leijdekkers <basleijdekkers@gmail.com>
Date: Wed, 6 Jul 2016 13:01:21 +0200
Subject: [PATCH] IG: warn on covariant equals() in interface but not
 implementations

---
 .../src/com/siyeh/ig/bugs/CovariantEqualsInspection.java        | 2 +-
 .../com/siyeh/igtest/bugs/covariant_equals/CovariantEquals.java | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/bugs/CovariantEqualsInspection.java b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/bugs/CovariantEqualsInspection.java
index 9310fee55930..5e89b0b9c519 100644
--- a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/bugs/CovariantEqualsInspection.java
+++ b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/bugs/CovariantEqualsInspection.java
@@ -68,7 +68,7 @@ public class CovariantEqualsInspection extends BaseInspection {
         return;
       }
       final PsiClass aClass = method.getContainingClass();
-      if (aClass == null || aClass.isInterface()) {
+      if (aClass == null) {
         return;
       }
       final PsiMethod[] methods = aClass.getMethods();
diff --git a/plugins/InspectionGadgets/test/com/siyeh/igtest/bugs/covariant_equals/CovariantEquals.java b/plugins/InspectionGadgets/test/com/siyeh/igtest/bugs/covariant_equals/CovariantEquals.java
index 53d950c98cbd..e34f07954ea3 100644
--- a/plugins/InspectionGadgets/test/com/siyeh/igtest/bugs/covariant_equals/CovariantEquals.java
+++ b/plugins/InspectionGadgets/test/com/siyeh/igtest/bugs/covariant_equals/CovariantEquals.java
@@ -1,5 +1,5 @@
 interface I {
-  boolean equals(I i);
+  boolean <warning descr="'equals()' should take 'Object' as its argument">equals</warning>(I i);
 }
 class A {