assertEquals between incompatible types: ignore collections (IDEA-197547)

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/testFrameworks/AssertHint.java

@@ -195,7 +195,7 @@ public class AssertHint {
     if (!objectType.equals(parameterType1) || !objectType.equals(parameterType2)) {
       return null;
     }
-    if (TypeUtils.areConvertible(type1, type2)) {
+    if (TypeUtils.areConvertible(type1, type2) || TypeUtils.mayBeEqualByContract(type1, type2)) {
       return null;
     }
     final String comparedTypeText = type1.getPresentableText();

plugins/InspectionGadgets/test/com/siyeh/igtest/junit/assert_equals_between_inconvertible_types/AssertEqualsBetweenInconvertibleTypes.java

@@ -25,6 +25,7 @@ public class AssertEqualsBetweenInconvertibleTypes {
         Collection<B> c2 = null;
         assertEquals(c1, c2);
         assertEquals(new ArrayList<String>(){}, new ArrayList<String>());
+        assertEquals(new TreeSet<String>(){}, new HashSet<String>());
     }
 
     interface A {}