fixed PY-9302 Class has no __init__ method: false positive for child class without one

python/src/com/jetbrains/python/inspections/PyClassHasNoInitInspection.java

@@ -40,14 +40,14 @@ public class PyClassHasNoInitInspection extends PyInspection {
 
     @Override
     public void visitPyClass(PyClass node) {
-      final PyFunction init = node.findMethodByName(PyNames.INIT, false);
-      if (init == null) {
+      final PyFunction init = node.findInitOrNew(true);
+      if (init == null || PyNames.NEW.equals(init.getName())) {
         registerProblem(node.getNameIdentifier(), PyBundle.message("INSP.class.has.no.init"),
                         new AddMethodQuickFix("__init__", new PyClassTypeImpl(node, false), false));
       }
       for (PyClass ancestor : node.iterateAncestorClasses()) {
-        final PyFunction ancestorInit = ancestor.findMethodByName(PyNames.INIT, false);
-        if (ancestorInit == null) {
+        final PyFunction ancestorInit = ancestor.findInitOrNew(false);
+        if (ancestorInit == null || PyNames.NEW.equals(ancestorInit.getName())) {
           registerProblem(node.getNameIdentifier(), PyBundle.message("INSP.parent.$0.has.no.init", ancestor.getName()),
                           new AddMethodQuickFix("__init__", new PyClassTypeImpl(ancestor, false), false));
         }

python/testData/inspections/PyClassHasNoInitInspection/initInParentClass.py

@@ -0,0 +1,9 @@
+__author__ = 'ktisha'
+class Base(object):
+    def __init__(self):
+        self.my = 1
+
+
+class Child(Base):   # <- Child class here should not be highlighted since
+# it has init mehtod of Base class.
+    pass

python/testSrc/com/jetbrains/python/inspections/PyClassHasNoInitInspectionTest.java

@@ -19,6 +19,10 @@ public class PyClassHasNoInitInspectionTest extends PyTestCase {
     doTest();
   }
 
+  public void testInitInParentClass() {
+    doTest();
+  }
+
   private void doTest() {
     myFixture.configureByFile("inspections/PyClassHasNoInitInspection/" + getTestName(true) + ".py");
     myFixture.enableInspections(PyClassHasNoInitInspection.class);