remove incorrect qualified name check; provide tests (IDEA-71870) [r=jeka]

java/java-tests/testData/psi/classUtil/ManyClasses.java

@@ -0,0 +1,47 @@
+import java.lang.Comparable;
+import java.lang.Integer;
+import java.lang.Override;
+import java.lang.Runnable;
+
+public class ManyClasses {
+  public void foo() {
+    Runnable r = new Runnable() {
+      @Override
+      public void run() {
+        Comparable<Integer> c = new Comparable<Integer>() {
+          @Override
+          public int compareTo(Integer o) {
+            return 0;
+          }
+        };
+      }
+    };
+    
+    class FooLocal {
+      Runnable r = new Runnable() {
+        @Override
+        public void run() {
+        }
+      };
+    }
+  }
+  
+  public void bar() {
+    class FooLocal implements Runnable {
+      @Override
+      public void run() {
+      }
+    }
+  }
+  
+  public class Child {
+    
+  }
+  
+}
+
+class Local {
+  public static class Sub {
+
+  }
+}