moreSpecific: use site info to check assignability, prefer concrete to abstract methods (IDEA-57569)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/ambiguousIDEA57569/pck/AmbiguousMethodCall.java

@@ -0,0 +1,11 @@
+package pck;
+abstract class C<T>  {
+    abstract Object foo(T x);
+    String foo(String x) { return null; }
+}
+
+class D extends C<String>{
+    {
+        foo("");
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/AmbiguousTypeParamVsConcrete.java

@@ -0,0 +1,22 @@
+public class CssPropertyValueImpl extends CssTableValueBase<CssPropertyValue, Object> implements CssPropertyValue {
+  public CssPropertyValueImpl(final Type type) {
+    super(type);
+  }
+}
+
+public abstract class CssTableValueBase<V extends CssTableValue, T> implements CssTableValue<V, T> {
+
+  protected CssTableValueBase(final Type type) {
+  }
+
+  protected CssTableValueBase(final T value) {
+  }
+}
+
+enum Type {}
+
+interface CssTableValue<A, B> {
+}
+
+interface CssPropertyValue extends CssTableValue<CssPropertyValue, Object> {
+}