### Question:
UClassIdent extends UIdent { @VisibleForTesting public static UClassIdent create(String qualifiedName) { List<String> topLevelPath = new ArrayList<>(); for (String component : Splitter.on('.').split(qualifiedName)) { topLevelPath.add(component); if (Character.isUpperCase(component.charAt(0))) { break; } } return create(Joiner.on('.').join(topLevelPath), qualifiedName); }  @VisibleForTesting static UClassIdent create(String qualifiedName); static UClassIdent create(ClassSymbol sym); abstract String getTopLevelClass(); @Override abstract StringName getName(); ClassSymbol resolve(Inliner inliner); @Override JCExpression inline(Inliner inliner); @Nullable Choice<Unifier> unify(@Nullable Symbol symbol, Unifier unifier);  }### Answer:
@Test public void equality() throws CouldNotResolveImportException { new EqualsTester() .addEqualityGroup(UClassIdent.create("java.util.List")) .addEqualityGroup(UClassIdent.create("com.sun.tools.javac.util.List")) .addEqualityGroup( UClassIdent.create("java.lang.String"), UClassIdent.create(inliner.resolveClass("java.lang.String"))) .testEquals(); }
@Test public void serialization() { SerializableTester.reserializeAndAssert(UClassIdent.create("java.math.BigInteger")); }
@Test public void importConflicts() { ImportPolicy.bind(context, ImportPolicy.IMPORT_TOP_LEVEL); context.put(PackageSymbol.class, Symtab.instance(context).rootPackage); inliner.addImport("package.Exception"); assertInlines("Exception", UClassIdent.create("package.Exception")); assertInlines("anotherPackage.Exception", UClassIdent.create("anotherPackage.Exception")); new EqualsTester() .addEqualityGroup(inliner.getImportsToAdd(), ImmutableSet.of("package.Exception")) .testEquals(); inliner.addImport("package.subpackage.Foo.Bar"); assertInlines("Foo.Bar", UClassIdent.create("package.Foo.Bar")); assertInlines("Bar", UClassIdent.create("package.subpackage.Foo.Bar")); assertInlines("anotherPackage.Foo.Bar", UClassIdent.create("anotherPackage.Foo.Bar")); new EqualsTester() .addEqualityGroup( inliner.getImportsToAdd(), ImmutableSet.of("package.Exception", "package.subpackage.Foo.Bar", "package.Foo")) .testEquals(); }