Add support for the "external" keyword to summaries.

pkg/analyzer/test/src/summary/resynthesize_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/builder.dart';
 import 'package:analyzer/src/summary/format.dart';
@@ skipping 515 matching lines @@
   void set b(int i) {}
   void f() {}
   int x;
 }''');
   }
 
   test_class_constructor_const() {
     checkLibrary('class C { const C(); }');
   }
 
+  test_class_constructor_const_external() {
+    checkLibrary('class C { external const C(); }');
+  }
+
   test_class_constructor_explicit_named() {
     checkLibrary('class C { C.foo(); }');
   }
 
   test_class_constructor_explicit_type_params() {
     checkLibrary('class C<T, U> { C(); }');
   }
 
   test_class_constructor_explicit_unnamed() {
     checkLibrary('class C { C(); }');
   }
 
+  test_class_constructor_external() {
+    checkLibrary('class C { external C(); }');
+  }
+
   test_class_constructor_factory() {
     checkLibrary('class C { factory C() => null; }');
   }
 
   test_class_constructor_implicit() {
     checkLibrary('class C {}');
   }
 
   test_class_constructor_implicit_type_params() {
     checkLibrary('class C<T, U> {}');
@@ skipping 12 matching lines @@
   }
 
   test_class_field_static() {
     checkLibrary('class C { static int i; }');
   }
 
   test_class_fields() {
     checkLibrary('class C { int i; int j; }');
   }
 
+  test_class_getter_external() {
+    checkLibrary('class C { external int get x; }');
+  }
+
   test_class_getter_static() {
     checkLibrary('class C { static int get x => null; }');
   }
 
   test_class_getters() {
     checkLibrary('class C { int get x => null; get y => null; }');
   }
 
   test_class_interfaces() {
     checkLibrary('class C implements D, E {} class D {} class E {}');
   }
 
+  test_class_method_external() {
+    checkLibrary('class C { external f(); }');
+  }
+
   test_class_method_params() {
     checkLibrary('class C { f(x, y) {} }');
   }
 
   test_class_method_static() {
     checkLibrary('class C { static f() {} }');
   }
 
   test_class_methods() {
     checkLibrary('class C { f() {} g() {} }');
   }
 
   test_class_mixins() {
     checkLibrary('class C extends Object with D, E {} class D {} class E {}');
   }
 
+  test_class_setter_external() {
+    checkLibrary('class C { external void set x(int value); }');
+  }
+
   test_class_setter_static() {
     checkLibrary('class C { static void set x(int value) {} }');
   }
 
   test_class_setters() {
     checkLibrary('class C { void set x(int value) {} set y(value) {} }');
   }
 
   test_class_supertype() {
     checkLibrary('class C extends D {} class D {}');
@@ skipping 41 matching lines @@
     addLibrary('dart:async');
     checkLibrary('export "dart:async" show Future, Stream;');
   }
 
   test_exports() {
     addLibrarySource('/a.dart', 'library a;');
     addLibrarySource('/b.dart', 'library b;');
     checkLibrary('export "a.dart"; export "b.dart";');
   }
 
+  test_function_external() {
+    checkLibrary('external f();');
+  }
+
   test_function_parameter_kind_named() {
     // TODO(paulberry): also test default value.
     checkLibrary('f({x}) {}');
   }
 
   test_function_parameter_kind_positional() {
     // TODO(paulberry): also test default value.
     checkLibrary('f([x]) {}');
   }
 
@@ skipping 30 matching lines @@
   }
 
   test_function_return_type_void() {
     checkLibrary('void f() {}');
   }
 
   test_functions() {
     checkLibrary('f() {} g() {}');
   }
 
+  test_getter_external() {
+    checkLibrary('external int get x;');
+  }
+
   test_getters() {
     checkLibrary('int get x => null; get y => null;');
   }
 
   test_import_hide() {
     addLibrary('dart:async');
     checkLibrary('import "dart:async" hide Stream, Completer; Future f;');
   }
 
   test_import_multiple_combinators() {
@@ skipping 30 matching lines @@
   }
 
   test_method_parameter_return_type() {
     checkLibrary('class C { f(int g()) {} }');
   }
 
   test_method_parameter_return_type_void() {
     checkLibrary('class C { f(void g()) {} }');
   }
 
+  test_operator() {
+    checkLibrary('class C { C operator+(C other) => null; }');
+  }
+
+  test_operator_external() {
+    checkLibrary('class C { external C operator+(C other); }');
+  }
+
   test_operator_index() {
     checkLibrary('class C { bool operator[](int i) => null; }');
   }
 
   test_operator_index_set() {
     checkLibrary('class C { void operator[]=(int i, bool v) {} }');
   }
 
   test_parts() {
     addNamedSource('/a.dart', 'part of my.lib;');
     addNamedSource('/b.dart', 'part of my.lib;');
     checkLibrary('library my.lib; part "a.dart"; part "b.dart";');
   }
 
+  test_setter_external() {
+    checkLibrary('external void set x(int value);');
+  }
+
   test_setters() {
     checkLibrary('void set x(int value) {} set y(value) {}');
   }
 
   test_type_arguments_explicit() {
     checkLibrary('Map<String, int> m;');
   }
 
   test_type_arguments_implicit() {
     checkLibrary('Map m;');
@@ skipping 175 matching lines @@
   }
 
   test_variable_const() {
     checkLibrary('const int i = 0;');
   }
 
   test_variables() {
     checkLibrary('int i; int j;');
   }
 }