blob: 68033f50b44a709c8477f3ad7b6d514f0e3c14ae [file] [log] [blame]
// Copyright (c) 2017, 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.
// @dart = 2.9
// Test that if the type of a parameter of a generic method is a type parameter,
// the type of the passed argument is checked (01) at compile time
// if the receiver is given via an interface-type variable, and (02) at runtime
// if the receiver is dynamic.
library generic_methods_dynamic_test;
import "package:expect/expect.dart";
class A {}
class B {}
class C {
T foo<T>(T t) => t;
List<T> bar<T>(Iterable<T> t) => <T>[t.first];
}
main() {
B b = new B();
C c = new C();
dynamic obj = c;
c.foo<A>(b); //# 01: compile-time error
obj.foo<A>(b); //# 02: runtime error
c.bar<A>(<B>[new B()]); //# 03: compile-time error
obj.bar<A>(<B>[new B()]); //# 04: runtime error
Expect.equals(c.foo<B>(b), b); //# 05: ok
Expect.equals(obj.foo<B>(b), b); //# 05: continued
dynamic x = c.bar<B>(<B>[new B()]); //# 05: continued
Expect.isTrue(x is List<B>); //# 05: continued
Expect.equals(x.length, 1); //# 05: continued
dynamic y = obj.bar<B>(<B>[new B()]); //# 05: continued
Expect.isTrue(y is List<B>); //# 05: continued
Expect.equals(y.length, 1); //# 05: continued
}