angular-docs-cn/modules/angular2/test/di/binding_dart_spec.dart

61 lines
1.5 KiB
Dart

/// This file contains tests that make sense only in Dart world, such as
/// verifying that things are valid constants.
library angular2.test.di.binding_dart_spec;
import 'dart:mirrors';
import 'package:angular2/test_lib.dart';
import 'package:angular2/di.dart';
main() {
describe('Binding', () {
it('can create constant from token', () {
expect(const Binding(Foo).token).toBe(Foo);
});
it('can create constant from class', () {
expect(const Binding(Foo, toClass: Bar).toClass).toBe(Bar);
});
it('can create constant from value', () {
expect(const Binding(Foo, toValue: 5).toValue).toBe(5);
});
it('can create constant from alias', () {
expect(const Binding(Foo, toAlias: Bar).toAlias).toBe(Bar);
});
it('can create constant from factory', () {
expect(const Binding(Foo, toFactory: fn).toFactory).toBe(fn);
});
it('can be used in annotation', () {
ClassMirror mirror = reflectType(Annotated);
var bindings = mirror.metadata[0].reflectee.bindings;
expect(bindings.length).toBe(5);
bindings.forEach((b) {
expect(b).toBeA(Binding);
});
});
});
}
class Foo {}
class Bar extends Foo {}
fn() => null;
class Annotation {
final List bindings;
const Annotation(this.bindings);
}
@Annotation(const [
const Binding(Foo),
const Binding(Foo, toClass: Bar),
const Binding(Foo, toValue: 5),
const Binding(Foo, toAlias: Bar),
const Binding(Foo, toFactory: fn)
])
class Annotated {}