386 lines
11 KiB
JavaScript
386 lines
11 KiB
JavaScript
import {isBlank, BaseException} from 'angular2/src/facade/lang';
|
|
import {describe, ddescribe, it, iit, expect, beforeEach} from 'angular2/test_lib';
|
|
import {Injector, Inject, InjectLazy, Optional, bind, ResolvedBinding} from 'angular2/di';
|
|
|
|
class Engine {
|
|
}
|
|
|
|
class BrokenEngine {
|
|
constructor() {
|
|
throw new BaseException("Broken Engine");
|
|
}
|
|
}
|
|
|
|
class DashboardSoftware {
|
|
}
|
|
|
|
class Dashboard {
|
|
constructor(software: DashboardSoftware) {}
|
|
}
|
|
|
|
class TurboEngine extends Engine {
|
|
}
|
|
|
|
class Car {
|
|
engine:Engine;
|
|
constructor(engine:Engine) {
|
|
this.engine = engine;
|
|
}
|
|
}
|
|
|
|
class CarWithLazyEngine {
|
|
engineFactory;
|
|
constructor(@InjectLazy(Engine) engineFactory) {
|
|
this.engineFactory = engineFactory;
|
|
}
|
|
}
|
|
|
|
class CarWithOptionalEngine {
|
|
engine;
|
|
constructor(@Optional() engine:Engine) {
|
|
this.engine = engine;
|
|
}
|
|
}
|
|
|
|
class CarWithDashboard {
|
|
engine:Engine;
|
|
dashboard:Dashboard;
|
|
constructor(engine:Engine, dashboard:Dashboard) {
|
|
this.engine = engine;
|
|
this.dashboard = dashboard;
|
|
}
|
|
}
|
|
|
|
class SportsCar extends Car {
|
|
engine:Engine;
|
|
constructor(engine:Engine) {
|
|
super(engine);
|
|
}
|
|
}
|
|
|
|
class CarWithInject {
|
|
engine:Engine;
|
|
constructor(@Inject(TurboEngine) engine:Engine) {
|
|
this.engine = engine;
|
|
}
|
|
}
|
|
|
|
class CyclicEngine {
|
|
constructor(car:Car) {}
|
|
}
|
|
|
|
class NoAnnotations {
|
|
constructor(secretDependency) {}
|
|
}
|
|
|
|
export function main() {
|
|
describe('injector', function () {
|
|
it('should instantiate a class without dependencies', function () {
|
|
var injector = Injector.resolveAndCreate([Engine]);
|
|
var engine = injector.get(Engine);
|
|
|
|
expect(engine).toBeAnInstanceOf(Engine);
|
|
});
|
|
|
|
it('should resolve dependencies based on type information', function () {
|
|
var injector = Injector.resolveAndCreate([Engine, Car]);
|
|
var car = injector.get(Car);
|
|
|
|
expect(car).toBeAnInstanceOf(Car);
|
|
expect(car.engine).toBeAnInstanceOf(Engine);
|
|
});
|
|
|
|
it('should resolve dependencies based on @Inject annotation', function () {
|
|
var injector = Injector.resolveAndCreate([TurboEngine, Engine, CarWithInject]);
|
|
var car = injector.get(CarWithInject);
|
|
|
|
expect(car).toBeAnInstanceOf(CarWithInject);
|
|
expect(car.engine).toBeAnInstanceOf(TurboEngine);
|
|
});
|
|
|
|
it('should throw when no type and not @Inject', function () {
|
|
expect(() => Injector.resolveAndCreate([NoAnnotations])).toThrowError(
|
|
'Cannot resolve all parameters for NoAnnotations. '+
|
|
'Make sure they all have valid type or annotations.');
|
|
});
|
|
|
|
it('should cache instances', function () {
|
|
var injector = Injector.resolveAndCreate([Engine]);
|
|
|
|
var e1 = injector.get(Engine);
|
|
var e2 = injector.get(Engine);
|
|
|
|
expect(e1).toBe(e2);
|
|
});
|
|
|
|
it('should bind to a value', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
bind(Engine).toValue("fake engine")
|
|
]);
|
|
|
|
var engine = injector.get(Engine);
|
|
expect(engine).toEqual("fake engine");
|
|
});
|
|
|
|
it('should bind to a factory', function () {
|
|
function sportsCarFactory(e:Engine) {
|
|
return new SportsCar(e);
|
|
}
|
|
|
|
var injector = Injector.resolveAndCreate([
|
|
Engine,
|
|
bind(Car).toFactory(sportsCarFactory)
|
|
]);
|
|
|
|
var car = injector.get(Car);
|
|
expect(car).toBeAnInstanceOf(SportsCar);
|
|
expect(car.engine).toBeAnInstanceOf(Engine);
|
|
});
|
|
|
|
it('should bind to an alias', function() {
|
|
var injector = Injector.resolveAndCreate([
|
|
Engine,
|
|
bind(SportsCar).toClass(SportsCar),
|
|
bind(Car).toAlias(SportsCar)
|
|
]);
|
|
|
|
var car = injector.get(Car);
|
|
var sportsCar = injector.get(SportsCar);
|
|
expect(car).toBeAnInstanceOf(SportsCar);
|
|
expect(car).toBe(sportsCar);
|
|
});
|
|
|
|
it('should throw when the aliased binding does not exist', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
bind('car').toAlias(SportsCar)
|
|
]);
|
|
expect(() => injector.get('car')).toThrowError('No provider for SportsCar! (car -> SportsCar)');
|
|
});
|
|
|
|
it('should support overriding factory dependencies', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
Engine,
|
|
bind(Car).toFactory((e) => new SportsCar(e), [Engine])
|
|
]);
|
|
|
|
var car = injector.get(Car);
|
|
expect(car).toBeAnInstanceOf(SportsCar);
|
|
expect(car.engine).toBeAnInstanceOf(Engine);
|
|
});
|
|
|
|
it('should support optional dependencies', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
CarWithOptionalEngine
|
|
]);
|
|
|
|
var car = injector.get(CarWithOptionalEngine);
|
|
expect(car.engine).toEqual(null);
|
|
});
|
|
|
|
it("should flatten passed-in bindings", function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
[[Engine, Car]]
|
|
]);
|
|
|
|
var car = injector.get(Car);
|
|
expect(car).toBeAnInstanceOf(Car);
|
|
});
|
|
|
|
it("should use the last binding "+
|
|
"when there are mutliple bindings for same token", function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
bind(Engine).toClass(Engine),
|
|
bind(Engine).toClass(TurboEngine)
|
|
]);
|
|
|
|
expect(injector.get(Engine)).toBeAnInstanceOf(TurboEngine);
|
|
});
|
|
|
|
it('should use non-type tokens', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
bind('token').toValue('value')
|
|
]);
|
|
|
|
expect(injector.get('token')).toEqual('value');
|
|
});
|
|
|
|
it('should throw when given invalid bindings', function () {
|
|
expect(() => Injector.resolveAndCreate(["blah"]))
|
|
.toThrowError('Invalid binding - only instances of Binding and Type are allowed, got: blah');
|
|
expect(() => Injector.resolveAndCreate([bind("blah")]))
|
|
.toThrowError('Invalid binding - only instances of Binding and Type are allowed, ' +
|
|
'got: BindingBuilder with blah token');
|
|
});
|
|
|
|
it('should provide itself', function () {
|
|
var parent = Injector.resolveAndCreate([]);
|
|
var child = parent.resolveAndCreateChild([]);
|
|
|
|
expect(child.get(Injector)).toBe(child);
|
|
});
|
|
|
|
it('should throw when no provider defined', function () {
|
|
var injector = Injector.resolveAndCreate([]);
|
|
expect(() => injector.get('NonExisting')).toThrowError('No provider for NonExisting!');
|
|
});
|
|
|
|
it('should show the full path when no provider', function () {
|
|
var injector = Injector.resolveAndCreate([CarWithDashboard, Engine, Dashboard]);
|
|
expect(() => injector.get(CarWithDashboard)).
|
|
toThrowError('No provider for DashboardSoftware! (CarWithDashboard -> Dashboard -> DashboardSoftware)');
|
|
});
|
|
|
|
it('should throw when trying to instantiate a cyclic dependency', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
Car,
|
|
bind(Engine).toClass(CyclicEngine)
|
|
]);
|
|
|
|
expect(() => injector.get(Car))
|
|
.toThrowError('Cannot instantiate cyclic dependency! (Car -> Engine -> Car)');
|
|
|
|
expect(() => injector.asyncGet(Car))
|
|
.toThrowError('Cannot instantiate cyclic dependency! (Car -> Engine -> Car)');
|
|
});
|
|
|
|
it('should show the full path when error happens in a constructor', function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
Car,
|
|
bind(Engine).toClass(BrokenEngine)
|
|
]);
|
|
|
|
try {
|
|
injector.get(Car);
|
|
throw "Must throw";
|
|
} catch (e) {
|
|
expect(e.message).toContain("Error during instantiation of Engine! (Car -> Engine)");
|
|
expect(e.cause instanceof BaseException).toBeTruthy();
|
|
expect(e.causeKey.token).toEqual(Engine);
|
|
}
|
|
});
|
|
|
|
it('should instantiate an object after a failed attempt', function () {
|
|
var isBroken = true;
|
|
|
|
var injector = Injector.resolveAndCreate([
|
|
Car,
|
|
bind(Engine).toFactory(() => isBroken ? new BrokenEngine() : new Engine())
|
|
]);
|
|
|
|
expect(() => injector.get(Car)).toThrowError(new RegExp("Error"));
|
|
|
|
isBroken = false;
|
|
|
|
expect(injector.get(Car)).toBeAnInstanceOf(Car);
|
|
});
|
|
|
|
it('should support null values', () => {
|
|
var injector = Injector.resolveAndCreate([bind('null').toValue(null)]);
|
|
expect(injector.get('null')).toBe(null);
|
|
});
|
|
|
|
describe("default bindings", function () {
|
|
it("should be used when no matching binding found", function () {
|
|
var injector = Injector.resolveAndCreate([], {defaultBindings: true});
|
|
|
|
var car = injector.get(Car);
|
|
|
|
expect(car).toBeAnInstanceOf(Car);
|
|
});
|
|
|
|
it("should use the matching binding when it is available", function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
bind(Car).toClass(SportsCar)
|
|
], {defaultBindings: true});
|
|
|
|
var car = injector.get(Car);
|
|
|
|
expect(car).toBeAnInstanceOf(SportsCar);
|
|
});
|
|
});
|
|
|
|
describe("child", function () {
|
|
it('should load instances from parent injector', function () {
|
|
var parent = Injector.resolveAndCreate([Engine]);
|
|
var child = parent.resolveAndCreateChild([]);
|
|
|
|
var engineFromParent = parent.get(Engine);
|
|
var engineFromChild = child.get(Engine);
|
|
|
|
expect(engineFromChild).toBe(engineFromParent);
|
|
});
|
|
|
|
it("should not use the child bindings when resolving the dependencies of a parent binding", function () {
|
|
var parent = Injector.resolveAndCreate([
|
|
Car, Engine
|
|
]);
|
|
var child = parent.resolveAndCreateChild([
|
|
bind(Engine).toClass(TurboEngine)
|
|
]);
|
|
|
|
var carFromChild = child.get(Car);
|
|
expect(carFromChild.engine).toBeAnInstanceOf(Engine);
|
|
});
|
|
|
|
it('should create new instance in a child injector', function () {
|
|
var parent = Injector.resolveAndCreate([Engine]);
|
|
var child = parent.resolveAndCreateChild([
|
|
bind(Engine).toClass(TurboEngine)
|
|
]);
|
|
|
|
var engineFromParent = parent.get(Engine);
|
|
var engineFromChild = child.get(Engine);
|
|
|
|
expect(engineFromParent).not.toBe(engineFromChild);
|
|
expect(engineFromChild).toBeAnInstanceOf(TurboEngine);
|
|
});
|
|
|
|
it("should create child injectors without default bindings", function () {
|
|
var parent = Injector.resolveAndCreate([], {defaultBindings: true});
|
|
var child = parent.resolveAndCreateChild([]);
|
|
|
|
//child delegates to parent the creation of Car
|
|
var childCar = child.get(Car);
|
|
var parentCar = parent.get(Car);
|
|
|
|
expect(childCar).toBe(parentCar);
|
|
});
|
|
});
|
|
|
|
describe("lazy", function () {
|
|
it("should create dependencies lazily", function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
Engine,
|
|
CarWithLazyEngine
|
|
]);
|
|
|
|
var car = injector.get(CarWithLazyEngine);
|
|
expect(car.engineFactory()).toBeAnInstanceOf(Engine);
|
|
});
|
|
|
|
it("should cache instance created lazily", function () {
|
|
var injector = Injector.resolveAndCreate([
|
|
Engine,
|
|
CarWithLazyEngine
|
|
]);
|
|
|
|
var car = injector.get(CarWithLazyEngine);
|
|
var e1 = car.engineFactory();
|
|
var e2 = car.engineFactory();
|
|
|
|
expect(e1).toBe(e2);
|
|
});
|
|
});
|
|
|
|
describe('resolve', function() {
|
|
it('should resolve and flatten', function() {
|
|
var bindings = Injector.resolve([Engine, [BrokenEngine]]);
|
|
bindings.forEach(function(b) {
|
|
if (isBlank(b)) return; // the result is a sparse array
|
|
expect(b instanceof ResolvedBinding).toBe(true);
|
|
});
|
|
});
|
|
});
|
|
});
|
|
}
|