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'use strict';
describe('injector', function() {
var providers;
var injector;
beforeEach(function() {
providers = extensionMap({}, 'providers');
injector = createInjector(providers);
});
it("should return same instance from calling provider", function() {
var instance = {},
original = instance;
providers('instance', function() { return instance; });
expect(injector('instance')).toEqual(instance);
instance = 'deleted';
expect(injector('instance')).toEqual(original);
});
it("should call function", function() {
providers('a', function() {return 1;});
providers('b', function() {return 2;});
var args;
function fn(a, b, c, d) {
args = [this, a, b, c, d];
}
fn.$inject = ['a', 'b'];
injector.invoke({name:"this"}, fn, [3, 4]);
expect(args).toEqual([{name:'this'}, 1, 2, 3, 4]);
});
it('should inject providers', function() {
providers('a', function() {return 'Mi';});
providers('b', function(mi){return mi+'sko';}, {$inject:['a']});
expect(injector('b')).toEqual('Misko');
});
it('should resolve dependency graph and instantiate all services just once', function() {
var log = [];
// s1
// / |\
// / s2\
// / / | \\
// /s3 < s4 > s5
// //
// s6
providers('s1', function() { log.push('s1'); }, {$inject: ['s2', 's5', 's6']});
providers('s2', function() { log.push('s2'); }, {$inject: ['s3', 's4', 's5']});
providers('s3', function() { log.push('s3'); }, {$inject: ['s6']});
providers('s4', function() { log.push('s4'); }, {$inject: ['s3', 's5']});
providers('s5', function() { log.push('s5'); });
providers('s6', function() { log.push('s6'); });
injector('s1');
expect(log).toEqual(['s6', 's5', 's3', 's4', 's2', 's1']);
});
it('should provide usefull message if no provider', function() {
expect(function() {
injector('idontexist');
}).toThrow("Unknown provider for 'idontexist'.");
});
it('should autostart eager services', function() {
var log = '';
providers('eager', function() {log += 'eager;'; return 'foo';}, {$eager: true});
injector = createInjector(providers);
expect(log).toEqual('eager;');
expect(injector('eager')).toBe('foo');
});
describe('annotation', function() {
it('should return $inject', function() {
function fn() {}
fn.$inject = ['a'];
expect(inferInjectionArgs(fn)).toBe(fn.$inject);
expect(inferInjectionArgs(function() {})).toEqual([]);
expect(inferInjectionArgs(function () {})).toEqual([]);
expect(inferInjectionArgs(function () {})).toEqual([]);
expect(inferInjectionArgs(function /* */ () {})).toEqual([]);
});
it('should create $inject', function() {
// keep the multi-line to make sure we can handle it
function $f_n0 /*
*/(
$a, // x, <-- looks like an arg but it is a comment
b_, /* z, <-- looks like an arg but it is a
multi-line comment
function (a, b){}
*/
_c,
/* {some type} */ d){ extraParans();}
expect(inferInjectionArgs($f_n0)).toEqual(['$a', 'b_', '_c', 'd']);
expect($f_n0.$inject).toEqual(['$a', 'b_', '_c', 'd']);
});
it('should handle no arg functions', function() {
function $f_n0() {}
expect(inferInjectionArgs($f_n0)).toEqual([]);
expect($f_n0.$inject).toEqual([]);
});
it('should handle args with both $ and _', function() {
function $f_n0($a_){}
expect(inferInjectionArgs($f_n0)).toEqual(['$a_']);
expect($f_n0.$inject).toEqual(['$a_']);
});
it('should throw on non function arg', function() {
expect(function() {
inferInjectionArgs({});
}).toThrow();
});
it('should infer injection on services', function() {
var $injector = createInjector({
a: function() { return 'a';},
b: function(a){ return a + 'b';}
});
expect($injector('b')).toEqual('ab');
});
});
describe('inject', function() {
it('should inject names', function() {
expect(annotate('a', {}).$inject).toEqual(['a']);
expect(annotate('a', 'b', {}).$inject).toEqual(['a', 'b']);
});
it('should inject array', function() {
expect(annotate(['a'], {}).$inject).toEqual(['a']);
expect(annotate(['a', 'b'], {}).$inject).toEqual(['a', 'b']);
});
});
});
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