angular-cn/modules/@angular/forms/test/validators_spec.ts

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {fakeAsync, tick} from '@angular/core/testing';
import {describe, expect, it} from '@angular/core/testing/testing_internal';
import {AbstractControl, FormControl, Validators} from '@angular/forms';
import {Observable} from 'rxjs/Observable';
import {normalizeAsyncValidator} from '../src/directives/normalize_validator';
import {EventEmitter} from '../src/facade/async';
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export function main() {
function validator(key: string, error: any) {
return function(c: AbstractControl) {
var r: {[k: string]: string} = {};
r[key] = error;
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return r;
};
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}
class AsyncValidatorDirective {
constructor(private expected: string, private error: any) {}
validate(c: any): {[key: string]: any;} {
return Observable.create((obs: any) => {
const error = this.expected !== c.value ? this.error : null;
obs.next(error);
obs.complete();
});
}
}
describe('Validators', () => {
describe('required', () => {
it('should error on an empty string',
() => { expect(Validators.required(new FormControl(''))).toEqual({'required': true}); });
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it('should error on null',
() => { expect(Validators.required(new FormControl(null))).toEqual({'required': true}); });
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it('should not error on a non-empty string',
() => { expect(Validators.required(new FormControl('not empty'))).toEqual(null); });
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it('should accept zero as valid',
() => { expect(Validators.required(new FormControl(0))).toEqual(null); });
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});
describe('minLength', () => {
it('should not error on an empty string',
() => { expect(Validators.minLength(2)(new FormControl(''))).toEqual(null); });
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it('should not error on null',
() => { expect(Validators.minLength(2)(new FormControl(null))).toEqual(null); });
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it('should not error on valid strings',
() => { expect(Validators.minLength(2)(new FormControl('aa'))).toEqual(null); });
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it('should error on short strings', () => {
expect(Validators.minLength(2)(new FormControl('a'))).toEqual({
'minlength': {'requiredLength': 2, 'actualLength': 1}
});
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});
});
describe('maxLength', () => {
it('should not error on an empty string',
() => { expect(Validators.maxLength(2)(new FormControl(''))).toEqual(null); });
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it('should not error on null',
() => { expect(Validators.maxLength(2)(new FormControl(null))).toEqual(null); });
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it('should not error on valid strings',
() => { expect(Validators.maxLength(2)(new FormControl('aa'))).toEqual(null); });
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it('should error on long strings', () => {
expect(Validators.maxLength(2)(new FormControl('aaa'))).toEqual({
'maxlength': {'requiredLength': 2, 'actualLength': 3}
});
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});
});
describe('pattern', () => {
it('should not error on an empty string',
() => { expect(Validators.pattern('[a-zA-Z ]*')(new FormControl(''))).toEqual(null); });
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it('should not error on null',
() => { expect(Validators.pattern('[a-zA-Z ]*')(new FormControl(null))).toEqual(null); });
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it('should not error on valid strings', () => {
expect(Validators.pattern('[a-zA-Z ]*')(new FormControl('aaAA'))).toEqual(null);
});
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it('should error on failure to match string', () => {
expect(Validators.pattern('[a-zA-Z ]*')(new FormControl('aaa0'))).toEqual({
'pattern': {'requiredPattern': '^[a-zA-Z ]*$', 'actualValue': 'aaa0'}
});
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});
});
describe('compose', () => {
it('should return null when given null',
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() => { expect(Validators.compose(null)).toBe(null); });
it('should collect errors from all the validators', () => {
var c = Validators.compose([validator('a', true), validator('b', true)]);
expect(c(new FormControl(''))).toEqual({'a': true, 'b': true});
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});
it('should run validators left to right', () => {
var c = Validators.compose([validator('a', 1), validator('a', 2)]);
expect(c(new FormControl(''))).toEqual({'a': 2});
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});
it('should return null when no errors', () => {
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var c = Validators.compose([Validators.nullValidator, Validators.nullValidator]);
expect(c(new FormControl(''))).toEqual(null);
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});
it('should ignore nulls', () => {
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var c = Validators.compose([null, Validators.required]);
expect(c(new FormControl(''))).toEqual({'required': true});
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});
});
describe('composeAsync', () => {
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function asyncValidator(expected: any /** TODO #9100 */, response: any /** TODO #9100 */) {
return (c: any /** TODO #9100 */) => {
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var emitter = new EventEmitter();
var res = c.value != expected ? response : null;
Promise.resolve(null).then(() => {
emitter.emit(res);
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// this is required because of a bug in ObservableWrapper
// where callComplete can fire before callEmit
// remove this one the bug is fixed
setTimeout(() => { emitter.complete(); }, 0);
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});
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return emitter;
};
}
it('should return null when given null',
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() => { expect(Validators.composeAsync(null)).toEqual(null); });
it('should collect errors from all the validators', fakeAsync(() => {
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var c = Validators.composeAsync([
asyncValidator('expected', {'one': true}), asyncValidator('expected', {'two': true})
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]);
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var value: any /** TODO #9100 */ = null;
(<Promise<any>>c(new FormControl('invalid'))).then(v => value = v);
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tick(1);
expect(value).toEqual({'one': true, 'two': true});
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}));
it('should normalize and evaluate async validator-directives correctly', fakeAsync(() => {
const c = Validators.composeAsync(
[normalizeAsyncValidator(new AsyncValidatorDirective('expected', {'one': true}))]);
let value: any = null;
c(new FormControl()).then((v: any) => value = v);
tick(1);
expect(value).toEqual({'one': true});
}));
it('should return null when no errors', fakeAsync(() => {
var c = Validators.composeAsync([asyncValidator('expected', {'one': true})]);
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var value: any /** TODO #9100 */ = null;
(<Promise<any>>c(new FormControl('expected'))).then(v => value = v);
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tick(1);
expect(value).toEqual(null);
}));
it('should ignore nulls', fakeAsync(() => {
var c = Validators.composeAsync([asyncValidator('expected', {'one': true}), null]);
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var value: any /** TODO #9100 */ = null;
(<Promise<any>>c(new FormControl('invalid'))).then(v => value = v);
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tick(1);
expect(value).toEqual({'one': true});
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}));
});
});
}