angular-cn/modules/angular2/test/common/pipes/replace_pipe_spec.ts

import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach, browserDetection, inject, TestComponentBuilder, AsyncTestCompleter} from 'angular2/testing_internal';

import {ReplacePipe} from 'angular2/common';
import {RegExpWrapper, StringJoiner} from 'angular2/src/facade/lang';

export function main() {
  describe('ReplacePipe', () => {
    var someNumber: number;
    var str;
    var pipe;

    beforeEach(() => {
      someNumber = 42;
      str = 'Douglas Adams';
      pipe = new ReplacePipe();
    });

    describe('transform', () => {

      it('should not support input other than strings and numbers', () => {
        expect(() => pipe.transform({}, ['Douglas', 'Hugh'])).toThrow();
        expect(() => pipe.transform([1, 2, 3], ['Douglas', 'Hugh'])).toThrow();
      });

      it('should not support patterns other than strings and regular expressions', () => {
        expect(() => pipe.transform(str, [{}, 'Hugh'])).toThrow();
        expect(() => pipe.transform(str, [null, 'Hugh'])).toThrow();
        expect(() => pipe.transform(str, [123, 'Hugh'])).toThrow();
      });

      it('should not support replacements other than strings and functions', () => {
        expect(() => pipe.transform(str, ['Douglas', {}])).toThrow();
        expect(() => pipe.transform(str, ['Douglas', null])).toThrow();
        expect(() => pipe.transform(str, ['Douglas', 123])).toThrow();
      });

      it('should return a new string with the pattern replaced', () => {
        var result1 = pipe.transform(str, ['Douglas', 'Hugh']);

        var result2 = pipe.transform(str, [RegExpWrapper.create('a'), '_']);

        var result3 = pipe.transform(str, [RegExpWrapper.create('a', 'i'), '_']);

        var f = (x => { return 'Adams!'; });

        var result4 = pipe.transform(str, ['Adams', f]);

        var result5 = pipe.transform(someNumber, ['2', '4']);

        expect(result1).toEqual('Hugh Adams');
        expect(result2).toEqual('Dougl_s Ad_ms');
        expect(result3).toEqual('Dougl_s _d_ms');
        expect(result4).toEqual('Douglas Adams!');
        expect(result5).toEqual('44');
      });

    });

  });
}