5b5d31fa9a
BREAKING CHANGE:
Instead of configuring pipes via a Pipes object, now you can configure them by providing the pipes property to the View decorator.
@Pipe({
name: 'double'
})
class DoublePipe {
transform(value, args) { return value * 2; }
}
@View({
template: '{{ 10 | double}}'
pipes: [DoublePipe]
})
class CustomComponent {}
Closes #3572
58 lines
1.7 KiB
TypeScript
58 lines
1.7 KiB
TypeScript
import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach} from 'angular2/test_lib';
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import {LimitToPipe} from 'angular2/pipes';
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export function main() {
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describe("LimitToPipe", () => {
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var list;
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var str;
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var pipe;
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beforeEach(() => {
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list = [1, 2, 3, 4, 5];
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str = 'tuvwxyz';
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pipe = new LimitToPipe();
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});
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describe("supports", () => {
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it("should support strings", () => { expect(pipe.supports(str)).toBe(true); });
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it("should support lists", () => { expect(pipe.supports(list)).toBe(true); });
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it("should not support other objects", () => {
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expect(pipe.supports(new Object())).toBe(false);
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expect(pipe.supports(null)).toBe(false);
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});
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});
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describe("transform", () => {
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it('should return the first X items when X is positive', () => {
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expect(pipe.transform(list, [3])).toEqual([1, 2, 3]);
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expect(pipe.transform(str, [3])).toEqual('tuv');
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});
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it('should return the last X items when X is negative', () => {
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expect(pipe.transform(list, [-3])).toEqual([3, 4, 5]);
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expect(pipe.transform(str, [-3])).toEqual('xyz');
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});
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it('should return a copy of input array if X is exceeds array length', () => {
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expect(pipe.transform(list, [20])).toEqual(list);
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expect(pipe.transform(list, [-20])).toEqual(list);
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});
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it('should return the entire string if X exceeds input length', () => {
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expect(pipe.transform(str, [20])).toEqual(str);
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expect(pipe.transform(str, [-20])).toEqual(str);
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});
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it('should not modify the input list', () => {
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expect(pipe.transform(list, [3])).toEqual([1, 2, 3]);
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expect(list).toEqual([1, 2, 3, 4, 5]);
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});
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});
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});
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}
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