75 lines
2.6 KiB
TypeScript
75 lines
2.6 KiB
TypeScript
import {ddescribe, describe, it, iit, xit, expect, beforeEach, afterEach} from 'angular2/test_lib';
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import {SlicePipe} from 'angular2/src/core/pipes';
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export function main() {
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describe("SlicePipe", () => {
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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 SlicePipe();
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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 all items after START index when START is positive and END is omitted',
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() => {
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expect(pipe.transform(list, [3])).toEqual([4, 5]);
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expect(pipe.transform(str, [3])).toEqual('wxyz');
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});
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it('should return last START items when START is negative and END is omitted', () => {
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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 all items between START and END index when START and END are positive',
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() => {
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expect(pipe.transform(list, [1, 3])).toEqual([2, 3]);
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expect(pipe.transform(str, [1, 3])).toEqual('uv');
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});
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it('should return all items between START and END from the end when START and END are negative',
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() => {
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expect(pipe.transform(list, [-4, -2])).toEqual([2, 3]);
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expect(pipe.transform(str, [-4, -2])).toEqual('wx');
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});
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it('should return an empty value if START is greater than END', () => {
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expect(pipe.transform(list, [4, 2])).toEqual([]);
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expect(pipe.transform(str, [4, 2])).toEqual('');
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});
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it('should return an empty value if START greater than input length', () => {
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expect(pipe.transform(list, [99])).toEqual([]);
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expect(pipe.transform(str, [99])).toEqual('');
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});
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it('should return entire input if START is negative and greater than input length', () => {
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expect(pipe.transform(list, [-99])).toEqual([1, 2, 3, 4, 5]);
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expect(pipe.transform(str, [-99])).toEqual('tuvwxyz');
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});
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it('should not modify the input list', () => {
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expect(pipe.transform(list, [2])).toEqual([3, 4, 5]);
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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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} |