koa-lite/test/response/vary.js

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'use strict';
const context = require('../helpers/context');
describe('ctx.vary(field)', function(){
describe('when Vary is not set', function(){
it('should set it', function(){
const ctx = context();
ctx.vary('Accept');
ctx.response.header.vary.should.equal('Accept');
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});
});
describe('when Vary is set', function(){
it('should append', function(){
const ctx = context();
ctx.vary('Accept');
ctx.vary('Accept-Encoding');
ctx.response.header.vary.should.equal('Accept, Accept-Encoding');
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});
});
describe('when Vary already contains the value', function(){
it('should not append', function(){
const ctx = context();
ctx.vary('Accept');
ctx.vary('Accept-Encoding');
ctx.vary('Accept');
ctx.vary('Accept-Encoding');
ctx.response.header.vary.should.equal('Accept, Accept-Encoding');
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});
});
});