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describe('Array', function(){
describe('.push()', function(){
it('should append a value', function(){
var arr = [];
arr.push('foo');
arr.push('bar');
expect(arr[0]).to.equal('foo');
expect(arr[1]).to.equal('bar');
})
it('should return the length', function(){
var arr = [];
var n = arr.push('foo');
expect(n).to.equal(1);
var n = arr.push('bar');
expect(n).to.equal(2);
})
describe('with many arguments', function(){
it('should add the values', function(){
var arr = [];
arr.push('foo', 'bar');
expect(arr[0]).to.equal('foo');
expect(arr[1]).to.equal('bar');
})
})
})
describe('.unshift()', function(){
it('should prepend a value', function(){
var arr = [1,2,3];
arr.unshift('foo');
expect(arr[0]).to.equal('foo');
expect(arr[1]).to.equal(1);
})
it('should return the length', function(){
var arr = [];
var n = arr.unshift('foo');
expect(n).to.equal(1);
var n = arr.unshift('bar');
expect(n).to.equal(2);
})
describe('with many arguments', function(){
it('should add the values', function(){
var arr = [];
arr.unshift('foo', 'bar');
expect(arr[0]).to.equal('foo');
expect(arr[1]).to.equal('bar');
})
})
})
describe('.pop()', function(){
it('should remove and return the last value', function(){
var arr = [1,2,3];
expect(arr.pop()).to.equal(3);
expect(arr.pop()).to.equal(2);
expect(arr).to.have.length(1);
})
})
describe('.shift()', function(){
it('should remove and return the first value', function(){
var arr = [1,2,3];
expect(arr.shift()).to.equal(1);
expect(arr.shift()).to.equal(2);
expect(arr).to.have.length(1);
})
})
})
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