263 lines
6.1 KiB
JavaScript
263 lines
6.1 KiB
JavaScript
goog.provide('ol.test.structs.Buffer');
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describe('ol.structs.Buffer', function() {
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describe('constructor', function() {
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describe('without an argument', function() {
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var b;
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beforeEach(function() {
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b = new ol.structs.Buffer();
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});
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it('constructs an empty instance', function() {
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expect(b.getArray()).to.be.empty();
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expect(b.getCount()).to.be(0);
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});
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});
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describe('with a single array argument', function() {
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var b;
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beforeEach(function() {
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b = new ol.structs.Buffer([0, 1, 2, 3]);
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});
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it('constructs a populated instance', function() {
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expect(b.getArray()).to.eql([0, 1, 2, 3]);
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});
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});
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});
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describe('with an empty instance', function() {
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var b;
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beforeEach(function() {
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b = new ol.structs.Buffer();
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});
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describe('forEachRange', function() {
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it('does not call the callback', function() {
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var callback = sinon.spy();
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b.forEachRange(callback);
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expect(callback).not.to.be.called();
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});
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});
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describe('getArray', function() {
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it('returns an empty array', function() {
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expect(b.getArray()).to.be.empty();
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});
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});
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describe('getCount', function() {
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it('returns 0', function() {
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expect(b.getCount()).to.be(0);
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});
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});
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});
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describe('with an empty instance with spare capacity', function() {
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var b;
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beforeEach(function() {
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b = new ol.structs.Buffer(new Array(4), 0);
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});
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describe('add', function() {
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it('allows elements to be added', function() {
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expect(b.add([0, 1, 2, 3])).to.be(0);
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expect(b.getArray()).to.eql([0, 1, 2, 3]);
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});
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});
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describe('forEachRange', function() {
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it('does not call the callback', function() {
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var callback = sinon.spy();
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b.forEachRange(callback);
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expect(callback).not.to.be.called();
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});
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});
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describe('getCount', function() {
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it('returns 0', function() {
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expect(b.getCount()).to.be(0);
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});
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});
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});
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describe('with an instance with no spare capacity', function() {
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var b;
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beforeEach(function() {
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b = new ol.structs.Buffer([0, 1, 2, 3]);
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});
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describe('add', function() {
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it('throws an exception', function() {
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expect(function() {
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b.add([4, 5]);
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}).to.throwException();
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});
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});
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describe('forEachRange', function() {
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it('calls the callback', function() {
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var callback = sinon.spy();
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b.forEachRange(callback);
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expect(callback.calledOnce).to.be(true);
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expect(callback.args[0]).to.eql([0, 4]);
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});
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});
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describe('getCount', function() {
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it('returns the expected value', function() {
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expect(b.getCount()).to.be(4);
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});
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});
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describe('remove', function() {
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it('allows items to be removes', function() {
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expect(function() {
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b.remove(4, 2);
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}).to.not.throwException();
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});
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});
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describe('set', function() {
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it('updates the items', function() {
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b.set([5, 6], 2);
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expect(b.getArray()).to.eql([0, 1, 5, 6]);
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});
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it('marks the set items as dirty', function() {
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var dirtySet = new ol.structs.IntegerSet();
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b.addDirtySet(dirtySet);
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expect(dirtySet.isEmpty()).to.be(true);
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b.set([5, 6], 2);
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expect(dirtySet.isEmpty()).to.be(false);
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expect(dirtySet.getArray()).to.eql([2, 4]);
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});
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});
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});
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describe('with an instance with spare capacity', function() {
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var b;
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beforeEach(function() {
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var arr = [0, 1, 2, 3];
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arr.length = 8;
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b = new ol.structs.Buffer(arr, 4);
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});
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describe('add', function() {
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it('allows more items to be added', function() {
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expect(b.add([4, 5, 6, 7])).to.be(4);
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expect(b.getArray()).to.eql([0, 1, 2, 3, 4, 5, 6, 7]);
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});
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});
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describe('forEachRange', function() {
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it('calls the callback with the expected values', function() {
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var callback = sinon.spy();
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b.forEachRange(callback);
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expect(callback.calledOnce).to.be(true);
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expect(callback.args[0]).to.eql([0, 4]);
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});
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});
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describe('getCount', function() {
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it('returns the expected value', function() {
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expect(b.getCount()).to.be(4);
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});
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});
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describe('getFreeSet', function() {
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it('returns the expected set', function() {
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var freeSet = b.getFreeSet();
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expect(freeSet.isEmpty()).to.be(false);
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expect(freeSet.getArray()).to.eql([4, 8]);
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});
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});
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});
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describe('usage tests', function() {
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it('allows multiple adds and removes', function() {
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var b = new ol.structs.Buffer(new Array(8), 0);
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expect(b.add([0, 1])).to.be(0);
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expect(b.getArray()).to.eql([0, 1, NaN, NaN, NaN, NaN, NaN, NaN]);
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expect(b.getCount()).to.be(2);
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expect(b.add([2, 3, 4, 5])).to.be(2);
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expect(b.getArray()).to.eql([0, 1, 2, 3, 4, 5, NaN, NaN]);
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expect(b.getCount()).to.be(6);
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expect(b.add([6, 7])).to.be(6);
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expect(b.getArray()).to.eql([0, 1, 2, 3, 4, 5, 6, 7]);
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expect(b.getCount()).to.be(8);
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b.remove(2, 2);
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expect(b.getArray()).to.eql([0, 1, NaN, NaN, 4, 5, 6, 7]);
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expect(b.getCount()).to.be(6);
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expect(b.add([8, 9])).to.be(2);
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expect(b.getArray()).to.eql([0, 1, 8, 9, 4, 5, 6, 7]);
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expect(b.getCount()).to.be(8);
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b.remove(1, 1);
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expect(b.getArray()).to.eql([0, NaN, 8, 9, 4, 5, 6, 7]);
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expect(b.getCount()).to.be(7);
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b.remove(4, 4);
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expect(b.getArray()).to.eql([0, NaN, 8, 9, NaN, NaN, NaN, NaN]);
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expect(b.getCount()).to.be(3);
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expect(b.add([10, 11, 12])).to.be(4);
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expect(b.getArray()).to.eql([0, NaN, 8, 9, 10, 11, 12, NaN]);
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expect(b.getCount()).to.be(6);
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expect(b.add([13])).to.be(1);
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expect(b.getArray()).to.eql([0, 13, 8, 9, 10, 11, 12, NaN]);
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expect(b.getCount()).to.be(7);
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});
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});
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});
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goog.require('ol.structs.Buffer');
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goog.require('ol.structs.IntegerSet');
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