openlayers
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Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.test.extent');
goog.require('ol.extent');
goog.require('ol.proj');
describe('ol.extent', function() {
describe('buffer', function() {
it('buffers an extent by some value', function() {
var extent = [-10, -20, 10, 20];
expect(ol.extent.buffer(extent, 15)).to.eql([-25, -35, 25, 35]);
});
});
describe('clone', function() {
it('creates a copy of an extent', function() {
var extent = ol.extent.createOrUpdate(1, 2, 3, 4);
var clone = ol.extent.clone(extent);
expect(ol.extent.equals(extent, clone)).to.be(true);
ol.extent.extendCoordinate(extent, [10, 20]);
expect(ol.extent.equals(extent, clone)).to.be(false);
});
});
describe('closestSquaredDistanceXY', function() {
it('returns correct result when x left of extent', function() {
var extent = ol.extent.createOrUpdate(0, 0, 1, 1);
var x = -2;
var y = 0;
expect(ol.extent.closestSquaredDistanceXY(extent, x, y)).to.be(4);
});
it('returns correct result when x right of extent', function() {
var extent = ol.extent.createOrUpdate(0, 0, 1, 1);
var x = 3;
var y = 0;
expect(ol.extent.closestSquaredDistanceXY(extent, x, y)).to.be(4);
});
it('returns correct result for other x values', function() {
var extent = ol.extent.createOrUpdate(0, 0, 1, 1);
var x = 0.5;
var y = 3;
expect(ol.extent.closestSquaredDistanceXY(extent, x, y)).to.be(4);
});
it('returns correct result when y below extent', function() {
var extent = ol.extent.createOrUpdate(0, 0, 1, 1);
var x = 0;
var y = -2;
expect(ol.extent.closestSquaredDistanceXY(extent, x, y)).to.be(4);
});
it('returns correct result when y above extent', function() {
var extent = ol.extent.createOrUpdate(0, 0, 1, 1);
var x = 0;
var y = 3;
expect(ol.extent.closestSquaredDistanceXY(extent, x, y)).to.be(4);
});
it('returns correct result for other y values', function() {
var extent = ol.extent.createOrUpdate(0, 0, 1, 1);
var x = 3;
var y = 0.5;
expect(ol.extent.closestSquaredDistanceXY(extent, x, y)).to.be(4);
});
});
describe('createOrUpdateFromCoordinate', function() {
it('works when no extent passed', function() {
var coords = [0, 1];
var expected = [0, 1, 0, 1];
var got = ol.extent.createOrUpdateFromCoordinate(coords);
expect(got).to.eql(expected);
});
it('updates a passed extent', function() {
var extent = ol.extent.createOrUpdate(-4, -7, -3, -6);
var coords = [0, 1];
var expected = [0, 1, 0, 1];
ol.extent.createOrUpdateFromCoordinate(coords, extent);
expect(extent).to.eql(expected);
});
});
describe('createOrUpdateFromCoordinates', function() {
it('works when single coordinate and no extent passed', function() {
var coords = [[0, 1]];
var expected = [0, 1, 0, 1];
var got = ol.extent.createOrUpdateFromCoordinates(coords);
expect(got).to.eql(expected);
});
it('changes the passed extent when single coordinate', function() {
var extent = ol.extent.createOrUpdate(-4, -7, -3, -6);
var coords = [[0, 1]];
var expected = [0, 1, 0, 1];
ol.extent.createOrUpdateFromCoordinates(coords, extent);
expect(extent).to.eql(expected);
});
it('works when multiple coordinates and no extent passed', function() {
var coords = [[0, 1], [2, 3]];
var expected = [0, 1, 2, 3];
var got = ol.extent.createOrUpdateFromCoordinates(coords);
expect(got).to.eql(expected);
});
it('changes the passed extent when multiple coordinates given', function() {
var extent = ol.extent.createOrUpdate(-4, -7, -3, -6);
var coords = [[0, 1], [-2, -1]];
var expected = [-2, -1, 0, 1];
ol.extent.createOrUpdateFromCoordinates(coords, extent);
expect(extent).to.eql(expected);
});
});
describe('createOrUpdateFromRings', function() {
it('works when single ring and no extent passed', function() {
var ring = [[0, 0], [0, 2], [2, 2], [2, 0], [0, 0]];
var rings = [ring];
var expected = [0, 0, 2, 2];
var got = ol.extent.createOrUpdateFromRings(rings);
expect(got).to.eql(expected);
});
it('changes the passed extent when single ring given', function() {
var ring = [[0, 0], [0, 2], [2, 2], [2, 0], [0, 0]];
var rings = [ring];
var extent = [1, 1, 4, 7];
var expected = [0, 0, 2, 2];
ol.extent.createOrUpdateFromRings(rings, extent);
expect(extent).to.eql(expected);
});
it('works when multiple rings and no extent passed', function() {
var ring1 = [[0, 0], [0, 2], [2, 2], [2, 0], [0, 0]];
var ring2 = [[1, 1], [1, 3], [3, 3], [3, 1], [1, 1]];
var rings = [ring1, ring2];
var expected = [0, 0, 3, 3];
var got = ol.extent.createOrUpdateFromRings(rings);
expect(got).to.eql(expected);
});
it('changes the passed extent when multiple rings given', function() {
var ring1 = [[0, 0], [0, 2], [2, 2], [2, 0], [0, 0]];
var ring2 = [[1, 1], [1, 3], [3, 3], [3, 1], [1, 1]];
var rings = [ring1, ring2];
var extent = [1, 1, 4, 7];
var expected = [0, 0, 3, 3];
ol.extent.createOrUpdateFromRings(rings, extent);
expect(extent).to.eql(expected);
});
});
describe('forEachCorner', function() {
var callbackFalse;
var callbackTrue;
beforeEach(function() {
callbackFalse = sinon.spy(function() {
return false;
});
callbackTrue = sinon.spy(function() {
return true;
});
});
it('calls the passed callback for each corner', function() {
var extent = [1, 2, 3, 4];
ol.extent.forEachCorner(extent, callbackFalse);
expect(callbackFalse.callCount).to.be(4);
});
it('calls the passed callback with each corner', function() {
var extent = [1, 2, 3, 4];
ol.extent.forEachCorner(extent, callbackFalse);
var firstCallFirstArg = callbackFalse.args[0][0];
var secondCallFirstArg = callbackFalse.args[1][0];
var thirdCallFirstArg = callbackFalse.args[2][0];
var fourthCallFirstArg = callbackFalse.args[3][0];
expect(firstCallFirstArg).to.eql([1, 2]); // bl
expect(secondCallFirstArg).to.eql([3, 2]); // br
expect(thirdCallFirstArg).to.eql([3, 4]); // tr
expect(fourthCallFirstArg).to.eql([1, 4]); // tl
});
it('calls a truthy callback only once', function() {
var extent = [1, 2, 3, 4];
ol.extent.forEachCorner(extent, callbackTrue);
expect(callbackTrue.callCount).to.be(1);
});
it('ensures that any corner can cancel the callback execution', function() {
var extent = [1, 2, 3, 4];
var bottomLeftSpy = sinon.spy(function(corner) {
return (corner[0] === 1 && corner[1] === 2) ? true : false;
});
var bottomRightSpy = sinon.spy(function(corner) {
return (corner[0] === 3 && corner[1] === 2) ? true : false;
});
var topRightSpy = sinon.spy(function(corner) {
return (corner[0] === 3 && corner[1] === 4) ? true : false;
});
var topLeftSpy = sinon.spy(function(corner) {
return (corner[0] === 1 && corner[1] === 4) ? true : false;
});
ol.extent.forEachCorner(extent, bottomLeftSpy);
ol.extent.forEachCorner(extent, bottomRightSpy);
ol.extent.forEachCorner(extent, topRightSpy);
ol.extent.forEachCorner(extent, topLeftSpy);
expect(bottomLeftSpy.callCount).to.be(1);
expect(bottomRightSpy.callCount).to.be(2);
expect(topRightSpy.callCount).to.be(3);
expect(topLeftSpy.callCount).to.be(4);
});
it('returns false eventually, if no invocation returned a truthy value',
function() {
var extent = [1, 2, 3, 4];
var spy = sinon.spy(); // will return undefined for each corner
var got = ol.extent.forEachCorner(extent, spy);
expect(spy.callCount).to.be(4);
expect(got).to.be(false);
}
);
it('calls the callback with given scope', function() {
var extent = [1, 2, 3, 4];
var scope = {humpty: 'dumpty'};
ol.extent.forEachCorner(extent, callbackTrue, scope);
expect(callbackTrue.calledOn(scope)).to.be(true);
});
});
describe('getArea', function() {
it('returns zero for empty extents', function() {
var emptyExtent = ol.extent.createEmpty();
var areaEmpty = ol.extent.getArea(emptyExtent);
expect(areaEmpty).to.be(0);
var extentDeltaXZero = [45, 67, 45, 78];
var areaDeltaXZero = ol.extent.getArea(extentDeltaXZero);
expect(areaDeltaXZero).to.be(0);
var extentDeltaYZero = [11, 67, 45, 67];
var areaDeltaYZero = ol.extent.getArea(extentDeltaYZero);
expect(areaDeltaYZero).to.be(0);
});
it('calculates correct area for other extents', function() {
var extent = [0, 0, 10, 10];
var area = ol.extent.getArea(extent);
expect(area).to.be(100);
});
});
describe('getIntersection()', function() {
it('returns the intersection of two extents', function() {
var world = [-180, -90, 180, 90];
var north = [-180, 0, 180, 90];
var farNorth = [-180, 45, 180, 90];
var east = [0, -90, 180, 90];
var farEast = [90, -90, 180, 90];
var south = [-180, -90, 180, 0];
var farSouth = [-180, -90, 180, -45];
var west = [-180, -90, 0, 90];
var farWest = [-180, -90, -90, 90];
var none = ol.extent.createEmpty();
expect(ol.extent.getIntersection(world, none)).to.eql(none);
expect(ol.extent.getIntersection(world, north)).to.eql(north);
expect(ol.extent.getIntersection(world, east)).to.eql(east);
expect(ol.extent.getIntersection(world, south)).to.eql(south);
expect(ol.extent.getIntersection(world, west)).to.eql(west);
expect(ol.extent.getIntersection(farEast, farWest)).to.eql(none);
expect(ol.extent.getIntersection(farNorth, farSouth)).to.eql(none);
expect(ol.extent.getIntersection(north, west)).to.eql([-180, 0, 0, 90]);
expect(ol.extent.getIntersection(east, south)).to.eql([0, -90, 180, 0]);
});
});
describe('containsCoordinate', function() {
describe('positive', function() {
it('returns true', function() {
var extent = [1, 2, 3, 4];
expect(ol.extent.containsCoordinate(extent, [1, 2])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [1, 3])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [1, 4])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [2, 2])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [2, 3])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [2, 4])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [3, 2])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [3, 3])).to.be.ok();
expect(ol.extent.containsCoordinate(extent, [3, 4])).to.be.ok();
});
});
describe('negative', function() {
it('returns false', function() {
var extent = [1, 2, 3, 4];
expect(ol.extent.containsCoordinate(extent, [0, 1])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [0, 2])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [0, 3])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [0, 4])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [0, 5])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [1, 1])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [1, 5])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [2, 1])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [2, 5])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [3, 1])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [3, 5])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [4, 1])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [4, 2])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [4, 3])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [4, 4])).to.not.be();
expect(ol.extent.containsCoordinate(extent, [4, 5])).to.not.be();
});
});
});
describe('coordinateRelationship()', function() {
var extent = [-180, -90, 180, 90];
var INTERSECTING = 1;
var ABOVE = 2;
var RIGHT = 4;
var BELOW = 8;
var LEFT = 16;
it('returns intersecting for within', function() {
var rel = ol.extent.coordinateRelationship(extent, [0, 0]);
expect(rel).to.be(INTERSECTING);
});
it('returns intersecting for touching top', function() {
var rel = ol.extent.coordinateRelationship(extent, [0, 90]);
expect(rel).to.be(INTERSECTING);
});
it('returns intersecting for touching right', function() {
var rel = ol.extent.coordinateRelationship(extent, [180, 0]);
expect(rel).to.be(INTERSECTING);
});
it('returns intersecting for touching bottom', function() {
var rel = ol.extent.coordinateRelationship(extent, [0, -90]);
expect(rel).to.be(INTERSECTING);
});
it('returns intersecting for touching left', function() {
var rel = ol.extent.coordinateRelationship(extent, [-180, 0]);
expect(rel).to.be(INTERSECTING);
});
it('above for north', function() {
var rel = ol.extent.coordinateRelationship(extent, [0, 100]);
expect(rel).to.be(ABOVE);
});
it('above and right for northeast', function() {
var rel = ol.extent.coordinateRelationship(extent, [190, 100]);
expect(rel & ABOVE).to.be(ABOVE);
expect(rel & RIGHT).to.be(RIGHT);
});
it('right for east', function() {
var rel = ol.extent.coordinateRelationship(extent, [190, 0]);
expect(rel).to.be(RIGHT);
});
it('below and right for southeast', function() {
var rel = ol.extent.coordinateRelationship(extent, [190, -100]);
expect(rel & BELOW).to.be(BELOW);
expect(rel & RIGHT).to.be(RIGHT);
});
it('below for south', function() {
var rel = ol.extent.coordinateRelationship(extent, [0, -100]);
expect(rel).to.be(BELOW);
});
it('below and left for southwest', function() {
var rel = ol.extent.coordinateRelationship(extent, [-190, -100]);
expect(rel & BELOW).to.be(BELOW);
expect(rel & LEFT).to.be(LEFT);
});
it('left for west', function() {
var rel = ol.extent.coordinateRelationship(extent, [-190, 0]);
expect(rel).to.be(LEFT);
});
it('above and left for northwest', function() {
var rel = ol.extent.coordinateRelationship(extent, [-190, 100]);
expect(rel & ABOVE).to.be(ABOVE);
expect(rel & LEFT).to.be(LEFT);
});
});
describe('getCenter', function() {
it('returns the expected center', function() {
var extent = [1, 2, 3, 4];
var center = ol.extent.getCenter(extent);
expect(center[0]).to.eql(2);
expect(center[1]).to.eql(3);
});
it('returns [NaN, NaN] for empty extents', function() {
var extent = ol.extent.createEmpty();
var center = ol.extent.getCenter(extent);
expect('' + center[0]).to.be('NaN');
expect('' + center[1]).to.be('NaN');
});
});
describe('getCorner', function() {
var extent = [1, 2, 3, 4];
it('gets the bottom left', function() {
var corner = 'bottom-left';
expect(ol.extent.getCorner(extent, corner)).to.eql([1, 2]);
});
it('gets the bottom right', function() {
var corner = 'bottom-right';
expect(ol.extent.getCorner(extent, corner)).to.eql([3, 2]);
});
it('gets the top left', function() {
var corner = 'top-left';
expect(ol.extent.getCorner(extent, corner)).to.eql([1, 4]);
});
it('gets the top right', function() {
var corner = 'top-right';
expect(ol.extent.getCorner(extent, corner)).to.eql([3, 4]);
});
it('throws exception for unexpected corner', function() {
expect(function() {
ol.extent.getCorner(extent, 'foobar');
}).to.throwException();
});
});
describe('getEnlargedArea', function() {
it('returns enlarged area of two extents', function() {
var extent1 = [-1, -1, 0, 0];
var extent2 = [0, 0, 1, 1];
var enlargedArea = ol.extent.getEnlargedArea(extent1, extent2);
expect(enlargedArea).to.be(4);
});
});
describe('getForViewAndSize', function() {
it('works for a unit square', function() {
var extent = ol.extent.getForViewAndSize(
[0, 0], 1, 0, [1, 1]);
expect(extent[0]).to.be(-0.5);
expect(extent[2]).to.be(0.5);
expect(extent[1]).to.be(-0.5);
expect(extent[3]).to.be(0.5);
});
it('works for center', function() {
var extent = ol.extent.getForViewAndSize(
[5, 10], 1, 0, [1, 1]);
expect(extent[0]).to.be(4.5);
expect(extent[2]).to.be(5.5);
expect(extent[1]).to.be(9.5);
expect(extent[3]).to.be(10.5);
});
it('works for rotation', function() {
var extent = ol.extent.getForViewAndSize(
[0, 0], 1, Math.PI / 4, [1, 1]);
expect(extent[0]).to.roughlyEqual(-Math.sqrt(0.5), 1e-9);
expect(extent[2]).to.roughlyEqual(Math.sqrt(0.5), 1e-9);
expect(extent[1]).to.roughlyEqual(-Math.sqrt(0.5), 1e-9);
expect(extent[3]).to.roughlyEqual(Math.sqrt(0.5), 1e-9);
});
it('works for resolution', function() {
var extent = ol.extent.getForViewAndSize(
[0, 0], 2, 0, [1, 1]);
expect(extent[0]).to.be(-1);
expect(extent[2]).to.be(1);
expect(extent[1]).to.be(-1);
expect(extent[3]).to.be(1);
});
it('works for size', function() {
var extent = ol.extent.getForViewAndSize(
[0, 0], 1, 0, [10, 5]);
expect(extent[0]).to.be(-5);
expect(extent[2]).to.be(5);
expect(extent[1]).to.be(-2.5);
expect(extent[3]).to.be(2.5);
});
});
describe('getSize', function() {
it('returns the expected size', function() {
var extent = [0, 1, 2, 4];
var size = ol.extent.getSize(extent);
expect(size).to.eql([2, 3]);
});
});
describe('getIntersectionArea', function() {
it('returns correct area when extents intersect', function() {
var extent1 = [0, 0, 2, 2];
var extent2 = [1, 1, 3, 3];
var intersectionArea = ol.extent.getIntersectionArea(extent1, extent2);
expect(intersectionArea).to.be(1);
});
it('returns 0 when extents do not intersect', function() {
var extent1 = [0, 0, 1, 1];
var extent2 = [2, 2, 3, 3];
var intersectionArea = ol.extent.getIntersectionArea(extent1, extent2);
expect(intersectionArea).to.be(0);
});
});
describe('getMargin', function() {
it('returns the correct margin (sum of width and height)', function() {
var extent = [1, 2, 3, 4];
expect(ol.extent.getMargin(extent)).to.be(4);
});
});
describe('intersects', function() {
it('returns the expected value', function() {
var intersects = ol.extent.intersects;
var extent = [50, 50, 100, 100];
expect(intersects(extent, extent)).to.be(true);
expect(intersects(extent, [20, 20, 80, 80])).to.be(true);
expect(intersects(extent, [20, 50, 80, 100])).to.be(true);
expect(intersects(extent, [20, 80, 80, 120])).to.be(true);
expect(intersects(extent, [50, 20, 100, 80])).to.be(true);
expect(intersects(extent, [50, 80, 100, 120])).to.be(true);
expect(intersects(extent, [80, 20, 120, 80])).to.be(true);
expect(intersects(extent, [80, 50, 120, 100])).to.be(true);
expect(intersects(extent, [80, 80, 120, 120])).to.be(true);
expect(intersects(extent, [20, 20, 120, 120])).to.be(true);
expect(intersects(extent, [70, 70, 80, 80])).to.be(true);
expect(intersects(extent, [10, 10, 30, 30])).to.be(false);
expect(intersects(extent, [30, 10, 70, 30])).to.be(false);
expect(intersects(extent, [50, 10, 100, 30])).to.be(false);
expect(intersects(extent, [80, 10, 120, 30])).to.be(false);
expect(intersects(extent, [120, 10, 140, 30])).to.be(false);
expect(intersects(extent, [10, 30, 30, 70])).to.be(false);
expect(intersects(extent, [120, 30, 140, 70])).to.be(false);
expect(intersects(extent, [10, 50, 30, 100])).to.be(false);
expect(intersects(extent, [120, 50, 140, 100])).to.be(false);
expect(intersects(extent, [10, 80, 30, 120])).to.be(false);
expect(intersects(extent, [120, 80, 140, 120])).to.be(false);
expect(intersects(extent, [10, 120, 30, 140])).to.be(false);
expect(intersects(extent, [30, 120, 70, 140])).to.be(false);
expect(intersects(extent, [50, 120, 100, 140])).to.be(false);
expect(intersects(extent, [80, 120, 120, 140])).to.be(false);
expect(intersects(extent, [120, 120, 140, 140])).to.be(false);
});
});
describe('scaleFromCenter', function() {
it('scales the extent from its center', function() {
var extent = [1, 1, 3, 3];
ol.extent.scaleFromCenter(extent, 2);
expect(extent[0]).to.eql(0);
expect(extent[2]).to.eql(4);
expect(extent[1]).to.eql(0);
expect(extent[3]).to.eql(4);
});
});
describe('intersectsSegment()', function() {
var extent = [-180, -90, 180, 90];
var north = [0, 100];
var northeast = [190, 100];
var east = [190, 0];
var southeast = [190, -100];
var south = [0, -100];
var southwest = [-190, -100];
var west = [-190, 0];
var northwest = [-190, 100];
var center = [0, 0];
var top = [0, 90];
var right = [180, 0];
var bottom = [-90, 0];
var left = [-180, 0];
var inside = [10, 10];
it('returns true if contained', function() {
var intersects = ol.extent.intersectsSegment(extent, center, inside);
expect(intersects).to.be(true);
});
it('returns true if crosses top', function() {
var intersects = ol.extent.intersectsSegment(extent, center, north);
expect(intersects).to.be(true);
});
it('returns true if crosses right', function() {
var intersects = ol.extent.intersectsSegment(extent, center, east);
expect(intersects).to.be(true);
});
it('returns true if crosses bottom', function() {
var intersects = ol.extent.intersectsSegment(extent, center, south);
expect(intersects).to.be(true);
});
it('returns true if crosses left', function() {
var intersects = ol.extent.intersectsSegment(extent, center, west);
expect(intersects).to.be(true);
});
it('returns false if above', function() {
var intersects = ol.extent.intersectsSegment(extent, northwest, north);
expect(intersects).to.be(false);
});
it('returns false if right', function() {
var intersects = ol.extent.intersectsSegment(extent, northeast, east);
expect(intersects).to.be(false);
});
it('returns false if below', function() {
var intersects = ol.extent.intersectsSegment(extent, south, southwest);
expect(intersects).to.be(false);
});
it('returns false if left', function() {
var intersects = ol.extent.intersectsSegment(extent, west, southwest);
expect(intersects).to.be(false);
});
it('returns true if crosses top to bottom', function() {
var intersects = ol.extent.intersectsSegment(extent, north, south);
expect(intersects).to.be(true);
});
it('returns true if crosses bottom to top', function() {
var intersects = ol.extent.intersectsSegment(extent, south, north);
expect(intersects).to.be(true);
});
it('returns true if crosses left to right', function() {
var intersects = ol.extent.intersectsSegment(extent, west, east);
expect(intersects).to.be(true);
});
it('returns true if crosses right to left', function() {
var intersects = ol.extent.intersectsSegment(extent, east, west);
expect(intersects).to.be(true);
});
it('returns true if crosses northwest to east', function() {
var intersects = ol.extent.intersectsSegment(extent, northwest, east);
expect(intersects).to.be(true);
});
it('returns true if crosses south to west', function() {
var intersects = ol.extent.intersectsSegment(extent, south, west);
expect(intersects).to.be(true);
});
it('returns true if touches top', function() {
var intersects = ol.extent.intersectsSegment(extent, northwest, top);
expect(intersects).to.be(true);
});
it('returns true if touches right', function() {
var intersects = ol.extent.intersectsSegment(extent, southeast, right);
expect(intersects).to.be(true);
});
it('returns true if touches bottom', function() {
var intersects = ol.extent.intersectsSegment(extent, bottom, south);
expect(intersects).to.be(true);
});
it('returns true if touches left', function() {
var intersects = ol.extent.intersectsSegment(extent, left, west);
expect(intersects).to.be(true);
});
it('works for zero length inside', function() {
var intersects = ol.extent.intersectsSegment(extent, center, center);
expect(intersects).to.be(true);
});
it('works for zero length outside', function() {
var intersects = ol.extent.intersectsSegment(extent, north, north);
expect(intersects).to.be(false);
});
it('works for left/right intersection spanning top to bottom', function() {
var extent = [2, 1, 3, 4];
var start = [0, 0];
var end = [5, 5];
expect(ol.extent.intersectsSegment(extent, start, end)).to.be(true);
expect(ol.extent.intersectsSegment(extent, end, start)).to.be(true);
});
it('works for top/bottom intersection spanning left to right', function() {
var extent = [1, 2, 4, 3];
var start = [0, 0];
var end = [5, 5];
expect(ol.extent.intersectsSegment(extent, start, end)).to.be(true);
expect(ol.extent.intersectsSegment(extent, end, start)).to.be(true);
});
});
describe('#applyTransform()', function() {
it('does transform', function() {
var transformFn = ol.proj.getTransform('EPSG:4326', 'EPSG:3857');
var sourceExtent = [-15, -30, 45, 60];
var destinationExtent = ol.extent.applyTransform(
sourceExtent, transformFn);
expect(destinationExtent).not.to.be(undefined);
expect(destinationExtent).not.to.be(null);
// FIXME check values with third-party tool
expect(destinationExtent[0])
.to.roughlyEqual(-1669792.3618991037, 1e-9);
expect(destinationExtent[2]).to.roughlyEqual(5009377.085697311, 1e-9);
expect(destinationExtent[1]).to.roughlyEqual(-3503549.843504376, 1e-8);
expect(destinationExtent[3]).to.roughlyEqual(8399737.889818361, 1e-8);
});
it('takes arbitrary function', function() {
var transformFn = function(input, output, opt_dimension) {
var dimension = opt_dimension !== undefined ? opt_dimension : 2;
if (output === undefined) {
output = new Array(input.length);
}
var n = input.length;
var i;
for (i = 0; i < n; i += dimension) {
output[i] = -input[i];
output[i + 1] = -input[i + 1];
}
return output;
};
var sourceExtent = [-15, -30, 45, 60];
var destinationExtent = ol.extent.applyTransform(
sourceExtent, transformFn);
expect(destinationExtent).not.to.be(undefined);
expect(destinationExtent).not.to.be(null);
expect(destinationExtent[0]).to.be(-45);
expect(destinationExtent[2]).to.be(15);
expect(destinationExtent[1]).to.be(-60);
expect(destinationExtent[3]).to.be(30);
});
});
});