mirror of
https://github.com/FoggedLens/iD.git
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238 lines
9.6 KiB
JavaScript
238 lines
9.6 KiB
JavaScript
describe("iD.geo.Extent", function () {
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describe("constructor", function () {
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it("defaults to infinitely empty extent", function () {
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expect(iD.geo.Extent().equals([[Infinity, Infinity], [-Infinity, -Infinity]])).to.be.ok;
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});
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it("constructs via a point", function () {
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var p = [0, 0];
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expect(iD.geo.Extent(p).equals([p, p])).to.be.ok;
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});
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it("constructs via two points", function () {
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var min = [0, 0],
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max = [5, 10];
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expect(iD.geo.Extent(min, max).equals([min, max])).to.be.ok;
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});
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it("constructs via an extent", function () {
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var min = [0, 0],
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max = [5, 10];
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expect(iD.geo.Extent([min, max]).equals([min, max])).to.be.ok;
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});
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it("constructs via an iD.geo.Extent", function () {
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var min = [0, 0],
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max = [5, 10],
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extent = iD.geo.Extent(min, max);
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expect(iD.geo.Extent(extent).equals(extent)).to.be.ok;
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});
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it("has length 2", function () {
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expect(iD.geo.Extent().length).to.equal(2);
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});
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it("has min element", function () {
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var min = [0, 0],
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max = [5, 10];
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expect(iD.geo.Extent(min, max)[0]).to.equal(min);
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});
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it("has max element", function () {
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var min = [0, 0],
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max = [5, 10];
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expect(iD.geo.Extent(min, max)[1]).to.equal(max);
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});
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});
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describe("#equals", function () {
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it("tests extent equality", function () {
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var e1 = iD.geo.Extent([0, 0], [10, 10]),
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e2 = iD.geo.Extent([0, 0], [10, 10]),
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e3 = iD.geo.Extent([0, 0], [12, 12]);
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expect(e1.equals(e2)).to.be.ok;
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expect(e1.equals(e3)).to.be.not.ok;
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});
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});
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describe("#center", function () {
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it("returns the center point", function () {
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expect(iD.geo.Extent([0, 0], [5, 10]).center()).to.eql([2.5, 5]);
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});
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});
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describe("#area", function () {
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it("returns the area", function () {
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expect(iD.geo.Extent([0, 0], [5, 10]).area()).to.eql(50);
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});
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});
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describe("#padByMeters", function () {
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it("does not change centerpoint of an extent", function () {
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var min = [0, 0], max = [5, 10];
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expect(iD.geo.Extent(min, max).padByMeters(100).center()).to.eql([2.5, 5]);
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});
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it("does not affect the extent with a pad of zero", function () {
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var min = [0, 0], max = [5, 10];
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expect(iD.geo.Extent(min, max).padByMeters(0)[0]).to.eql([0, 0]);
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});
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});
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describe("#extend", function () {
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it("does not modify self", function () {
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var extent = iD.geo.Extent([0, 0], [0, 0]);
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extent.extend([1, 1]);
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expect(extent.equals([[0, 0], [0, 0]])).to.be.ok;
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});
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it("returns the minimal extent containing self and the given point", function () {
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expect(iD.geo.Extent().extend([0, 0]).equals([[0, 0], [0, 0]])).to.be.ok;
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expect(iD.geo.Extent([0, 0], [0, 0]).extend([5, 10]).equals([[0, 0], [5, 10]])).to.be.ok;
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});
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it("returns the minimal extent containing self and the given extent", function () {
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expect(iD.geo.Extent().extend([[0, 0], [5, 10]]).equals([[0, 0], [5, 10]])).to.be.ok;
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expect(iD.geo.Extent([0, 0], [0, 0]).extend([[4, -1], [5, 10]]).equals([[0, -1], [5, 10]])).to.be.ok;
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});
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});
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describe("#_extend", function () {
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it("extends self to the minimal extent containing self and the given extent", function () {
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var e = iD.geo.Extent();
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e._extend([[0, 0], [5, 10]]);
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expect(e.equals([[0, 0], [5, 10]])).to.be.ok;
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e = iD.geo.Extent([0, 0], [0, 0]);
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e._extend([[4, -1], [5, 10]]);
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expect(e.equals([[0, -1], [5, 10]])).to.be.ok;
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});
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});
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describe('#contains', function () {
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it("returns true for a point inside self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).contains([2, 2])).to.be.true;
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});
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it("returns true for a point on the boundary of self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).contains([0, 0])).to.be.true;
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});
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it("returns false for a point outside self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).contains([6, 6])).to.be.false;
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});
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it("returns true for an extent contained by self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).contains([[1, 1], [2, 2]])).to.be.true;
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expect(iD.geo.Extent([1, 1], [2, 2]).contains([[0, 0], [5, 5]])).to.be.false;
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});
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it("returns false for an extent partially contained by self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).contains([[1, 1], [6, 6]])).to.be.false;
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expect(iD.geo.Extent([1, 1], [6, 6]).contains([[0, 0], [5, 5]])).to.be.false;
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});
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it("returns false for an extent not intersected by self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).contains([[6, 6], [7, 7]])).to.be.false;
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expect(iD.geo.Extent([[6, 6], [7, 7]]).contains([[0, 0], [5, 5]])).to.be.false;
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});
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});
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describe('#intersects', function () {
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it("returns true for a point inside self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).intersects([2, 2])).to.be.true;
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});
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it("returns true for a point on the boundary of self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).intersects([0, 0])).to.be.true;
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});
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it("returns false for a point outside self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).intersects([6, 6])).to.be.false;
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});
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it("returns true for an extent contained by self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).intersects([[1, 1], [2, 2]])).to.be.true;
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expect(iD.geo.Extent([1, 1], [2, 2]).intersects([[0, 0], [5, 5]])).to.be.true;
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});
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it("returns true for an extent partially contained by self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).intersects([[1, 1], [6, 6]])).to.be.true;
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expect(iD.geo.Extent([1, 1], [6, 6]).intersects([[0, 0], [5, 5]])).to.be.true;
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});
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it("returns false for an extent not intersected by self", function () {
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expect(iD.geo.Extent([0, 0], [5, 5]).intersects([[6, 6], [7, 7]])).to.be.false;
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expect(iD.geo.Extent([[6, 6], [7, 7]]).intersects([[0, 0], [5, 5]])).to.be.false;
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});
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});
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describe("#intersection", function () {
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it("returns an empty extent if self does not intersect with other", function () {
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var a = iD.geo.Extent([0, 0], [5, 5]),
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b = iD.geo.Extent([6, 6], [7, 7]);
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expect(a.intersection(b)).to.eql(iD.geo.Extent());
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});
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it("returns the intersection of self with other (1)", function () {
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var a = iD.geo.Extent([0, 0], [5, 5]),
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b = iD.geo.Extent([3, 4], [7, 7]);
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expect(a.intersection(b)).to.eql(iD.geo.Extent([3, 4], [5, 5]));
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expect(b.intersection(a)).to.eql(iD.geo.Extent([3, 4], [5, 5]));
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});
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it("returns the intersection of self with other (2)", function () {
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var a = iD.geo.Extent([0, 0], [5, 5]),
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b = iD.geo.Extent([3, -4], [7, 2]);
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expect(a.intersection(b)).to.eql(iD.geo.Extent([3, 0], [5, 2]));
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expect(b.intersection(a)).to.eql(iD.geo.Extent([3, 0], [5, 2]));
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});
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it("returns the intersection of self with other (3)", function () {
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var a = iD.geo.Extent([0, 0], [5, 5]),
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b = iD.geo.Extent([3, 3], [4, 7]);
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expect(a.intersection(b)).to.eql(iD.geo.Extent([3, 3], [4, 5]));
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expect(b.intersection(a)).to.eql(iD.geo.Extent([3, 3], [4, 5]));
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});
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it("returns the intersection of self with other (4)", function () {
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var a = iD.geo.Extent([0, 0], [5, 5]),
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b = iD.geo.Extent([3, -2], [4, 2]);
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expect(a.intersection(b)).to.eql(iD.geo.Extent([3, 0], [4, 2]));
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expect(b.intersection(a)).to.eql(iD.geo.Extent([3, 0], [4, 2]));
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});
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it("returns the intersection of self with other (5)", function () {
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var a = iD.geo.Extent([0, 0], [5, 5]),
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b = iD.geo.Extent([1, 1], [2, 2]);
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expect(a.intersection(b)).to.eql(iD.geo.Extent([1, 1], [2, 2]));
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expect(b.intersection(a)).to.eql(iD.geo.Extent([1, 1], [2, 2]));
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});
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});
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describe("#percentContainedIn", function () {
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it("returns a 0 if self does not intersect other", function () {
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var a = iD.geo.Extent([0, 0], [1, 1]),
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b = iD.geo.Extent([0, 3], [4, 1]);
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expect(a.percentContainedIn(b)).to.eql(0);
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expect(b.percentContainedIn(a)).to.eql(0);
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});
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it("returns the percent contained of self with other (1)", function () {
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var a = iD.geo.Extent([0, 0], [2, 1]),
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b = iD.geo.Extent([1, 0], [3, 1]);
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expect(a.percentContainedIn(b)).to.eql(0.5);
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expect(b.percentContainedIn(a)).to.eql(0.5);
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});
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it("returns the percent contained of self with other (2)", function () {
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var a = iD.geo.Extent([0, 0], [4, 1]),
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b = iD.geo.Extent([3, 0], [4, 2]);
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expect(a.percentContainedIn(b)).to.eql(0.25);
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expect(b.percentContainedIn(a)).to.eql(0.5);
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});
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});
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});
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