01332ebead
The rationale is this: the spec string describes the expected behavior unconditionally. The code examples, on the other hand, set up an expectation that is tested with the call to the expect method. The code examples can violate the expectation, but the spec string does not. The value of the spec string is as clearly as possible describing the behavior. Including “should” in that description adds no value. (From http://rubyspec.org/style_guide/)
119 lines
3.2 KiB
JavaScript
119 lines
3.2 KiB
JavaScript
describe('LatLng', function() {
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describe('constructor', function() {
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it("sets lat and lng", function() {
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var a = new L.LatLng(25, 74);
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expect(a.lat).toEqual(25);
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expect(a.lng).toEqual(74);
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var b = new L.LatLng(-25, -74);
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expect(b.lat).toEqual(-25);
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expect(b.lng).toEqual(-74);
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});
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it('throws an error if invalid lat or lng', function () {
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expect(function () {
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var a = new L.LatLng(NaN, NaN);
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}).toThrow();
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});
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});
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describe('#equals', function() {
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it("returns true if compared objects are equal within a certain margin", function() {
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var a = new L.LatLng(10, 20);
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var b = new L.LatLng(10 + 1.0E-10, 20 - 1.0E-10);
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expect(a.equals(b)).toBe(true);
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});
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it("returns false if compared objects are not equal within a certain margin", function() {
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var a = new L.LatLng(10, 20);
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var b = new L.LatLng(10, 23.3);
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expect(a.equals(b)).toBe(false);
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});
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it('returns false if passed non-valid object', function () {
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var a = new L.LatLng(10, 20);
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expect(a.equals(null)).toBe(false);
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});
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});
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describe('#wrap', function () {
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it("wraps longitude to lie between -180 and 180 by default", function() {
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var a = new L.LatLng(0, 190).wrap().lng;
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expect(a).toEqual(-170);
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var b = new L.LatLng(0, 360).wrap().lng;
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expect(b).toEqual(0);
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var c = new L.LatLng(0, 380).wrap().lng;
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expect(c).toEqual(20);
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var d = new L.LatLng(0, -190).wrap().lng;
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expect(d).toEqual(170);
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var e = new L.LatLng(0, -360).wrap().lng;
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expect(e).toEqual(0);
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var f = new L.LatLng(0, -380).wrap().lng;
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expect(f).toEqual(-20);
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var g = new L.LatLng(0, 90).wrap().lng;
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expect(g).toEqual(90);
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var h = new L.LatLng(0, 180).wrap().lng;
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expect(h).toEqual(180);
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});
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it("wraps longitude within the given range", function() {
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var a = new L.LatLng(0, 190).wrap(-100, 100).lng;
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expect(a).toEqual(-10);
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});
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});
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describe('#toString', function () {
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it('formats a string', function () {
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var a = new L.LatLng(10.333333333, 20.2222222);
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expect(a.toString(3)).toEqual('LatLng(10.333, 20.222)');
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});
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});
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describe('#distanceTo', function () {
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it('calculates distance in meters', function () {
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var a = new L.LatLng(50.5, 30.5);
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var b = new L.LatLng(50, 1);
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expect(Math.abs(Math.round(a.distanceTo(b) / 1000) - 2084) < 5).toBe(true);
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});
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});
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describe('L.latLng factory', function () {
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it('returns LatLng instance as is', function () {
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var a = new L.LatLng(50, 30);
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expect(L.latLng(a)).toBe(a);
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});
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it('accepts an array of coordinates', function () {
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expect(L.latLng([50, 30])).toEqual(new L.LatLng(50, 30));
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});
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it('passes null or undefined as is', function () {
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expect(L.latLng(undefined)).toBe(undefined);
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expect(L.latLng(null)).toBe(null);
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});
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it('creates a LatLng object from two coordinates', function () {
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expect(L.latLng(50, 30)).toEqual(new L.LatLng(50, 30));
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});
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it('accepts an object with lat/lng', function () {
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expect(L.latLng({lat: 50, lng: 30})).toEqual(new L.LatLng(50, 30));
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});
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it('accepts an object with lat/lon', function () {
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expect(L.latLng({lat: 50, lon: 30})).toEqual(new L.LatLng(50, 30));
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});
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});
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});
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