expect-maptalks


A plugin of expect.js(https://github.com/Automattic/expect.js) for maptalks with assertions for Coordinate/GeoJSON/Layer

Usage

``bash
npm install expect-maptalks --save-dev
`

$3

Install karma-expect-maptalks
`bash
npm install karma-expect-maptalks --save-dev
`
In karma.conf.js, Attention: always declare expect-maptalks behind expect
`javascript
frameworks: [
'mocha',
'expect',
'expect-maptalks'
],

plugins: [
'karma-expect',
'karma-expect-maptalks'
],
`

Methods

approx: asserts that the value is approximately equal or not

`js
expect(1.000001).to.be.approx(1);
expect(1.001).to.be.approx(1, 1E-2);
`

closeTo: asserts that whether the coordinate is closeTo another (approx with a delta of 1E-6)

`js
expect([1, 1]).to.be.closeTo([1 + 1E-7, 1 - 1E-7]);
expect({x : 1, y : 1}).to.be.closeTo([1 + 1E-7, 1 - 1E-7]);
`

eqlGeoJSON: asserts that whether a GeoJSON object is equal with another (true if the coordinates are closeTo another's)

`js
//true
expect({ "type": "Point", "coordinates": [0.0, 0.0] })
.to.be.eqlGeoJSON({ "type": "Point", "coordinates": [0.000001, 0.000001] });
`

painted: asserts the given layer or map is painted in the center with a offset.

`js
var v = new maptalks.VectorLayer('v').addGeometries(geos).addTo(map);
//asserts layer is painted in the center
expect(v).to.be.painted();
//whether the layer is painted with an offset {x:5, y:3} from the center.
//a negative x to the left and a positive to the right.
//a negative y to the top and a positive to the bottom.
expect(v).to.be.painted(5, 3);
//assert the point's color is [255, 255, 255]
expect(v).to.be.painted(5, 3, [255, 255, 255]);
//also support map
expect(map).to.be.painted(5, 3, [255, 255, 255]);
``