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Core.Features.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Features - Jest-GeoJSON</title>
<meta
name="description"
content="An extended set of matcher functions for the Jest Javascript unit testing framework tailored to evaluating GeoJSON data."
/>
<meta
name="keywords"
content="jest-geojson, jest, testing, validation, geojson, test, gis, assertions, matchers, jest-tests, jest-matchers, javascript, node, npm"
/>
<meta
name="keyword"
content="jest-geojson, jest, testing, validation, geojson, test, gis, assertions, matchers, jest-tests, jest-matchers, javascript, node, npm"
/>
<meta property="og:title" content="Jest-GeoJSON Documentation" />
<meta property="og:type" content="article" />
<meta
property="og:image"
content="https://github.com/M-Scott-Lassiter/jest-geojson/blob/main/images/banner.svg"
/>
<meta property="og:site_name" content="Jest-GeoJSON" />
<meta property="og:url" content="https://github.com/M-Scott-Lassiter/jest-geojson" />
<script src="scripts/prettify/prettify.js"></script>
<script src="scripts/prettify/lang-css.js"></script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify.css" />
<link type="text/css" rel="stylesheet" href="styles/jsdoc.css" />
<script src="scripts/nav.js" defer></script>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>
<body>
<input type="checkbox" id="nav-trigger" class="nav-trigger" />
<label for="nav-trigger" class="navicon-button x">
<div class="navicon"></div>
</label>
<label for="nav-trigger" class="overlay"></label>
<nav class="wrap">
<input type="text" id="nav-search" placeholder="Search" />
<h2><a href="index.html">Home</a></h2>
<h2>
<a
href="https://github.com/M-Scott-Lassiter/jest-geojson"
target="_blank"
class="menu-item"
id="repository"
>Github Repo</a
>
</h2>
<h3>Namespaces</h3>
<ul>
<li><a href="Core.html">Core</a></li>
<li>
<a href="Core.BoundingBoxes.html">Core.BoundingBoxes</a>
<ul class="methods">
<li data-type="method">
<a href="Core.BoundingBoxes.html#.valid2DBoundingBox"
>valid2DBoundingBox</a
>
</li>
<li data-type="method">
<a href="Core.BoundingBoxes.html#.valid3DBoundingBox"
>valid3DBoundingBox</a
>
</li>
<li data-type="method">
<a href="Core.BoundingBoxes.html#.validBoundingBox">validBoundingBox</a>
</li>
</ul>
</li>
<li>
<a href="Core.Coordinates.html">Core.Coordinates</a>
<ul class="methods">
<li data-type="method">
<a href="Core.Coordinates.html#.valid2DCoordinate">valid2DCoordinate</a>
</li>
<li data-type="method">
<a href="Core.Coordinates.html#.valid3DCoordinate">valid3DCoordinate</a>
</li>
<li data-type="method">
<a href="Core.Coordinates.html#.validCoordinate">validCoordinate</a>
</li>
</ul>
</li>
<li>
<a href="Core.FeatureCollections.html">Core.FeatureCollections</a>
<ul class="methods">
<li data-type="method">
<a href="Core.FeatureCollections.html#.featureCollection"
>featureCollection</a
>
</li>
</ul>
</li>
<li>
<a href="Core.Features.html">Core.Features</a>
<ul class="methods">
<li data-type="method">
<a href="Core.Features.html#.feature">feature</a>
</li>
<li data-type="method"><a href="Core.Features.html#.hasID">hasID</a></li>
</ul>
</li>
<li>
<a href="Core.Geometries.html">Core.Geometries</a>
<ul class="methods">
<li data-type="method">
<a href="Core.Geometries.html#.anyGeometry">anyGeometry</a>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.geometryCollection"
>geometryCollection</a
>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.lineStringGeometry"
>lineStringGeometry</a
>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.multiLineStringGeometry"
>multiLineStringGeometry</a
>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.multiPointGeometry"
>multiPointGeometry</a
>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.multiPolygonGeometry"
>multiPolygonGeometry</a
>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.pointGeometry">pointGeometry</a>
</li>
<li data-type="method">
<a href="Core.Geometries.html#.polygonGeometry">polygonGeometry</a>
</li>
</ul>
</li>
<li>
<a href="Core.Utilities.html">Core.Utilities</a>
<ul class="methods">
<li data-type="method">
<a href="Core.Utilities.html#.commonGeometryValidation"
>commonGeometryValidation</a
>
</li>
<li data-type="method">
<a href="Core.Utilities.html#.validGeoJSON">validGeoJSON</a>
</li>
</ul>
</li>
<li><a href="Matchers.html">Matchers</a></li>
<li>
<a href="Matchers.BoundingBoxes.html">Matchers.BoundingBoxes</a>
<ul class="methods">
<li data-type="method">
<a href="Matchers.BoundingBoxes.html#.isValid2DBoundingBox"
>isValid2DBoundingBox</a
>
</li>
<li data-type="method">
<a href="Matchers.BoundingBoxes.html#.isValid3DBoundingBox"
>isValid3DBoundingBox</a
>
</li>
<li data-type="method">
<a href="Matchers.BoundingBoxes.html#.isValidBoundingBox"
>isValidBoundingBox</a
>
</li>
</ul>
</li>
<li>
<a href="Matchers.Coordinates.html">Matchers.Coordinates</a>
<ul class="methods">
<li data-type="method">
<a href="Matchers.Coordinates.html#.isValid2DCoordinate"
>isValid2DCoordinate</a
>
</li>
<li data-type="method">
<a href="Matchers.Coordinates.html#.isValid3DCoordinate"
>isValid3DCoordinate</a
>
</li>
<li data-type="method">
<a href="Matchers.Coordinates.html#.isValidCoordinate"
>isValidCoordinate</a
>
</li>
</ul>
</li>
<li>
<a href="Matchers.FeatureCollections.html">Matchers.FeatureCollections</a>
<ul class="methods">
<li data-type="method">
<a href="Matchers.FeatureCollections.html#.toBeFeatureCollection"
>toBeFeatureCollection</a
>
</li>
</ul>
</li>
<li>
<a href="Matchers.Features.html">Matchers.Features</a>
<ul class="methods">
<li data-type="method">
<a href="Matchers.Features.html#.toBeFeature">toBeFeature</a>
</li>
<li data-type="method">
<a href="Matchers.Features.html#.toHaveID">toHaveID</a>
</li>
<li data-type="method">
<a href="Matchers.Features.html#.toHaveStringID">toHaveStringID</a>
</li>
</ul>
</li>
<li>
<a href="Matchers.Functional.html">Matchers.Functional</a>
<ul class="methods">
<li data-type="method">
<a href="Matchers.Functional.html#.toBeValidGeoJSON"
>toBeValidGeoJSON</a
>
</li>
</ul>
</li>
<li>
<a href="Matchers.Geometries.html">Matchers.Geometries</a>
<ul class="methods">
<li data-type="method">
<a href="Matchers.Geometries.html#.toBeAnyGeometry">toBeAnyGeometry</a>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBeGeometryCollection"
>toBeGeometryCollection</a
>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBeLineStringGeometry"
>toBeLineStringGeometry</a
>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBeMultiLineStringGeometry"
>toBeMultiLineStringGeometry</a
>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBeMultiPointGeometry"
>toBeMultiPointGeometry</a
>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBeMultiPolygonGeometry"
>toBeMultiPolygonGeometry</a
>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBePointGeometry"
>toBePointGeometry</a
>
</li>
<li data-type="method">
<a href="Matchers.Geometries.html#.toBePolygonGeometry"
>toBePolygonGeometry</a
>
</li>
</ul>
</li>
</ul>
</nav>
<div id="main">
<h1 class="page-title">Features</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="Core.html">Core</a>.</span>
Features
</h2>
</header>
<article>
<div class="container-overview">
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source">
<ul class="dummy">
<li>
<a href="typedefinitions.js.html">typedefinitions.js</a>,
<a href="typedefinitions.js.html#line99">line 99</a>
</li>
</ul>
</dd>
</dl>
<div class="description usertext">
Feature object validation functions used within Core.
</div>
</div>
<h3 class="subsection-title">Methods</h3>
<h4 class="name" id=".feature">
<span class="type-signature">(static) </span>feature<span class="signature"
>(featureObject, geometryType<span class="signature-attributes"
>opt</span
>)</span
><span class="type-signature"> → {boolean}</span>
</h4>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source">
<ul class="dummy">
<li>
<a href="core_features_feature.js.html"
>core/features/feature.js</a
>, <a href="core_features_feature.js.html#line66">line 66</a>
</li>
</ul>
</dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li>
<a
href="https://github.com/M-Scott-Lassiter/jest-geojson/issues/24"
>https://github.com/M-Scott-Lassiter/jest-geojson/issues/24</a
>
</li>
</ul>
</dd>
</dl>
<div class="description usertext">
Verifies an object is a valid GeoJSON Feature. This object requires a "type"
member that must equal 'Feature', a "geometry" member that contains either
one of the seven valid GeoJSON geometry objects or an empty array, and a
"properties" member that is either an object of any composition or null.
Foreign members are allowed with the exceptions thrown below. If present,
bounding boxes must be valid.
</div>
<h5>Example</h5>
<pre class="prettyprint"><code>const testFeature = {
"type": "Feature",
"bbox": [-10.0, -10.0, 10.0, 10.0],
"geometry": {
"type": "Polygon",
"coordinates": [
[
[-10.0, -10.0],
[10.0, -10.0],
[10.0, 10.0],
[-10.0, -10.0]
]
]
},
"properties": {
"prop0": "value0",
"prop1": {
"this": "that"
}
}
}
const multiPoint = {
type: "MultiPoint",
coordinates: [
[101.0, 0.0],
[102.0, 1.0]
]
}
const goodExample1 = feature(testFeature)) // true
const goodExample2 = feature(testFeature, 'Polygon')) // true
const badExample1 = feature(multiPoint)) // throws error
const badExample2 = feature(testFeature, 'LineString')) // throws error
const badExample3 = feature(testFeature.geometry, 'Polygon')) // throws error</code></pre>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>featureObject</code></td>
<td class="type">
<span class="param-type">object</span>
</td>
<td class="attributes"></td>
<td class="description last">
a GeoJSON LineString Geometry object
</td>
</tr>
<tr>
<td class="name"><code>geometryType</code></td>
<td class="type">
<span class="param-type">string</span>
</td>
<td class="attributes"><optional><br /></td>
<td class="description last">
Specific type of geometry to search for
</td>
</tr>
</tbody>
</table>
<h5>Throws:</h5>
<ul>
<li>
<dl>
<dt>
<div class="param-desc usertext">Argument not an object</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
<li>
<dl>
<dt>
<div class="param-desc usertext">
Must have a type property with value 'Feature'
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
<li>
<dl>
<dt>
<div class="param-desc usertext">
Forbidden from having a property 'coordinates',
'geometries', 'properties', or 'features'
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
<li>
<dl>
<dt>
<div class="param-desc usertext">
Bounding box must be valid (if present)
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
<li>
<dl>
<dt>
<div class="param-desc usertext">
ID must be either a number or string (if present)
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
</ul>
<h5>Returns:</h5>
<div class="param-desc">
True if a valid GeoJSON Feature. If invalid, it will throw an error.
</div>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">boolean</span>
</dd>
</dl>
<h4 class="name" id=".hasID">
<span class="type-signature">(static) </span>hasID<span class="signature"
>(featureObject, SearchID<span class="signature-attributes">opt</span
>)</span
><span class="type-signature"> → {boolean}</span>
</h4>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source">
<ul class="dummy">
<li>
<a href="core_features_hasID.js.html">core/features/hasID.js</a
>, <a href="core_features_hasID.js.html#line43">line 43</a>
</li>
</ul>
</dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li>
<a
href="https://github.com/M-Scott-Lassiter/jest-geojson/issues/36"
>https://github.com/M-Scott-Lassiter/jest-geojson/issues/36</a
>
</li>
</ul>
</dd>
</dl>
<div class="description usertext">
Checks if a GeoJSON Feature has an ID. Providing an optional SearchID
argument will check for that exact ID or array of possible ID values.
</div>
<h5>Examples</h5>
<pre class="prettyprint"><code>const testFeature = {
type: 'Feature',
id: 'f1',
geometry: {...},
properties: {...}
}
// All of these return true
const goodExample1 = hasID(testFeature)
const goodExample2 = hasID(testFeature, 'f1')
const goodExample3 = hasID(testFeature, [1, 'F', 'F12', /[a-z]+[0-9]+/])
// Both of these return false
const badExample1 = hasID(testFeature, 'f12')
const badExample2 = hasID(testFeature, [1, 'F', 'F12', /SomeID/])</code></pre>
<pre class="prettyprint"><code>const testFeature = {
type: 'Feature',
geometry: {...},
properties: {...}
}
const example = hasID(testFeature) // false</code></pre>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>featureObject</code></td>
<td class="type">
<span class="param-type">object</span>
</td>
<td class="attributes"></td>
<td class="description last">a GeoJSON Feature object</td>
</tr>
<tr>
<td class="name"><code>SearchID</code></td>
<td class="type">
<span class="param-type">string</span>
|
<span class="param-type">number</span>
|
<span class="param-type">RegExp</span>
|
<span class="param-type">Array.<string></span>
|
<span class="param-type">Array.<number></span>
|
<span class="param-type">Array.<RegExp></span>
</td>
<td class="attributes"><optional><br /></td>
<td class="description last">
Specific value or array of possible values to search for.
</td>
</tr>
</tbody>
</table>
<h5>Throws:</h5>
<ul>
<li>
<dl>
<dt>
<div class="param-desc usertext">
Argument must be a GeoJSON Feature object
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
<li>
<dl>
<dt>
<div class="param-desc usertext">
Feature object must have an "id" member
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
<li>
<dl>
<dt>
<div class="param-desc usertext">
Optional SearchID must be either a number, string, RegExp,
or array of any of these values
</div>
</dt>
<dd></dd>
<dt>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">Error</span>
</dd>
</dl>
</dt>
<dd></dd>
</dl>
</li>
</ul>
<h5>Returns:</h5>
<div class="param-desc">
True if the Feature object has any ID (no argument provided), or if the ID
exactly matches the optional argument (single string, number, or RegExp
provided), or any value within an array of any combination of strings,
numbers, or RegExp. If the object has an ID that does not match SearchID, it
returns false.
</div>
<dl class="param-type">
<dt>Type</dt>
<dd>
<span class="param-type">boolean</span>
</dd>
</dl>
</article>
</section>
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