toHaveMinGeometryCount

[M-Scott-Lassiter]

Description

A GeoJSON GeometryCollection contains a "geometries" member with an array of GeoJSON geometry objects.

This matcher uses the toBeGeometryCollection functionality to verify the input is a properly formatted GeometryCollection object, and then determine if it has more than or equal to the MinCount value. It will throw an error for any of the other geometry types as it is a trivial comparison on those.

Omitting MinCount will assume a minimum value of 1. Passing a number less than 0 will throw an error. Decimals will get truncated.

Example Matcher Usage

const testCollection = {
    "type": "GeometryCollection",
    "geometries": [{
        "type": "Point",
        "coordinates": [100.0, 0.0]
    }, {
        "type": "LineString",
        "coordinates": [
            [101.0, 0.0],
            [102.0, 1.0]
        ]
    }, {
        "type": "Polygon",
        "coordinates": [
            [
                [102.0, 2.0],
                [103.0, 2.0],
                [103.0, 3.0],
                [102.0, 3.0],
                [102.0, 2.0]
            ]
        ]
    }, {
        "type": "Point",
        "coordinates": [150.0, 73.0]
    }]
}
const emptyCollection = {
    "type": "GeometryCollection",
    "geometries": []
}
const polygon = {
    type: 'Polygon',
    coordinates: [
        [
            [100.0, 0.0],
            [101.0, 0.0],
            [101.0, 1.0],
            [100.0, 1.0],
            [100.0, 0.0]
        ]
    ]
}

expect(testCollection).toHaveMinGeometryCount()
expect(testCollection).toHaveMinGeometryCount(4)

expect(testCollection).not.toHaveMinGeometryCount(5)
expect(emptyCollection).not.toHaveMinGeometryCount()
expect(polygon).not.toHaveMinGeometryCount(1)

Passing Tests

Good GeometryCollection

• Known good GeometryCollection with a single geometry
  • .toHaveMinGeometryCount()
  • .toHaveMinGeometryCount(0.9)
  • .toHaveMinGeometryCount(1)
  • .toHaveMinGeometryCount(1.2)
• Known good GeometryCollection with 4 geometries
  • .toHaveMinGeometryCount()
  • .toHaveMinGeometryCount(3)
  • .toHaveMinGeometryCount(4)
  • .toHaveMinGeometryCount(4.999)
• Stress test: Known good GeometryCollection with 100 geometries
  • .toHaveMinGeometryCount()
  • .toHaveMinGeometryCount(1)
  • .toHaveMinGeometryCount(50)
  • .toHaveMinGeometryCount(100)
• Empty Geometry
  • .toHaveMinGeometryCount(0)
  • .toHaveMinGeometryCount(0.1)
  • .toHaveMinGeometryCount(0.9)

Failing Tests

Invalid Inputs To Matcher

Rejects each of the following:

• Each of the seven Geometry objects except GeometryCollection
• An invalid GeometryCollection
• Feature and FeatureCollection object
• undefined, null, false, true, 0, NaN
• { someProp: 'I am not GeoJSON', id: 4 }
• {}
• '',
• 'Random Feature',

•   JSON.stringify({
        "type": "GeometryCollection",
        "geometries": [{
            "type": "Point",
            "coordinates": [100.0, 0.0]
        }, {
            "type": "LineString",
            "coordinates": [
                [101.0, 0.0],
                [102.0, 1.0]
            ]
        }, {
            "type": "Polygon",
            "coordinates": [
                [
                    [102.0, 2.0],
                    [103.0, 2.0],
                    [103.0, 3.0],
                    [102.0, 3.0],
                    [102.0, 2.0]
                ]
            ]
        }, {
            "type": "Point",
            "coordinates": [150.0, 73.0]
        }]
    })

Valid GeometryCollection With Bad MinCount

• Good GeometryCollection with MinCount as each of the values in "Invalid Inputs To Matcher" except 0

Valid GeometryCollection With Out of Range MinCount

• Known good GeometryCollection with a single geometry
  • .not.toHaveMinGeometryCount(-1)
  • .not.toHaveMinGeometryCount(2)
• Known good GeometryCollection with 4 geometries
  • .not.toHaveMinGeometryCount(-10)
  • .not.toHaveMinGeometryCount(-0.001)
  • .not.toHaveMinGeometryCount(5)
• Stress test: Known good GeometryCollection with 100 geometries
  • .not.toHaveMinGeometryCount(-Infinity)
  • .not.toHaveMinGeometryCount(101)
• Empty Geometry
  • .not.toHaveMinGeometryCount(-1)
  • .not.toHaveMinGeometryCount(1)
  • .not.toHaveMinGeometryCount()

[M-Scott-Lassiter]

🎉 This issue has been resolved in version 1.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀