Add gridref helper tests

Author: davidjamesstone

src/server/plugins/engine/components/helpers/geospatial.test.js

@@ -9,6 +9,7 @@ describe('Geospatial validation helpers', () => {
     expect(result.value).toBeDefined()
     expect(result.value).toHaveLength(4)
   })
+
   test('it should not have errors for valid geojson string', () => {
     const result = geospatialSchema.validate(JSON.stringify(validState))
 

src/server/plugins/engine/components/helpers/gridref.test.js

@@ -0,0 +1,61 @@
+import { getGridRef } from '~/src/server/plugins/engine/components/helpers/gridref.js'
+
+describe('Gridref helpers', () => {
+  test('it should return gridref for a point feature', () => {
+    const result = getGridRef({
+      id: 'id',
+      type: 'Feature',
+      geometry: {
+        type: 'Point',
+        coordinates: [-0.1356213, 51.5121161]
+      },
+      properties: {
+        description: 'New point'
+      }
+    })
+
+    expect(result).toBe('TQ 29472 80890')
+  })
+
+  test('it should return gridref for a linestring feature', () => {
+    const result = getGridRef({
+      id: 'id',
+      type: 'Feature',
+      geometry: {
+        type: 'LineString',
+        coordinates: [
+          [-0.1356213, 51.5121161],
+          [-0.0578579, 51.5182996]
+        ]
+      },
+      properties: {
+        description: 'New line'
+      }
+    })
+
+    expect(result).toBe('TQ 29472 80890 to TQ 34850 81718')
+  })
+
+  test('it should return gridref for a polygon feature', () => {
+    const result = getGridRef({
+      id: 'id',
+      type: 'Feature',
+      geometry: {
+        type: 'Polygon',
+        coordinates: [
+          [
+            [-0.1356213, 51.5121161],
+            [-0.0578579, 51.5182996],
+            [-0.1114282, 51.5602178],
+            [-0.1356213, 51.5121161]
+          ]
+        ]
+      },
+      properties: {
+        description: 'New polygon'
+      }
+    })
+
+    expect(result).toBe('TQ 31778 82963')
+  })
+})

src/server/plugins/engine/components/helpers/gridref.ts

@@ -10,7 +10,7 @@ export function getGridRef(feature: Feature) {
     const [long, lat] = feature.geometry.coordinates
     const point = new LatLon(lat, long)
 
-    return point.toOsGrid()
+    return point.toOsGrid().toString()
   }
 
   if (feature.geometry.type === 'LineString') {
@@ -21,13 +21,13 @@ export function getGridRef(feature: Feature) {
     const [long2, lat2] = feature.geometry.coordinates[numLinePoints - 1]
     const point2 = new LatLon(lat2, long2)
 
-    return `${point1.toOsGrid()} to ${point2.toOsGrid()}`
+    return `${point1.toOsGrid().toString()} to ${point2.toOsGrid().toString()}`
   }
 
   const shape = polygon(feature.geometry.coordinates)
   const centre = centroid(shape)
   const [long, lat] = centre.geometry.coordinates
   const point = new LatLon(lat, long)
 
-  return point.toOsGrid()
+  return point.toOsGrid().toString()
 }