Add volume units

app/static/app/js/classes/Units.js

@@ -80,6 +80,21 @@ const units = {
         factor: Math.pow((3937 / 1200) / 5280, 2),
         abbr: 'mi² (US)',
         round: 5
+    },
+    cbmeters:{
+        factor: 1,
+        abbr: 'm³',
+        round: 4
+    },
+    cbyards:{
+        factor: Math.pow(1/(0.3048*3), 3),
+        abbr: 'yd³',
+        round: 4
+    },
+    cbyards_us:{
+        factor: Math.pow(3937/3600, 3),
+        abbr: 'yd³ (US)',
+        round: 4
     }
 };
 
@@ -105,6 +120,8 @@ class ValueUnit{
 class UnitSystem{
     lengthUnit(meters){ throw new Error("Not implemented"); }
     areaUnit(sqmeters){ throw new Error("Not implemented"); }
+    volumeUnit(cbmeters){ throw new Error("Not implemented"); }
+    
     getName(){ throw new Error("Not implemented"); }
     
     area(sqmeters){
@@ -118,6 +135,12 @@ class UnitSystem{
         const val = unit.factor * meters;
         return new ValueUnit(val, unit);
     }
+
+    volume(cbmeters){
+        const unit = this.volumeUnit(cbmeters);
+        const val = unit.factor * cbmeters;
+        return new ValueUnit(val, unit);
+    }
 };
 
 class MetricSystem extends UnitSystem{
@@ -136,6 +159,10 @@ class MetricSystem extends UnitSystem{
         else if (sqmeters >= 1000000) return units.sqkilometers;
         return units.sqmeters;
     }
+
+    volumeUnit(cbmeters){
+        return units.cbmeters;
+    }
 }
 
 class ImperialSystem extends UnitSystem{
@@ -162,6 +189,10 @@ class ImperialSystem extends UnitSystem{
     acres(){
         return units.acres;
     }
+
+    cbyards(){
+        return units.cbyards;
+    }
     
     lengthUnit(meters){
         const feet = this.feet().factor * meters;
@@ -175,6 +206,10 @@ class ImperialSystem extends UnitSystem{
         else if (sqfeet >= 27878400) return this.sqmiles();
         else return this.sqfeet();
     }
+
+    volumeUnit(cbmeters){
+        return this.cbyards();
+    }
 }
 
 class ImperialUSSystem extends ImperialSystem{
@@ -201,6 +236,10 @@ class ImperialUSSystem extends ImperialSystem{
     acres(){
         return units.acres_us;
     }
+
+    cbyards(){
+        return units.cbyards_us;
+    }
 }
 
 const systems = {

app/static/app/js/components/tests/Units.test.jsx

@@ -38,6 +38,16 @@ describe('Metric system', () => {
     areas.forEach(a => {
         expect(metric.area(a[0]).toString()).toBe(a[1]);
     });
+
+    const volumes = [
+      [1, "1 m³"],
+      [9000, "9,000 m³"],
+      [9000.25559, "9,000.2556 m³"],
+    ];
+
+    volumes.forEach(v => {
+      expect(metric.volume(v[0]).toString()).toBe(v[1]);
+    });
   })
 });
 
@@ -74,5 +84,15 @@ describe('Imperial systems', () => {
       expect(imperial.area(a[0]).toString()).toBe(a[1]);
       expect(imperialUS.area(a[0]).toString()).toBe(a[2]);
     });
+
+    const volumes = [
+      [1, "1.308 yd³", "1.3079 yd³ (US)"],
+      [1000, "1,307.9506 yd³", "1,307.9428 yd³ (US)"]
+    ];
+
+    volumes.forEach(v => {
+      expect(imperial.volume(v[0]).toString()).toBe(v[1]);
+      expect(imperialUS.volume(v[0]).toString()).toBe(v[2]);
+    });
   })
 });