feat: new equal command

application/source/data/transformer.mjs

@@ -576,6 +576,44 @@ function transform(value) {
 
             return map.get(value);
 
+        case "equals":
+
+            if (args.length === 0) {
+                throw new Error("missing value parameter");
+            }
+
+            validatePrimitive(value);
+
+            const equalsValue = args.shift();
+
+            /**
+             * The history of “typeof null”
+             * https://2ality.com/2013/10/typeof-null.html
+             * In JavaScript, typeof null is 'object', which incorrectly suggests
+             * that null is an object.
+             */
+            if (value === null) {
+                if (equalsValue === "null") {
+                    return true;
+                }
+                return false;
+            }
+
+            const typeOfValue = typeof value;
+
+            switch (typeOfValue) {
+                case "string":
+                    return value === equalsValue;
+                case "number":
+                    return value === parseFloat(equalsValue);
+                case "boolean":
+                    return value === (equalsValue === "true" || equalsValue === "on");
+                case "undefined":
+                    return equalsValue === "undefined";
+                default:
+                    throw new Error("type not supported");
+            }
+
         case "money":
         case "currency":
 

development/test/cases/data/transformer.mjs

@@ -28,6 +28,26 @@ describe('Transformer', function () {
     describe('Transformer.run()', function () {
 
         [
+            ['equals:a', "a", true],
+            ['equals:a', "b", false],
+            ['equals:3', 3, true],
+            ['equals:3', 6, false],
+            ['equals:on', true, true],
+            ['equals:true', true, true],
+            ['equals:on', false, false],
+            ['equals:true', false, false],
+            ['equals:off', false, true],
+            ['equals:false', false, true],
+            ['equals:off', false, true],
+            ['equals:false', true, false],
+            ['equals:3', 3, true],
+            ['equals:3', 6, false],
+            ['equals:undefined', undefined, true],
+            ['equals:undefined', 3, false],
+            ['equals:null', null, true],
+            ['equals:null', 3, false],
+            ['equals:3', 6, false],
+            ['currency', "EUR0", "0,00 €"],
             ['currency:1:2', "EUR14.25", "14,2 €"],
             ['currency', "EUR14.25", "14,25 €"],
             ['datetime', "2023-02-14 14:12:10", "14.2.2023, 14:12:10"],