Handle empty paramater conversion

Signed-off-by: Zabil Cheriya Maliackal <zabilcm@gmail.com>

e2e/specs/parameters.spec

@@ -0,0 +1,5 @@
+# Paramters
+
+## Check parameter conversion
+
+* Trimmed " " is the same as ""

e2e/tests/parameter.ts

@@ -0,0 +1,9 @@
+import * as assert from "node:assert";
+import { Step } from "gauge-ts";
+
+export default class Parameter {
+  @Step("Trimmed <original> is the same as <expected>")
+  public async checkTrimmeWord(original: string, expected: string) {
+    assert.strictEqual(original.trim(), expected);
+  }
+}

gauge-ts/src/processors/params/PrimitiveParser.ts

@@ -27,6 +27,7 @@ export class PrimitiveParser implements ParameterParser {
   }
 
   private convertToNumber(value: string): number | undefined {
+    if (value.trim() === "") return undefined;
     const num = Number(value);
     return Number.isNaN(num) ? undefined : num;
   }