Bind offering to_json_string, use it to make test pass

bindings/tbdex_wasm/src/resources/offering.rs

@@ -4,7 +4,7 @@ use crate::{
     web5::presentation_definition::WasmPresentationDefinition,
 };
 use tbdex::{
-    json::FromJson,
+    json::{FromJson, ToJson},
     resources::offering::{
         CancellationDetails, Offering, OfferingData, PayinDetails, PayinMethod, PayoutDetails,
         PayoutMethod,
@@ -46,6 +46,10 @@ impl WasmOffering {
         })
     }
 
+    pub fn to_json_string(&self) -> Result<String> {
+        Ok(self.inner.to_json_string().map_err(map_err)?)
+    }
+
     pub fn verify(&self) -> Result<()> {
         self.inner.verify().map_err(map_err)
     }

bound/typescript/src/resources/offering.ts

@@ -43,6 +43,14 @@ export class Offering {
     }
   }
 
+  toJSONString(): string {
+    try {
+      return this.toWASM().to_json_string();
+    } catch (error) {
+      throw catchTbdexError(error);
+    }
+  }
+
   static create(from: string, data: OfferingData, protocol?: string): Offering {
     try {
       return Offering.fromWASM(
@@ -62,6 +70,7 @@ export class Offering {
   }
 }
 
+// TODO consider using type's instead of class's like we used to
 export class OfferingData {
   readonly description: string;
   readonly payoutUnitsPerPayinUnit: string;

bound/typescript/src/wasm/generated.d.ts

@@ -251,6 +251,10 @@ export class WasmOffering {
 */
   static from_json_string(json: string): WasmOffering;
 /**
+* @returns {string}
+*/
+  to_json_string(): string;
+/**
 */
   verify(): void;
 /**

bound/typescript/tests/test-vectors.test.ts

@@ -7,7 +7,10 @@ describe("test vectors", () => {
     const input = OfferingVector.input;
     const offering = Offering.fromJSONString(input);
 
-    expect(offering).to.deep.equal(OfferingVector.output);
+    const offeringJSONString = offering.toJSONString();
+    const offeringJSON = JSON.parse(offeringJSONString);
+
+    expect(offeringJSON).to.deep.equal(OfferingVector.output);
 
     offering.verify();
   });