test: optional referenced parameters (#352)

* test: optional referenced parameters

reproduces bug reported in #351

* fix: optional referenced parameters

* test: adapt GitHub OpenAPI spec fixtures

Author: gr2m

src/utils.ts

@@ -124,3 +124,9 @@ export function tsPartial(type: string): string {
 export function tsUnionOf(types: string[]): string {
   return `(${types.join(") | (")})`;
 }
+
+/** Convert the components object and a 'components["parameters"]["param"]' string into the `param` object **/
+export function unrefComponent(components: any, ref: string) {
+  const [type, object] = ref.match(/(?<=\[")([^"]+)/g) as string[];
+  return components[type][object];
+}

src/v3.ts

@@ -18,6 +18,7 @@ import {
   tsPartial,
   tsUnionOf,
   tsTupleOf,
+  unrefComponent,
 } from "./utils";
 
 export const PRIMITIVES: { [key: string]: "boolean" | "string" | "number" } = {
@@ -193,7 +194,9 @@ export default function generateTypesV3(
       output += `"${loc}": {\n`;
       Object.entries(locParams).forEach(([paramName, paramProps]) => {
         if (typeof paramProps === "string") {
-          output += `"${paramName}": ${paramProps}\n`;
+          const { required } = unrefComponent(components, paramProps);
+          const key = required ? `"${paramName}"` : `"${paramName}"?`;
+          output += `${key}: ${paramProps}\n`;
           return;
         }
         if (paramProps.description) output += comment(paramProps.description);