feature(openapi-typescript): tighten JSON schema check

only assume JSON if the character following `{`, excluding white-space,
is `"`

Author: psimk

packages/openapi-typescript/src/lib/redoc.ts

@@ -64,7 +64,7 @@ export async function parseSchema(schema: unknown, { absoluteRef, resolver }: Pa
       });
     }
     // JSON
-    if (schema[0] === "{") {
+    if (/^\{\s*"/.test(schema.trimStart())) {
       return {
         source: new Source(absoluteRef, schema, "application/json"),
         parsed: parseJson(schema),

packages/openapi-typescript/test/node-api.test.ts

@@ -29,6 +29,25 @@ export interface components {
     pathItems: never;
 }
 export type $defs = Record<string, never>;
+export type operations = Record<string, never>;`,
+      },
+      // options: DEFAULT_OPTIONS,
+    ],
+    [
+      "input > string > YAML > flow-style",
+      {
+        given: `{ openapi: "3.1", info: { title: test, version: "1.0" } }`,
+        want: `export type paths = Record<string, never>;
+export type webhooks = Record<string, never>;
+export interface components {
+    schemas: never;
+    responses: never;
+    parameters: never;
+    requestBodies: never;
+    headers: never;
+    pathItems: never;
+}
+export type $defs = Record<string, never>;
 export type operations = Record<string, never>;`,
       },
       // options: DEFAULT_OPTIONS,