Fix query coercion issue

src/backend.test.ts

@@ -44,6 +44,30 @@ describe('OpenAPIBackend', () => {
       '/pets/{id}': {
         get: {
           operationId: 'getPetById',
+          parameters: [
+            {
+              name: 'id',
+              in: 'path',
+              required: true,
+              schema: {
+                type: 'string'
+              }
+            },
+            {
+              name: 'breed',
+              in: 'query',
+              schema: {
+                type: 'string'
+              }
+            },
+            {
+              name: 'age',
+              in: 'query',
+              schema: {
+                type: 'integer'
+              }
+            }
+          ],
           responses,
         },
         put: {
@@ -466,6 +490,30 @@ describe('OpenAPIBackend', () => {
         expect(mockHandler).toBeCalled();
       });
     });
+
+    describe('types coercion', () => {
+      test('coerces query types', async () => {
+        const api = new OpenAPIBackend({ definition });
+        const dummyHandler = jest.fn((context, req, ...rest) => req);
+        api.register('getPetById', dummyHandler);
+        await api.init();
+
+        const request = {
+          method: 'get',
+          path: '/pets/1',
+          headers: {},
+          query: {
+              breed: 'corgi',
+              age: '5',
+          }
+        };
+
+        const res = await api.handleRequest(request);
+        expect(dummyHandler).toBeCalledTimes(1);
+
+        expect(res.query).toStrictEqual({breed: 'corgi', age: 5});
+      });
+    })
   });
 
   describe('.mockResponseForOperation', () => {

src/backend.ts

@@ -421,7 +421,7 @@ export class OpenAPIBackend<D extends Document = Document> {
       }
 
       // handle route
-      return routeHandler(context as Context<D>, ...handlerArgs);
+      return routeHandler(context as Context<D>, req, ...handlerArgs);
     }).bind(this)();
 
     // post response handler

src/validation.ts

@@ -307,6 +307,10 @@ export class OpenAPIValidator<D extends Document = Document> {
       if (validate.errors) {
         result.errors.push(...validate.errors);
       }
+      else {
+        // set Ajv validator coerced query to request
+        req.query = parameters.query
+      }
     }
 
     if (_.isEmpty(result.errors)) {