fix: normalize header name in assertHeader & assertHeaderMissing

Author: Vahelnir

src/response.ts

@@ -393,6 +393,7 @@ export class ApiResponse extends Macroable {
    * has the expected value
    */
   assertHeader(name: string, value?: any) {
+    name = name.toLowerCase()
     this.#ensureHasAssert()
     this.assert!.property(this.headers(), name)
 
@@ -405,6 +406,7 @@ export class ApiResponse extends Macroable {
    * Assert response to not contain a given header
    */
   assertHeaderMissing(name: string) {
+    name = name.toLowerCase()
     this.#ensureHasAssert()
     this.assert!.notProperty(this.headers(), name)
   }

tests/response/assertions.spec.ts

@@ -104,11 +104,12 @@ test.group('Response | assertions', (group) => {
   })
 
   test('assert response headers', async ({ assert }) => {
-    assert.plan(2)
+    assert.plan(5)
 
     httpServer.onRequest((_, res) => {
       res.statusCode = 200
       res.setHeader('content-type', 'text/plain')
+      res.setHeader('Access-Control-Allow-Origin', '*')
       res.end('hello world')
     })
 
@@ -119,6 +120,9 @@ test.group('Response | assertions', (group) => {
 
     const response = await request
     response.assertHeader('content-type')
+    response.assertHeader('Content-Type')
+    response.assertHeader('access-control-allow-origin')
+    response.assertHeader('Access-Control-Allow-Origin')
     response.assertHeaderMissing('authorization')
   })