Add test to check (openapi) block handling during backend refinement

server/http_integration_test.go

@@ -764,3 +764,21 @@ func TestHTTPServer_Endpoint_Evaluation_Inheritance(t *testing.T) {
 		cleanup(shutdown, t)
 	}
 }
+
+func TestHTTPServer_Endpoint_Evaluation_Inheritance_Backend_Block(t *testing.T) {
+	helper := test.New(t)
+	client := newClient()
+
+	shutdown, _ := newCouper("testdata/integration/endpoint_eval/08_couper.hcl", test.New(t))
+
+	req, err := http.NewRequest(http.MethodGet, "http://example.com:8080/", nil)
+	helper.Must(err)
+
+	res, err := client.Do(req)
+	helper.Must(err)
+
+	if res.StatusCode != http.StatusBadRequest {
+		t.Error("Expected a bad request without required query param")
+	}
+	cleanup(shutdown, t)
+}

server/testdata/integration/endpoint_eval/08_couper.hcl

@@ -0,0 +1,40 @@
+server "protected" {
+  error_file = "./../server_error.html"
+
+  api {
+    error_file = "./../api_error.json"
+
+    backend "anything" { # overrides definitions: backend "anything"
+      path = "/set/by/api/unset/by/endpoint"
+      openapi {
+        file = "also-not-there.yml"
+      }
+    }
+
+    endpoint "/" {
+      path = "/set/by/endpoint/unset/by/backend"
+      backend "anything" {
+        path = "/anything"
+        origin = "http://${req.path_params.origin}"
+        hostname = req.path_params.hostname
+        set_response_headers = {
+          x-origin = req.path_params.origin
+        }
+        openapi {
+          file = "08_schema.yaml"
+        }
+      }
+    }
+  }
+}
+
+definitions {
+  # backend origin within a definition block gets replaced with the integration test "anything" server.
+  backend "anything" {
+    path = "/not-found-anything"
+    origin = "http://anyserver/"
+    openapi {
+      file = "not-there.yml"
+    }
+  }
+}

server/testdata/integration/endpoint_eval/08_schema.yaml

@@ -0,0 +1,16 @@
+openapi: '3'
+info:
+  title: 'Couper backend validation test'
+  version: 'v1.2.3'
+paths:
+  /anything:
+    get:
+      parameters:
+        - in: query
+          name: myparam
+          schema:
+            type: string
+          required: true
+      responses:
+        200:
+          description: OK