8.8AI-Generated Federation Tests

Ask AI to generate federation tests from your subgraph schemas:

Given the following Apollo Federation subgraph schemas, generate tests
that verify correct composition:

Subgraph 1 (ProductService):
type Product @key(fields: "id") {
  id: ID!
  name: String!
  price: Float!
  category: Category!
}

Subgraph 2 (InventoryService):
extend type Product @key(fields: "id") {
  id: ID! @external
  inStock: Boolean!
  warehouseLocation: String
}

Subgraph 3 (ReviewService):
extend type Product @key(fields: "id") {
  id: ID! @external
  reviews: [Review!]!
  averageRating: Float
}

Generate tests for:
1. Each subgraph's fields resolve correctly through the gateway
2. Cross-subgraph queries work (e.g., product with stock AND reviews)
3. Entity reference resolution (no null references)
4. Performance: cross-subgraph queries under 2s
5. Error handling: what happens when one subgraph is down?